LulaCola/DARC_Questioner_Qwen3-8B
8B • Updated
• 33
data_source stringclasses 1 value | prompt listlengths 1 1 | ability stringclasses 2 values | reward_model dict | extra_info dict |
|---|---|---|---|---|
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 1,
"style": "rule"
} | {
"answer_type": "categorical",
"index": 0,
"split": "train",
"text": "Isotopes of plutonium\n\nFrom Wikipedia, the free encyclopedia\n (Redirected from Plutonium-236)\nJump to: navigation, search\nActinides and fission products by half-life\nActinides[1] by decay chain Half-life\nrange (a)\nFission products of 235U by yield[2]\n4n 4n+1 4n+2 4n+3\n4.5–7% 0.04–1.25% <0.001%\n228Ra 4–6 155Euþ\n244Cm 241Puƒ 250Cf 227Ac 10–29 90Sr 85Kr 113mCdþ\n232Uƒ 238Pu 243Cmƒ 29–97 137Cs 151Smþ 121mSn\n248Bk[3] 249Cfƒ 242mAmƒ 141–351\n\nNo fission products\nhave a half-life\nin the range of\n100–210k years…\n\n241Am 251Cfƒ[4] 430–900\n226Ra 247Bk 1.3k–1.6k\n240Pu 229Th 246Cm 243Am 4.7k–7.4k\n245Cmƒ 250Cm 8.3k–8.5k\n239Puƒ 24.1k\n230Th 231Pa 32k–76k\n236Npƒ 233Uƒ 234U 150k–250k 99Tc 126Sn\n248Cm 242Pu 327k–375k 79Se\n1.53M 93Zr\n237Np 2.1M–6.5M 135Cs 107Pd\n236U 247Cmƒ 15M–24M 129I\n244Pu 80M\n\n...nor beyond 15.7M[5]\n\n232Th 238U 235Uƒ№ 0.7G–14.1G\n\nLegend for superscript symbols\nƒ fissile\nmetastable isomer\n№ naturally occurring radioactive material (NORM)\n† range 4a–97a: Medium-lived fission product\n‡ over 200ka: Long-lived fission product\n\nPlutonium (Pu) is an artificial element, except for trace quantities of primordial 244Pu, and thus a standard atomic mass cannot be given. Like all artificial elements, it has no stable isotopes. It was synthesized long before being found in nature, the first isotope synthesized being 238Pu in 1940. Twenty plutonium radioisotopes have been characterized. The most stable are Pu-244, with a half-life of 80.8 million years, Pu-242, with a half-life of 373,300 years, and Pu-239, with a half-life of 24,110 years. All of the remaining radioactive isotopes have half-lives that are less than 7,000 years. This element also has eight meta states, though none is very stable; all meta states have half-lives of less than one second.\n\nThe isotopes of plutonium range in atomic weight from 228.0387 u (Pu-228) to 247.074 u (Pu-247). The primary decay modes before the most stable isotope, Pu-244, are spontaneous fission and alpha emission; the initial mode after is beta emission. The primary decay products before Pu-244 are isotopes of uranium and neptunium (neglecting the wide range of daughter nuclei created by fission processes), and the primary products after are isotopes of americium.\n\nNotable Isotopes[edit]\n\nProduction and uses[edit]\n\nA pellet of plutonium-238, glowing from its own heat, used for radioisotope thermoelectric generators.\nTransmutation flow between 238Pu and 244Cm in LWR.[7]\nTransmutation speed not shown and varies greatly by nuclide.\n245Cm–248Cm are long-lived with negligible decay.\n\nPu-239, a fissile isotope which is the second most used nuclear fuel in nuclear reactors after U-235, and the most used fuel in the fission portion of nuclear weapons, is produced from U-238 by neutron capture followed by two beta decays.\n\nPu-240, Pu-241, Pu-242 are produced by further neutron capture. The odd-mass isotopes Pu-239 and Pu-241 have about a 3/4 chance of undergoing fission on capture of a thermal neutron and about a 1/4 chance of retaining the neutron and becoming the following isotope. The even-mass isotopes are fertile material but not fissile and also have a lower overall probability (cross section) of neutron capture; therefore, they tend to accumulate in nuclear fuel used in a thermal reactor, the design of nearly all nuclear power plants today. In plutonium that has been used a second time in thermal reactors in MOX fuel, Pu-240 may even be the most common isotope. All plutonium isotopes and other actinides, however, are fissionable with fast neutrons. Pu-240 does have a moderate thermal neutron absorption cross section, so that Pu-241 production in a thermal reactor becomes a significant fraction as large as Pu-239 production.\n\nPu-241 has a half-life of 14 years, and has slightly higher thermal neutron cross sections than Pu-239 for both fission and absorption. While nuclear fuel is being used in a reactor, a Pu-241 nucleus is much more likely to fission or to capture a neutron than to decay. Pu-241 accounts for a significant proportion of fissions in thermal reactor fuel that has been used for some time. However, in spent nuclear fuel that does not quickly undergo nuclear reprocessing but instead is cooled for years after use, much or most of the Pu-241 will beta decay to americium-241, one of the minor actinides, a strong alpha emitter, and difficult to use in thermal reactors.\n\nPu-242 has a particularly low cross section for thermal neutron capture; and it takes four neutron absorptions to become another fissile isotope (either curium-245 or Pu-241) and fission. Even then, there is a chance either of those two fissile isotopes will fail to fission but instead absorb the fourth neutron, becoming curium-246 (on the way to even heavier actinides like californium, which is a neutron emitter by spontaneous fission and difficult to handle) or becoming Pu-242 again; so the mean number of neutrons absorbed before fission is even higher than 4. Therefore Pu-242 is particularly unsuited to recycling in a thermal reactor and would be better used in a fast reactor where it can be fissioned directly. However, Pu-242's low cross section means that relatively little of it will be transmuted during one cycle in a thermal reactor. Pu-242's half-life is about 15 times as long as Pu-239's half-life; therefore it is 1/15 as radioactive and not one of the larger contributors to nuclear waste radioactivity. 242Pu's gamma ray emissions are also weaker than those of the other isotopes.[8]\n\nPu-243 has a half-life of only 5 hours, beta decaying to americium-243. Because Pu-243 has little opportunity to capture an additional neutron before decay, the nuclear fuel cycle does not produce the extremely long-lived Pu-244 in significant quantity.\n\nPu-238 is not normally produced in as large quantity by the nuclear fuel cycle, but some is produced from neptunium-237 by neutron capture (this reaction can also be used with purified neptunium to produce Pu-238 relatively free of other plutonium isotopes for use in radioisotope thermoelectric generators), by the (n,2n) reaction of fast neutrons on Pu-239, or by alpha decay of curium-242 which is produced by neutron capture from Am-241. It has significant thermal neutron cross section for fission, but is more likely to capture a neutron and become Pu-239.\n\n\nPu-240, Pu-241 and Pu-242[edit]\n\nThe fission cross section for 239Pu is 747.9 barns for thermal neutrons, while the activation cross section is 270.7 barns (the ratio approximates to 11 fissions for every 4 neutron captures). The higher plutonium isotopes are created when the uranium fuel is used for a long time. It is the case that for high burnup used fuel that the concentrations of the higher plutonium isotopes will be higher than the low burnup fuel which is reprocessed to obtain weapons grade plutonium.\n\nThe formation of 240Pu, 241Pu and 242Pu from 238U\nIsotope Thermal neutron\ncross section[9]\nCapture Fission\n238U 2.683 0.000 α 4.468 x 109 years\n239U 20.57 14.11 β 23.45 minutes\n239Np 77.03 β 2.356 days\n239Pu 270.7 747.9 α 24,110 years\n240Pu 287.5 0.064 α 6,561 years\n241Pu 363.0 1012 β 14.325 years\n242Pu 19.16 0.001 α 373,300 years\n\n\nMain article: Plutonium-239\n\n\nA ring of weapons-grade electrorefined plutonium, with 99.96% purity. This 5.3 kg ring is enough plutonium for use in an efficient nuclear weapon. The ring shape is needed to depart from a spherical shape and avoid criticality.\nThe formation of 239Pu from 238U[10]\nElement Isotope Thermal neutron capture\ncross section (barn)\nThermal neutron fission\nCross section (barn)\ndecay mode halflife\nU 238 2.68 5·10−6 α 4.47 x 109 years\nU 239 22 15 β 23 minutes\nNp 239 30 1 β 2.36 days\nPu 239 271 750 α 24,110 years\n\n\nMain article: Plutonium-238\n\n\nThe formation of 238Pu from 235U\nElement Isotope Thermal neutron\ncross section\ndecay mode halflife\nU 235 99 α 703,800,000 years\nU 236 5.3 α 23,420,000 years\nU 237 - β 6.75 days\nNp 237 165 (capture) α 2,144,000 years\nNp 238 - β 2.11 days\nPu 238 - α 87.7 years\n\nPu-240 as obstacle to nuclear weapons[edit]\n\nPu-240 undergoes spontaneous fission as a secondary decay mode at a small but significant rate. The presence of Pu-240 limits the plutonium's nuclear bomb potential because the neutron flux from spontaneous fission, initiates the chain reaction prematurely and reduces the bomb's power by exploding the core before full implosion is reached. Plutonium consisting of more than about 90% Pu-239 is called weapons-grade plutonium; plutonium from spent nuclear fuel from commercial power reactors generally contains at least 20% Pu-240 and is called reactor-grade plutonium. However, modern nuclear weapons use fusion boosting which mitigates the predetonation problem; if the pit can generate a nuclear weapon yield of even a fraction of a kiloton, which is enough to start deuterium-tritium fusion, the resulting burst of neutrons will fission enough plutonium to ensure a yield of tens of kilotons.\n\nPu-240 contamination is the reason plutonium weapons must use the implosion method. Theoretically, pure Pu-239 could be used in a gun-type nuclear weapon, but achieving this level of purity is prohibitively difficult. Pu-240 contamination has proven a mixed blessing to nuclear weapons design. While it created delays and headaches during the Manhattan Project because of the need to develop implosion technology, those very same difficulties are currently a barrier to nuclear proliferation. Implosion devices are also inherently more efficient and less prone toward accidental detonation than are gun-type weapons.\n\n\nZ(p) N(n) \nisotopic mass (u)\nhalf-life decay\nmode(s)[11][n 1]\nisotope(s)[n 2]\n(mole fraction)\nrange of natural\n(mole fraction)\nexcitation energy\n228Pu 94 134 228.03874(3) 1.1(+20-5) s α (99.9%) 224U 0+\nβ+ (.1%) 228Np\n229Pu 94 135 229.04015(6) 120(50) s α 225U 3/2+#\n230Pu 94 136 230.039650(16) 1.70(17) min α 226U 0+\nβ+ (rare) 230Np\n231Pu 94 137 231.041101(28) 8.6(5) min β+ 231Np 3/2+#\nα (rare) 227U\n232Pu 94 138 232.041187(19) 33.7(5) min EC (89%) 232Np 0+\nα (11%) 228U\n233Pu 94 139 233.04300(5) 20.9(4) min β+ (99.88%) 233Np 5/2+#\nα (.12%) 229U\n234Pu 94 140 234.043317(7) 8.8(1) h EC (94%) 234Np 0+\nα (6%) 230U\n235Pu 94 141 235.045286(22) 25.3(5) min β+ (99.99%) 235Np (5/2+)\nα (.0027%) 231U\n236Pu 94 142 236.0460580(24) 2.858(8) a α 232U 0+\nSF (1.37×10−7%) (various)\nCD (2×10−12%) 208Pb\nβ+β+ (rare) 236U\n237Pu 94 143 237.0484097(24) 45.2(1) d EC 237Np 7/2-\nα (.0042%) 233U\n237m1Pu 145.544(10) keV 180(20) ms IT 237Pu 1/2+\n237m2Pu 2900(250) keV 1.1(1) µs\n238Pu 94 144 238.0495599(20) 87.7(1) a α 234U 0+\nSF (1.9×10−7%) (various)\nCD (1.4×10−14%) 206Hg\nCD (6×10−15%) 180Yb\n239Pu[n 3][n 4] 94 145 239.0521634(20) 2.411(3)×104 a α 235U 1/2+\nSF (3.1×10−10%) (various)\n239m1Pu 391.584(3) keV 193(4) ns 7/2-\n239m2Pu 3100(200) keV 7.5(10) µs (5/2+)\n240Pu 94 146 240.0538135(20) 6,561(7) a α 236U 0+\nSF (5.7×10−6%) (various)\nCD (1.3×10−13%) 206Hg\n241Pu[n 3] 94 147 241.0568515(20) 14.290(6) a β- (99.99%) 241Am 5/2+\nα (.00245%) 237U\nSF (2.4×10−14%) (various)\n241m1Pu 161.6(1) keV 0.88(5) µs 1/2+\n241m2Pu 2200(200) keV 21(3) µs\n242Pu 94 148 242.0587426(20) 3.75(2)×105 a α 238U 0+\nSF (5.5×10−4%) (various)\n243Pu[n 3] 94 149 243.062003(3) 4.956(3) h β- 243Am 7/2+\n243mPu 383.6(4) keV 330(30) ns (1/2+)\n244Pu[n 5] 94 150 244.064204(5) 8.00(9)×107 a α (99.88%) 240U 0+ Trace\nSF (.123%) (various)\nβ-β- (7.3×10−9%) 244Cm\n245Pu 94 151 245.067747(15) 10.5(1) h β- 245Am (9/2-)\n246Pu 94 152 246.070205(16) 10.84(2) d β- 246mAm 0+\n247Pu 94 153 247.07407(32)# 2.27(23) d β- 247Am 1/2+#\n 1. ^ Abbreviations:\n CD: Cluster decay\n EC: Electron capture\n IT: Isomeric transition\n SF: Spontaneous fission\n 2. ^ Bold for stable isotopes\n 3. ^ a b c Fissile nuclide\n 4. ^ Most useful isotope for nuclear weapons\n 5. ^ Primordial radionuclide\n\n\n\n\n 6. ^\n 9. ^ National Nuclear Data Center Interactive Chart of Nuclides\n 10. ^ Miner 1968, p. 541\n 11. ^\nIsotopes of neptunium Isotopes of plutonium Isotopes of americium\nTable of nuclides"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 2,
"style": "rule"
} | {
"answer_type": "categorical",
"index": 0,
"split": "train",
"text": "Isotopes of plutonium\n\nFrom Wikipedia, the free encyclopedia\n (Redirected from Plutonium-236)\nJump to: navigation, search\nActinides and fission products by half-life\nActinides[1] by decay chain Half-life\nrange (a)\nFission products of 235U by yield[2]\n4n 4n+1 4n+2 4n+3\n4.5–7% 0.04–1.25% <0.001%\n228Ra 4–6 155Euþ\n244Cm 241Puƒ 250Cf 227Ac 10–29 90Sr 85Kr 113mCdþ\n232Uƒ 238Pu 243Cmƒ 29–97 137Cs 151Smþ 121mSn\n248Bk[3] 249Cfƒ 242mAmƒ 141–351\n\nNo fission products\nhave a half-life\nin the range of\n100–210k years…\n\n241Am 251Cfƒ[4] 430–900\n226Ra 247Bk 1.3k–1.6k\n240Pu 229Th 246Cm 243Am 4.7k–7.4k\n245Cmƒ 250Cm 8.3k–8.5k\n239Puƒ 24.1k\n230Th 231Pa 32k–76k\n236Npƒ 233Uƒ 234U 150k–250k 99Tc 126Sn\n248Cm 242Pu 327k–375k 79Se\n1.53M 93Zr\n237Np 2.1M–6.5M 135Cs 107Pd\n236U 247Cmƒ 15M–24M 129I\n244Pu 80M\n\n...nor beyond 15.7M[5]\n\n232Th 238U 235Uƒ№ 0.7G–14.1G\n\nLegend for superscript symbols\nƒ fissile\nmetastable isomer\n№ naturally occurring radioactive material (NORM)\n† range 4a–97a: Medium-lived fission product\n‡ over 200ka: Long-lived fission product\n\nPlutonium (Pu) is an artificial element, except for trace quantities of primordial 244Pu, and thus a standard atomic mass cannot be given. Like all artificial elements, it has no stable isotopes. It was synthesized long before being found in nature, the first isotope synthesized being 238Pu in 1940. Twenty plutonium radioisotopes have been characterized. The most stable are Pu-244, with a half-life of 80.8 million years, Pu-242, with a half-life of 373,300 years, and Pu-239, with a half-life of 24,110 years. All of the remaining radioactive isotopes have half-lives that are less than 7,000 years. This element also has eight meta states, though none is very stable; all meta states have half-lives of less than one second.\n\nThe isotopes of plutonium range in atomic weight from 228.0387 u (Pu-228) to 247.074 u (Pu-247). The primary decay modes before the most stable isotope, Pu-244, are spontaneous fission and alpha emission; the initial mode after is beta emission. The primary decay products before Pu-244 are isotopes of uranium and neptunium (neglecting the wide range of daughter nuclei created by fission processes), and the primary products after are isotopes of americium.\n\nNotable Isotopes[edit]\n\nProduction and uses[edit]\n\nA pellet of plutonium-238, glowing from its own heat, used for radioisotope thermoelectric generators.\nTransmutation flow between 238Pu and 244Cm in LWR.[7]\nTransmutation speed not shown and varies greatly by nuclide.\n245Cm–248Cm are long-lived with negligible decay.\n\nPu-239, a fissile isotope which is the second most used nuclear fuel in nuclear reactors after U-235, and the most used fuel in the fission portion of nuclear weapons, is produced from U-238 by neutron capture followed by two beta decays.\n\nPu-240, Pu-241, Pu-242 are produced by further neutron capture. The odd-mass isotopes Pu-239 and Pu-241 have about a 3/4 chance of undergoing fission on capture of a thermal neutron and about a 1/4 chance of retaining the neutron and becoming the following isotope. The even-mass isotopes are fertile material but not fissile and also have a lower overall probability (cross section) of neutron capture; therefore, they tend to accumulate in nuclear fuel used in a thermal reactor, the design of nearly all nuclear power plants today. In plutonium that has been used a second time in thermal reactors in MOX fuel, Pu-240 may even be the most common isotope. All plutonium isotopes and other actinides, however, are fissionable with fast neutrons. Pu-240 does have a moderate thermal neutron absorption cross section, so that Pu-241 production in a thermal reactor becomes a significant fraction as large as Pu-239 production.\n\nPu-241 has a half-life of 14 years, and has slightly higher thermal neutron cross sections than Pu-239 for both fission and absorption. While nuclear fuel is being used in a reactor, a Pu-241 nucleus is much more likely to fission or to capture a neutron than to decay. Pu-241 accounts for a significant proportion of fissions in thermal reactor fuel that has been used for some time. However, in spent nuclear fuel that does not quickly undergo nuclear reprocessing but instead is cooled for years after use, much or most of the Pu-241 will beta decay to americium-241, one of the minor actinides, a strong alpha emitter, and difficult to use in thermal reactors.\n\nPu-242 has a particularly low cross section for thermal neutron capture; and it takes four neutron absorptions to become another fissile isotope (either curium-245 or Pu-241) and fission. Even then, there is a chance either of those two fissile isotopes will fail to fission but instead absorb the fourth neutron, becoming curium-246 (on the way to even heavier actinides like californium, which is a neutron emitter by spontaneous fission and difficult to handle) or becoming Pu-242 again; so the mean number of neutrons absorbed before fission is even higher than 4. Therefore Pu-242 is particularly unsuited to recycling in a thermal reactor and would be better used in a fast reactor where it can be fissioned directly. However, Pu-242's low cross section means that relatively little of it will be transmuted during one cycle in a thermal reactor. Pu-242's half-life is about 15 times as long as Pu-239's half-life; therefore it is 1/15 as radioactive and not one of the larger contributors to nuclear waste radioactivity. 242Pu's gamma ray emissions are also weaker than those of the other isotopes.[8]\n\nPu-243 has a half-life of only 5 hours, beta decaying to americium-243. Because Pu-243 has little opportunity to capture an additional neutron before decay, the nuclear fuel cycle does not produce the extremely long-lived Pu-244 in significant quantity.\n\nPu-238 is not normally produced in as large quantity by the nuclear fuel cycle, but some is produced from neptunium-237 by neutron capture (this reaction can also be used with purified neptunium to produce Pu-238 relatively free of other plutonium isotopes for use in radioisotope thermoelectric generators), by the (n,2n) reaction of fast neutrons on Pu-239, or by alpha decay of curium-242 which is produced by neutron capture from Am-241. It has significant thermal neutron cross section for fission, but is more likely to capture a neutron and become Pu-239.\n\n\nPu-240, Pu-241 and Pu-242[edit]\n\nThe fission cross section for 239Pu is 747.9 barns for thermal neutrons, while the activation cross section is 270.7 barns (the ratio approximates to 11 fissions for every 4 neutron captures). The higher plutonium isotopes are created when the uranium fuel is used for a long time. It is the case that for high burnup used fuel that the concentrations of the higher plutonium isotopes will be higher than the low burnup fuel which is reprocessed to obtain weapons grade plutonium.\n\nThe formation of 240Pu, 241Pu and 242Pu from 238U\nIsotope Thermal neutron\ncross section[9]\nCapture Fission\n238U 2.683 0.000 α 4.468 x 109 years\n239U 20.57 14.11 β 23.45 minutes\n239Np 77.03 β 2.356 days\n239Pu 270.7 747.9 α 24,110 years\n240Pu 287.5 0.064 α 6,561 years\n241Pu 363.0 1012 β 14.325 years\n242Pu 19.16 0.001 α 373,300 years\n\n\nMain article: Plutonium-239\n\n\nA ring of weapons-grade electrorefined plutonium, with 99.96% purity. This 5.3 kg ring is enough plutonium for use in an efficient nuclear weapon. The ring shape is needed to depart from a spherical shape and avoid criticality.\nThe formation of 239Pu from 238U[10]\nElement Isotope Thermal neutron capture\ncross section (barn)\nThermal neutron fission\nCross section (barn)\ndecay mode halflife\nU 238 2.68 5·10−6 α 4.47 x 109 years\nU 239 22 15 β 23 minutes\nNp 239 30 1 β 2.36 days\nPu 239 271 750 α 24,110 years\n\n\nMain article: Plutonium-238\n\n\nThe formation of 238Pu from 235U\nElement Isotope Thermal neutron\ncross section\ndecay mode halflife\nU 235 99 α 703,800,000 years\nU 236 5.3 α 23,420,000 years\nU 237 - β 6.75 days\nNp 237 165 (capture) α 2,144,000 years\nNp 238 - β 2.11 days\nPu 238 - α 87.7 years\n\nPu-240 as obstacle to nuclear weapons[edit]\n\nPu-240 undergoes spontaneous fission as a secondary decay mode at a small but significant rate. The presence of Pu-240 limits the plutonium's nuclear bomb potential because the neutron flux from spontaneous fission, initiates the chain reaction prematurely and reduces the bomb's power by exploding the core before full implosion is reached. Plutonium consisting of more than about 90% Pu-239 is called weapons-grade plutonium; plutonium from spent nuclear fuel from commercial power reactors generally contains at least 20% Pu-240 and is called reactor-grade plutonium. However, modern nuclear weapons use fusion boosting which mitigates the predetonation problem; if the pit can generate a nuclear weapon yield of even a fraction of a kiloton, which is enough to start deuterium-tritium fusion, the resulting burst of neutrons will fission enough plutonium to ensure a yield of tens of kilotons.\n\nPu-240 contamination is the reason plutonium weapons must use the implosion method. Theoretically, pure Pu-239 could be used in a gun-type nuclear weapon, but achieving this level of purity is prohibitively difficult. Pu-240 contamination has proven a mixed blessing to nuclear weapons design. While it created delays and headaches during the Manhattan Project because of the need to develop implosion technology, those very same difficulties are currently a barrier to nuclear proliferation. Implosion devices are also inherently more efficient and less prone toward accidental detonation than are gun-type weapons.\n\n\nZ(p) N(n) \nisotopic mass (u)\nhalf-life decay\nmode(s)[11][n 1]\nisotope(s)[n 2]\n(mole fraction)\nrange of natural\n(mole fraction)\nexcitation energy\n228Pu 94 134 228.03874(3) 1.1(+20-5) s α (99.9%) 224U 0+\nβ+ (.1%) 228Np\n229Pu 94 135 229.04015(6) 120(50) s α 225U 3/2+#\n230Pu 94 136 230.039650(16) 1.70(17) min α 226U 0+\nβ+ (rare) 230Np\n231Pu 94 137 231.041101(28) 8.6(5) min β+ 231Np 3/2+#\nα (rare) 227U\n232Pu 94 138 232.041187(19) 33.7(5) min EC (89%) 232Np 0+\nα (11%) 228U\n233Pu 94 139 233.04300(5) 20.9(4) min β+ (99.88%) 233Np 5/2+#\nα (.12%) 229U\n234Pu 94 140 234.043317(7) 8.8(1) h EC (94%) 234Np 0+\nα (6%) 230U\n235Pu 94 141 235.045286(22) 25.3(5) min β+ (99.99%) 235Np (5/2+)\nα (.0027%) 231U\n236Pu 94 142 236.0460580(24) 2.858(8) a α 232U 0+\nSF (1.37×10−7%) (various)\nCD (2×10−12%) 208Pb\nβ+β+ (rare) 236U\n237Pu 94 143 237.0484097(24) 45.2(1) d EC 237Np 7/2-\nα (.0042%) 233U\n237m1Pu 145.544(10) keV 180(20) ms IT 237Pu 1/2+\n237m2Pu 2900(250) keV 1.1(1) µs\n238Pu 94 144 238.0495599(20) 87.7(1) a α 234U 0+\nSF (1.9×10−7%) (various)\nCD (1.4×10−14%) 206Hg\nCD (6×10−15%) 180Yb\n239Pu[n 3][n 4] 94 145 239.0521634(20) 2.411(3)×104 a α 235U 1/2+\nSF (3.1×10−10%) (various)\n239m1Pu 391.584(3) keV 193(4) ns 7/2-\n239m2Pu 3100(200) keV 7.5(10) µs (5/2+)\n240Pu 94 146 240.0538135(20) 6,561(7) a α 236U 0+\nSF (5.7×10−6%) (various)\nCD (1.3×10−13%) 206Hg\n241Pu[n 3] 94 147 241.0568515(20) 14.290(6) a β- (99.99%) 241Am 5/2+\nα (.00245%) 237U\nSF (2.4×10−14%) (various)\n241m1Pu 161.6(1) keV 0.88(5) µs 1/2+\n241m2Pu 2200(200) keV 21(3) µs\n242Pu 94 148 242.0587426(20) 3.75(2)×105 a α 238U 0+\nSF (5.5×10−4%) (various)\n243Pu[n 3] 94 149 243.062003(3) 4.956(3) h β- 243Am 7/2+\n243mPu 383.6(4) keV 330(30) ns (1/2+)\n244Pu[n 5] 94 150 244.064204(5) 8.00(9)×107 a α (99.88%) 240U 0+ Trace\nSF (.123%) (various)\nβ-β- (7.3×10−9%) 244Cm\n245Pu 94 151 245.067747(15) 10.5(1) h β- 245Am (9/2-)\n246Pu 94 152 246.070205(16) 10.84(2) d β- 246mAm 0+\n247Pu 94 153 247.07407(32)# 2.27(23) d β- 247Am 1/2+#\n 1. ^ Abbreviations:\n CD: Cluster decay\n EC: Electron capture\n IT: Isomeric transition\n SF: Spontaneous fission\n 2. ^ Bold for stable isotopes\n 3. ^ a b c Fissile nuclide\n 4. ^ Most useful isotope for nuclear weapons\n 5. ^ Primordial radionuclide\n\n\n\n\n 6. ^\n 9. ^ National Nuclear Data Center Interactive Chart of Nuclides\n 10. ^ Miner 1968, p. 541\n 11. ^\nIsotopes of neptunium Isotopes of plutonium Isotopes of americium\nTable of nuclides"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
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"text": "Isotopes of plutonium\n\nFrom Wikipedia, the free encyclopedia\n (Redirected from Plutonium-236)\nJump to: navigation, search\nActinides and fission products by half-life\nActinides[1] by decay chain Half-life\nrange (a)\nFission products of 235U by yield[2]\n4n 4n+1 4n+2 4n+3\n4.5–7% 0.04–1.25% <0.001%\n228Ra 4–6 155Euþ\n244Cm 241Puƒ 250Cf 227Ac 10–29 90Sr 85Kr 113mCdþ\n232Uƒ 238Pu 243Cmƒ 29–97 137Cs 151Smþ 121mSn\n248Bk[3] 249Cfƒ 242mAmƒ 141–351\n\nNo fission products\nhave a half-life\nin the range of\n100–210k years…\n\n241Am 251Cfƒ[4] 430–900\n226Ra 247Bk 1.3k–1.6k\n240Pu 229Th 246Cm 243Am 4.7k–7.4k\n245Cmƒ 250Cm 8.3k–8.5k\n239Puƒ 24.1k\n230Th 231Pa 32k–76k\n236Npƒ 233Uƒ 234U 150k–250k 99Tc 126Sn\n248Cm 242Pu 327k–375k 79Se\n1.53M 93Zr\n237Np 2.1M–6.5M 135Cs 107Pd\n236U 247Cmƒ 15M–24M 129I\n244Pu 80M\n\n...nor beyond 15.7M[5]\n\n232Th 238U 235Uƒ№ 0.7G–14.1G\n\nLegend for superscript symbols\nƒ fissile\nmetastable isomer\n№ naturally occurring radioactive material (NORM)\n† range 4a–97a: Medium-lived fission product\n‡ over 200ka: Long-lived fission product\n\nPlutonium (Pu) is an artificial element, except for trace quantities of primordial 244Pu, and thus a standard atomic mass cannot be given. Like all artificial elements, it has no stable isotopes. It was synthesized long before being found in nature, the first isotope synthesized being 238Pu in 1940. Twenty plutonium radioisotopes have been characterized. The most stable are Pu-244, with a half-life of 80.8 million years, Pu-242, with a half-life of 373,300 years, and Pu-239, with a half-life of 24,110 years. All of the remaining radioactive isotopes have half-lives that are less than 7,000 years. This element also has eight meta states, though none is very stable; all meta states have half-lives of less than one second.\n\nThe isotopes of plutonium range in atomic weight from 228.0387 u (Pu-228) to 247.074 u (Pu-247). The primary decay modes before the most stable isotope, Pu-244, are spontaneous fission and alpha emission; the initial mode after is beta emission. The primary decay products before Pu-244 are isotopes of uranium and neptunium (neglecting the wide range of daughter nuclei created by fission processes), and the primary products after are isotopes of americium.\n\nNotable Isotopes[edit]\n\nProduction and uses[edit]\n\nA pellet of plutonium-238, glowing from its own heat, used for radioisotope thermoelectric generators.\nTransmutation flow between 238Pu and 244Cm in LWR.[7]\nTransmutation speed not shown and varies greatly by nuclide.\n245Cm–248Cm are long-lived with negligible decay.\n\nPu-239, a fissile isotope which is the second most used nuclear fuel in nuclear reactors after U-235, and the most used fuel in the fission portion of nuclear weapons, is produced from U-238 by neutron capture followed by two beta decays.\n\nPu-240, Pu-241, Pu-242 are produced by further neutron capture. The odd-mass isotopes Pu-239 and Pu-241 have about a 3/4 chance of undergoing fission on capture of a thermal neutron and about a 1/4 chance of retaining the neutron and becoming the following isotope. The even-mass isotopes are fertile material but not fissile and also have a lower overall probability (cross section) of neutron capture; therefore, they tend to accumulate in nuclear fuel used in a thermal reactor, the design of nearly all nuclear power plants today. In plutonium that has been used a second time in thermal reactors in MOX fuel, Pu-240 may even be the most common isotope. All plutonium isotopes and other actinides, however, are fissionable with fast neutrons. Pu-240 does have a moderate thermal neutron absorption cross section, so that Pu-241 production in a thermal reactor becomes a significant fraction as large as Pu-239 production.\n\nPu-241 has a half-life of 14 years, and has slightly higher thermal neutron cross sections than Pu-239 for both fission and absorption. While nuclear fuel is being used in a reactor, a Pu-241 nucleus is much more likely to fission or to capture a neutron than to decay. Pu-241 accounts for a significant proportion of fissions in thermal reactor fuel that has been used for some time. However, in spent nuclear fuel that does not quickly undergo nuclear reprocessing but instead is cooled for years after use, much or most of the Pu-241 will beta decay to americium-241, one of the minor actinides, a strong alpha emitter, and difficult to use in thermal reactors.\n\nPu-242 has a particularly low cross section for thermal neutron capture; and it takes four neutron absorptions to become another fissile isotope (either curium-245 or Pu-241) and fission. Even then, there is a chance either of those two fissile isotopes will fail to fission but instead absorb the fourth neutron, becoming curium-246 (on the way to even heavier actinides like californium, which is a neutron emitter by spontaneous fission and difficult to handle) or becoming Pu-242 again; so the mean number of neutrons absorbed before fission is even higher than 4. Therefore Pu-242 is particularly unsuited to recycling in a thermal reactor and would be better used in a fast reactor where it can be fissioned directly. However, Pu-242's low cross section means that relatively little of it will be transmuted during one cycle in a thermal reactor. Pu-242's half-life is about 15 times as long as Pu-239's half-life; therefore it is 1/15 as radioactive and not one of the larger contributors to nuclear waste radioactivity. 242Pu's gamma ray emissions are also weaker than those of the other isotopes.[8]\n\nPu-243 has a half-life of only 5 hours, beta decaying to americium-243. Because Pu-243 has little opportunity to capture an additional neutron before decay, the nuclear fuel cycle does not produce the extremely long-lived Pu-244 in significant quantity.\n\nPu-238 is not normally produced in as large quantity by the nuclear fuel cycle, but some is produced from neptunium-237 by neutron capture (this reaction can also be used with purified neptunium to produce Pu-238 relatively free of other plutonium isotopes for use in radioisotope thermoelectric generators), by the (n,2n) reaction of fast neutrons on Pu-239, or by alpha decay of curium-242 which is produced by neutron capture from Am-241. It has significant thermal neutron cross section for fission, but is more likely to capture a neutron and become Pu-239.\n\n\nPu-240, Pu-241 and Pu-242[edit]\n\nThe fission cross section for 239Pu is 747.9 barns for thermal neutrons, while the activation cross section is 270.7 barns (the ratio approximates to 11 fissions for every 4 neutron captures). The higher plutonium isotopes are created when the uranium fuel is used for a long time. It is the case that for high burnup used fuel that the concentrations of the higher plutonium isotopes will be higher than the low burnup fuel which is reprocessed to obtain weapons grade plutonium.\n\nThe formation of 240Pu, 241Pu and 242Pu from 238U\nIsotope Thermal neutron\ncross section[9]\nCapture Fission\n238U 2.683 0.000 α 4.468 x 109 years\n239U 20.57 14.11 β 23.45 minutes\n239Np 77.03 β 2.356 days\n239Pu 270.7 747.9 α 24,110 years\n240Pu 287.5 0.064 α 6,561 years\n241Pu 363.0 1012 β 14.325 years\n242Pu 19.16 0.001 α 373,300 years\n\n\nMain article: Plutonium-239\n\n\nA ring of weapons-grade electrorefined plutonium, with 99.96% purity. This 5.3 kg ring is enough plutonium for use in an efficient nuclear weapon. The ring shape is needed to depart from a spherical shape and avoid criticality.\nThe formation of 239Pu from 238U[10]\nElement Isotope Thermal neutron capture\ncross section (barn)\nThermal neutron fission\nCross section (barn)\ndecay mode halflife\nU 238 2.68 5·10−6 α 4.47 x 109 years\nU 239 22 15 β 23 minutes\nNp 239 30 1 β 2.36 days\nPu 239 271 750 α 24,110 years\n\n\nMain article: Plutonium-238\n\n\nThe formation of 238Pu from 235U\nElement Isotope Thermal neutron\ncross section\ndecay mode halflife\nU 235 99 α 703,800,000 years\nU 236 5.3 α 23,420,000 years\nU 237 - β 6.75 days\nNp 237 165 (capture) α 2,144,000 years\nNp 238 - β 2.11 days\nPu 238 - α 87.7 years\n\nPu-240 as obstacle to nuclear weapons[edit]\n\nPu-240 undergoes spontaneous fission as a secondary decay mode at a small but significant rate. The presence of Pu-240 limits the plutonium's nuclear bomb potential because the neutron flux from spontaneous fission, initiates the chain reaction prematurely and reduces the bomb's power by exploding the core before full implosion is reached. Plutonium consisting of more than about 90% Pu-239 is called weapons-grade plutonium; plutonium from spent nuclear fuel from commercial power reactors generally contains at least 20% Pu-240 and is called reactor-grade plutonium. However, modern nuclear weapons use fusion boosting which mitigates the predetonation problem; if the pit can generate a nuclear weapon yield of even a fraction of a kiloton, which is enough to start deuterium-tritium fusion, the resulting burst of neutrons will fission enough plutonium to ensure a yield of tens of kilotons.\n\nPu-240 contamination is the reason plutonium weapons must use the implosion method. Theoretically, pure Pu-239 could be used in a gun-type nuclear weapon, but achieving this level of purity is prohibitively difficult. Pu-240 contamination has proven a mixed blessing to nuclear weapons design. While it created delays and headaches during the Manhattan Project because of the need to develop implosion technology, those very same difficulties are currently a barrier to nuclear proliferation. Implosion devices are also inherently more efficient and less prone toward accidental detonation than are gun-type weapons.\n\n\nZ(p) N(n) \nisotopic mass (u)\nhalf-life decay\nmode(s)[11][n 1]\nisotope(s)[n 2]\n(mole fraction)\nrange of natural\n(mole fraction)\nexcitation energy\n228Pu 94 134 228.03874(3) 1.1(+20-5) s α (99.9%) 224U 0+\nβ+ (.1%) 228Np\n229Pu 94 135 229.04015(6) 120(50) s α 225U 3/2+#\n230Pu 94 136 230.039650(16) 1.70(17) min α 226U 0+\nβ+ (rare) 230Np\n231Pu 94 137 231.041101(28) 8.6(5) min β+ 231Np 3/2+#\nα (rare) 227U\n232Pu 94 138 232.041187(19) 33.7(5) min EC (89%) 232Np 0+\nα (11%) 228U\n233Pu 94 139 233.04300(5) 20.9(4) min β+ (99.88%) 233Np 5/2+#\nα (.12%) 229U\n234Pu 94 140 234.043317(7) 8.8(1) h EC (94%) 234Np 0+\nα (6%) 230U\n235Pu 94 141 235.045286(22) 25.3(5) min β+ (99.99%) 235Np (5/2+)\nα (.0027%) 231U\n236Pu 94 142 236.0460580(24) 2.858(8) a α 232U 0+\nSF (1.37×10−7%) (various)\nCD (2×10−12%) 208Pb\nβ+β+ (rare) 236U\n237Pu 94 143 237.0484097(24) 45.2(1) d EC 237Np 7/2-\nα (.0042%) 233U\n237m1Pu 145.544(10) keV 180(20) ms IT 237Pu 1/2+\n237m2Pu 2900(250) keV 1.1(1) µs\n238Pu 94 144 238.0495599(20) 87.7(1) a α 234U 0+\nSF (1.9×10−7%) (various)\nCD (1.4×10−14%) 206Hg\nCD (6×10−15%) 180Yb\n239Pu[n 3][n 4] 94 145 239.0521634(20) 2.411(3)×104 a α 235U 1/2+\nSF (3.1×10−10%) (various)\n239m1Pu 391.584(3) keV 193(4) ns 7/2-\n239m2Pu 3100(200) keV 7.5(10) µs (5/2+)\n240Pu 94 146 240.0538135(20) 6,561(7) a α 236U 0+\nSF (5.7×10−6%) (various)\nCD (1.3×10−13%) 206Hg\n241Pu[n 3] 94 147 241.0568515(20) 14.290(6) a β- (99.99%) 241Am 5/2+\nα (.00245%) 237U\nSF (2.4×10−14%) (various)\n241m1Pu 161.6(1) keV 0.88(5) µs 1/2+\n241m2Pu 2200(200) keV 21(3) µs\n242Pu 94 148 242.0587426(20) 3.75(2)×105 a α 238U 0+\nSF (5.5×10−4%) (various)\n243Pu[n 3] 94 149 243.062003(3) 4.956(3) h β- 243Am 7/2+\n243mPu 383.6(4) keV 330(30) ns (1/2+)\n244Pu[n 5] 94 150 244.064204(5) 8.00(9)×107 a α (99.88%) 240U 0+ Trace\nSF (.123%) (various)\nβ-β- (7.3×10−9%) 244Cm\n245Pu 94 151 245.067747(15) 10.5(1) h β- 245Am (9/2-)\n246Pu 94 152 246.070205(16) 10.84(2) d β- 246mAm 0+\n247Pu 94 153 247.07407(32)# 2.27(23) d β- 247Am 1/2+#\n 1. ^ Abbreviations:\n CD: Cluster decay\n EC: Electron capture\n IT: Isomeric transition\n SF: Spontaneous fission\n 2. ^ Bold for stable isotopes\n 3. ^ a b c Fissile nuclide\n 4. ^ Most useful isotope for nuclear weapons\n 5. ^ Primordial radionuclide\n\n\n\n\n 6. ^\n 9. ^ National Nuclear Data Center Interactive Chart of Nuclides\n 10. ^ Miner 1968, p. 541\n 11. ^\nIsotopes of neptunium Isotopes of plutonium Isotopes of americium\nTable of nuclides"
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questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 1,
"style": "rule"
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"answer_type": "categorical",
"index": 1,
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"text": "Starting a business specializing in portraiture\n\nStarted 11 months ago | Discussions thread\nVeteran MemberPosts: 6,143Gear list\nRe: Definitions please\nIn reply to tcg550, 11 months ago\n\nDoes the story have a happy ending? Depends where the story ends,huh?\n\nSee, the answer isn't a simple YES or NO.\n\nThe term profit is very very very broadly defined here - so to illustrate the differences in what one might consider profit I did some SIMPLE MATH.\n\nYou seem to want a simple second grade answer to things. And it's not that simple, not by a long shot.\n\nLet me BOLD it for you.\n\ntcg550 wrote:\n\nPenguinPhotoCo wrote:\n\ntcg550 wrote:\n\nCan you answer one question without some poor analogy?\n\nDoes profit always mean cash? Yes or no?\n\nAnd for bonus points can a part time photographer turn a profit? Yes or no?\n\nPerhaps you mean GAIN, as opposed to PROFIT.\n\nIf you have a camera and $12 today, work 100 hours shooting models and at the end of the month you have $35 you have GAINED $23. Most would strongly argue you have not made a profit though, as your time has value.\n\nCan a part timer make a profit? Maybe.\n\nA lot depends on your you account for everything. I can have sales of $80,000 and the IRS paperwork says the business lost money - yet I paid bills, went on vacation, bought a car, etc.\n\nThe best way IMO is to look at cashflow - not depreciation and home office expenses, etc. Because bottom line, if you have negative cashflow the business won't be around for long.\n\nSo what are you CASH expenses? Mine (per year) - Insurance $850, biz license $25, CC machine/account $240 check scanner $600, godaddy $80 I think, phone $250, satelite radio for the studio $200 (ballpark). If I shoot nothing, advertise nothing, I have to pay those bills.\n\nI have no debt and own my camera and computer. I work from home so have internet anyway. So $2250.\n\nIf I just wait for the phone to ring and email them the files there would be no other costs.\n\nLets assume my marketing is FB and it spend an hour a week. I spend an hour a month, on average, on my website. So ~60 hours a year labor.\n\nI shoot 4 seniors at what, $250 each? Each takes 4 hours with editing - 16 hours.\n\nI shoot 2 weddings, 20 hours w/ meetings, prep, travel, shoot, editing at $1200 each.\n\nSo SALES for the year are $3400. My expenses $2250. PROFIT! Nope, not profit. Not yet.\n\nI've not accounted for all the costs yet - I worked 116 hours to earn that $3400. But I didn't EARN 3400 did I? I earned $1150.\n\nNow what is my time worth? $10/hour? Then the business LOST $10. 116 hours at $10 is $1160...\n\nNow if I\"m paying myself $9/ hour then yes, the business made a profit.\n\nBut the IRS accounts all this a bit differently. They let you deduct a portion of your house' costs (utilities, taxes, repairs) since you used a portion of your house for the biz. You get to right off the miles you drove for the business too. So these may well add to $4,000 in additional deductions.\n\nNow your business lost money - $3400 sales, -2250 expenses, -4000 expenses you have a loss of $2850. So no, you did NOT make a profit.\n\nIMO you made money, albeit not much, but yes, you can say you made a profit.\n\nYour investment (money spent on gear, education, computers, etc) returned nothing. These days with interest rates at tenths of a percent that may be OK. But if you spent $10,000 to get camera, lens, flash, computer, ignoring the depreciation and only looking at the CASH value you may have done worse than if you buried the money in a can in the yard.\n\nI know the computer I'm tying this at cost $1000. I know I paid $3200 for my 5D3. I know I can't get that much for either one used. Their value lies is in being used as tools to deliver products and services.\n\nBut if you do the math - is all the work and aggravation and education worth $9/hour? If MONEY is what you want or need you can make more waiting tables in most any restaurant.\n\n-- hide signature --\n\n\nI'm sorry was there a yes or a no in there somewhere?\n\n-- hide signature --\n\n\n PenguinPhotoCo's gear list:PenguinPhotoCo's gear list\nReply Reply with quote Complain\nPost (hide subjects)Posted by\nKeyboard shortcuts:\nColor scheme? Blue / Yellow"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 2,
"style": "rule"
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"answer_type": "categorical",
"index": 1,
"split": "train",
"text": "Starting a business specializing in portraiture\n\nStarted 11 months ago | Discussions thread\nVeteran MemberPosts: 6,143Gear list\nRe: Definitions please\nIn reply to tcg550, 11 months ago\n\nDoes the story have a happy ending? Depends where the story ends,huh?\n\nSee, the answer isn't a simple YES or NO.\n\nThe term profit is very very very broadly defined here - so to illustrate the differences in what one might consider profit I did some SIMPLE MATH.\n\nYou seem to want a simple second grade answer to things. And it's not that simple, not by a long shot.\n\nLet me BOLD it for you.\n\ntcg550 wrote:\n\nPenguinPhotoCo wrote:\n\ntcg550 wrote:\n\nCan you answer one question without some poor analogy?\n\nDoes profit always mean cash? Yes or no?\n\nAnd for bonus points can a part time photographer turn a profit? Yes or no?\n\nPerhaps you mean GAIN, as opposed to PROFIT.\n\nIf you have a camera and $12 today, work 100 hours shooting models and at the end of the month you have $35 you have GAINED $23. Most would strongly argue you have not made a profit though, as your time has value.\n\nCan a part timer make a profit? Maybe.\n\nA lot depends on your you account for everything. I can have sales of $80,000 and the IRS paperwork says the business lost money - yet I paid bills, went on vacation, bought a car, etc.\n\nThe best way IMO is to look at cashflow - not depreciation and home office expenses, etc. Because bottom line, if you have negative cashflow the business won't be around for long.\n\nSo what are you CASH expenses? Mine (per year) - Insurance $850, biz license $25, CC machine/account $240 check scanner $600, godaddy $80 I think, phone $250, satelite radio for the studio $200 (ballpark). If I shoot nothing, advertise nothing, I have to pay those bills.\n\nI have no debt and own my camera and computer. I work from home so have internet anyway. So $2250.\n\nIf I just wait for the phone to ring and email them the files there would be no other costs.\n\nLets assume my marketing is FB and it spend an hour a week. I spend an hour a month, on average, on my website. So ~60 hours a year labor.\n\nI shoot 4 seniors at what, $250 each? Each takes 4 hours with editing - 16 hours.\n\nI shoot 2 weddings, 20 hours w/ meetings, prep, travel, shoot, editing at $1200 each.\n\nSo SALES for the year are $3400. My expenses $2250. PROFIT! Nope, not profit. Not yet.\n\nI've not accounted for all the costs yet - I worked 116 hours to earn that $3400. But I didn't EARN 3400 did I? I earned $1150.\n\nNow what is my time worth? $10/hour? Then the business LOST $10. 116 hours at $10 is $1160...\n\nNow if I\"m paying myself $9/ hour then yes, the business made a profit.\n\nBut the IRS accounts all this a bit differently. They let you deduct a portion of your house' costs (utilities, taxes, repairs) since you used a portion of your house for the biz. You get to right off the miles you drove for the business too. So these may well add to $4,000 in additional deductions.\n\nNow your business lost money - $3400 sales, -2250 expenses, -4000 expenses you have a loss of $2850. So no, you did NOT make a profit.\n\nIMO you made money, albeit not much, but yes, you can say you made a profit.\n\nYour investment (money spent on gear, education, computers, etc) returned nothing. These days with interest rates at tenths of a percent that may be OK. But if you spent $10,000 to get camera, lens, flash, computer, ignoring the depreciation and only looking at the CASH value you may have done worse than if you buried the money in a can in the yard.\n\nI know the computer I'm tying this at cost $1000. I know I paid $3200 for my 5D3. I know I can't get that much for either one used. Their value lies is in being used as tools to deliver products and services.\n\nBut if you do the math - is all the work and aggravation and education worth $9/hour? If MONEY is what you want or need you can make more waiting tables in most any restaurant.\n\n-- hide signature --\n\n\nI'm sorry was there a yes or a no in there somewhere?\n\n-- hide signature --\n\n\n PenguinPhotoCo's gear list:PenguinPhotoCo's gear list\nReply Reply with quote Complain\nPost (hide subjects)Posted by\nKeyboard shortcuts:\nColor scheme? Blue / Yellow"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 3,
"style": "rule"
} | {
"answer_type": "categorical",
"index": 1,
"split": "train",
"text": "Starting a business specializing in portraiture\n\nStarted 11 months ago | Discussions thread\nVeteran MemberPosts: 6,143Gear list\nRe: Definitions please\nIn reply to tcg550, 11 months ago\n\nDoes the story have a happy ending? Depends where the story ends,huh?\n\nSee, the answer isn't a simple YES or NO.\n\nThe term profit is very very very broadly defined here - so to illustrate the differences in what one might consider profit I did some SIMPLE MATH.\n\nYou seem to want a simple second grade answer to things. And it's not that simple, not by a long shot.\n\nLet me BOLD it for you.\n\ntcg550 wrote:\n\nPenguinPhotoCo wrote:\n\ntcg550 wrote:\n\nCan you answer one question without some poor analogy?\n\nDoes profit always mean cash? Yes or no?\n\nAnd for bonus points can a part time photographer turn a profit? Yes or no?\n\nPerhaps you mean GAIN, as opposed to PROFIT.\n\nIf you have a camera and $12 today, work 100 hours shooting models and at the end of the month you have $35 you have GAINED $23. Most would strongly argue you have not made a profit though, as your time has value.\n\nCan a part timer make a profit? Maybe.\n\nA lot depends on your you account for everything. I can have sales of $80,000 and the IRS paperwork says the business lost money - yet I paid bills, went on vacation, bought a car, etc.\n\nThe best way IMO is to look at cashflow - not depreciation and home office expenses, etc. Because bottom line, if you have negative cashflow the business won't be around for long.\n\nSo what are you CASH expenses? Mine (per year) - Insurance $850, biz license $25, CC machine/account $240 check scanner $600, godaddy $80 I think, phone $250, satelite radio for the studio $200 (ballpark). If I shoot nothing, advertise nothing, I have to pay those bills.\n\nI have no debt and own my camera and computer. I work from home so have internet anyway. So $2250.\n\nIf I just wait for the phone to ring and email them the files there would be no other costs.\n\nLets assume my marketing is FB and it spend an hour a week. I spend an hour a month, on average, on my website. So ~60 hours a year labor.\n\nI shoot 4 seniors at what, $250 each? Each takes 4 hours with editing - 16 hours.\n\nI shoot 2 weddings, 20 hours w/ meetings, prep, travel, shoot, editing at $1200 each.\n\nSo SALES for the year are $3400. My expenses $2250. PROFIT! Nope, not profit. Not yet.\n\nI've not accounted for all the costs yet - I worked 116 hours to earn that $3400. But I didn't EARN 3400 did I? I earned $1150.\n\nNow what is my time worth? $10/hour? Then the business LOST $10. 116 hours at $10 is $1160...\n\nNow if I\"m paying myself $9/ hour then yes, the business made a profit.\n\nBut the IRS accounts all this a bit differently. They let you deduct a portion of your house' costs (utilities, taxes, repairs) since you used a portion of your house for the biz. You get to right off the miles you drove for the business too. So these may well add to $4,000 in additional deductions.\n\nNow your business lost money - $3400 sales, -2250 expenses, -4000 expenses you have a loss of $2850. So no, you did NOT make a profit.\n\nIMO you made money, albeit not much, but yes, you can say you made a profit.\n\nYour investment (money spent on gear, education, computers, etc) returned nothing. These days with interest rates at tenths of a percent that may be OK. But if you spent $10,000 to get camera, lens, flash, computer, ignoring the depreciation and only looking at the CASH value you may have done worse than if you buried the money in a can in the yard.\n\nI know the computer I'm tying this at cost $1000. I know I paid $3200 for my 5D3. I know I can't get that much for either one used. Their value lies is in being used as tools to deliver products and services.\n\nBut if you do the math - is all the work and aggravation and education worth $9/hour? If MONEY is what you want or need you can make more waiting tables in most any restaurant.\n\n-- hide signature --\n\n\nI'm sorry was there a yes or a no in there somewhere?\n\n-- hide signature --\n\n\n PenguinPhotoCo's gear list:PenguinPhotoCo's gear list\nReply Reply with quote Complain\nPost (hide subjects)Posted by\nKeyboard shortcuts:\nColor scheme? Blue / Yellow"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 1,
"style": "rule"
} | {
"answer_type": "categorical",
"index": 2,
"split": "train",
"text": "Skip site navigation (1) Skip section navigation (2)\n\nRe: slow result\n\nSubject: Re: slow result\nDate: 2007-01-23 14:43:35\nMessage-ID: (view raw or flat)\nLists: pgsql-performance\nAt 07:34 AM 1/23/2007, Laurent Manchon wrote:\n>on a table with 800000 rows:\n\n1= Upgrade to the latest stable version of pg. That would be \n8.2.x You are very much in the Dark Ages pg version wise.\npg 8.x has significant IO enhancements. Especially compared to 7.4.\n\n>select count(*)from tbl;\n>PostgreSQL return result in 28 sec every time.\n\n2= pg actually counts how many rows there are in a table. MS-SQL \nlooks up a count value from a internal data table... ....which can be \nwrong in extraordinarily rare circumstances in a MVCC DBMS (which \nMS-SQL is !not!. MS-SQL uses the older hierarchical locking strategy \nfor data protection.)\nSince pg actually scans the table for the count, pg's count will \nalways be correct. No matter what.\n\nSince MS-SQL does not use MVCC, it does not have to worry about the \ncorner MVCC cases that pg does.\nOTOH, MVCC _greatly_ reduces the number of cases where one \ntransaction can block another compared to the locking strategy used in MS-SQL.\nThis means in real day to day operation, pg is very likely to handle \nOLTP loads and heavy loads better than MS-SQL will.\n\nIn addition, MS-SQL is a traditional Codd & Date table oriented \nDBMS. pg is an object oriented DBMS.\n\nTwo very different products with very different considerations and \ngoals (and initially designed at very different times historically.)\n\nCompare them under real loads using real queries if you are going to \ncompare them. Comparing pg and MS-SQL using \"fluff\" queries like \ncount(*) is both misleading and a waste of effort.\n\n>My server is a DELL PowerEdge 2600 with bi-processor Xeon at 3.2 Ghz\n>with 3GBytes RAM\n>My PostgreSQL Conf is\n>log_connections = yes\n>syslog = 2\n>effective_cache_size = 50000\n>sort_mem = 10000\n>max_connections = 200\n>shared_buffers = 3000\n>vacuum_mem = 32000\n>wal_buffers = 8\n>max_fsm_pages = 2000\n>max_fsm_relations = 100\n>Can you tell me is there a way to enhence performance ?\nThere are extensive FAQs on what the above values should be for \npg. The lore is very different for pg 8.x vs pg 7.x\n\n>Thank you\nYou're welcome.\n\nRon Peacetree\n\nIn response to\n\n • slow result at 2007-01-23 12:34:19 from Laurent Manchon\n\npgsql-performance by date\n\nNext:From: Merlin MoncureDate: 2007-01-23 16:05:51\nSubject: Re: extract(field from timestamp) vs date dimension\nPrevious:From: Bill MoranDate: 2007-01-23 13:53:25\nSubject: Re: slow result\n\nPrivacy Policy | About PostgreSQL\nCopyright © 1996-2014 The PostgreSQL Global Development Group"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 2,
"style": "rule"
} | {
"answer_type": "categorical",
"index": 2,
"split": "train",
"text": "Skip site navigation (1) Skip section navigation (2)\n\nRe: slow result\n\nSubject: Re: slow result\nDate: 2007-01-23 14:43:35\nMessage-ID: (view raw or flat)\nLists: pgsql-performance\nAt 07:34 AM 1/23/2007, Laurent Manchon wrote:\n>on a table with 800000 rows:\n\n1= Upgrade to the latest stable version of pg. That would be \n8.2.x You are very much in the Dark Ages pg version wise.\npg 8.x has significant IO enhancements. Especially compared to 7.4.\n\n>select count(*)from tbl;\n>PostgreSQL return result in 28 sec every time.\n\n2= pg actually counts how many rows there are in a table. MS-SQL \nlooks up a count value from a internal data table... ....which can be \nwrong in extraordinarily rare circumstances in a MVCC DBMS (which \nMS-SQL is !not!. MS-SQL uses the older hierarchical locking strategy \nfor data protection.)\nSince pg actually scans the table for the count, pg's count will \nalways be correct. No matter what.\n\nSince MS-SQL does not use MVCC, it does not have to worry about the \ncorner MVCC cases that pg does.\nOTOH, MVCC _greatly_ reduces the number of cases where one \ntransaction can block another compared to the locking strategy used in MS-SQL.\nThis means in real day to day operation, pg is very likely to handle \nOLTP loads and heavy loads better than MS-SQL will.\n\nIn addition, MS-SQL is a traditional Codd & Date table oriented \nDBMS. pg is an object oriented DBMS.\n\nTwo very different products with very different considerations and \ngoals (and initially designed at very different times historically.)\n\nCompare them under real loads using real queries if you are going to \ncompare them. Comparing pg and MS-SQL using \"fluff\" queries like \ncount(*) is both misleading and a waste of effort.\n\n>My server is a DELL PowerEdge 2600 with bi-processor Xeon at 3.2 Ghz\n>with 3GBytes RAM\n>My PostgreSQL Conf is\n>log_connections = yes\n>syslog = 2\n>effective_cache_size = 50000\n>sort_mem = 10000\n>max_connections = 200\n>shared_buffers = 3000\n>vacuum_mem = 32000\n>wal_buffers = 8\n>max_fsm_pages = 2000\n>max_fsm_relations = 100\n>Can you tell me is there a way to enhence performance ?\nThere are extensive FAQs on what the above values should be for \npg. The lore is very different for pg 8.x vs pg 7.x\n\n>Thank you\nYou're welcome.\n\nRon Peacetree\n\nIn response to\n\n • slow result at 2007-01-23 12:34:19 from Laurent Manchon\n\npgsql-performance by date\n\nNext:From: Merlin MoncureDate: 2007-01-23 16:05:51\nSubject: Re: extract(field from timestamp) vs date dimension\nPrevious:From: Bill MoranDate: 2007-01-23 13:53:25\nSubject: Re: slow result\n\nPrivacy Policy | About PostgreSQL\nCopyright © 1996-2014 The PostgreSQL Global Development Group"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 3,
"style": "rule"
} | {
"answer_type": "categorical",
"index": 2,
"split": "train",
"text": "Skip site navigation (1) Skip section navigation (2)\n\nRe: slow result\n\nSubject: Re: slow result\nDate: 2007-01-23 14:43:35\nMessage-ID: (view raw or flat)\nLists: pgsql-performance\nAt 07:34 AM 1/23/2007, Laurent Manchon wrote:\n>on a table with 800000 rows:\n\n1= Upgrade to the latest stable version of pg. That would be \n8.2.x You are very much in the Dark Ages pg version wise.\npg 8.x has significant IO enhancements. Especially compared to 7.4.\n\n>select count(*)from tbl;\n>PostgreSQL return result in 28 sec every time.\n\n2= pg actually counts how many rows there are in a table. MS-SQL \nlooks up a count value from a internal data table... ....which can be \nwrong in extraordinarily rare circumstances in a MVCC DBMS (which \nMS-SQL is !not!. MS-SQL uses the older hierarchical locking strategy \nfor data protection.)\nSince pg actually scans the table for the count, pg's count will \nalways be correct. No matter what.\n\nSince MS-SQL does not use MVCC, it does not have to worry about the \ncorner MVCC cases that pg does.\nOTOH, MVCC _greatly_ reduces the number of cases where one \ntransaction can block another compared to the locking strategy used in MS-SQL.\nThis means in real day to day operation, pg is very likely to handle \nOLTP loads and heavy loads better than MS-SQL will.\n\nIn addition, MS-SQL is a traditional Codd & Date table oriented \nDBMS. pg is an object oriented DBMS.\n\nTwo very different products with very different considerations and \ngoals (and initially designed at very different times historically.)\n\nCompare them under real loads using real queries if you are going to \ncompare them. Comparing pg and MS-SQL using \"fluff\" queries like \ncount(*) is both misleading and a waste of effort.\n\n>My server is a DELL PowerEdge 2600 with bi-processor Xeon at 3.2 Ghz\n>with 3GBytes RAM\n>My PostgreSQL Conf is\n>log_connections = yes\n>syslog = 2\n>effective_cache_size = 50000\n>sort_mem = 10000\n>max_connections = 200\n>shared_buffers = 3000\n>vacuum_mem = 32000\n>wal_buffers = 8\n>max_fsm_pages = 2000\n>max_fsm_relations = 100\n>Can you tell me is there a way to enhence performance ?\nThere are extensive FAQs on what the above values should be for \npg. The lore is very different for pg 8.x vs pg 7.x\n\n>Thank you\nYou're welcome.\n\nRon Peacetree\n\nIn response to\n\n • slow result at 2007-01-23 12:34:19 from Laurent Manchon\n\npgsql-performance by date\n\nNext:From: Merlin MoncureDate: 2007-01-23 16:05:51\nSubject: Re: extract(field from timestamp) vs date dimension\nPrevious:From: Bill MoranDate: 2007-01-23 13:53:25\nSubject: Re: slow result\n\nPrivacy Policy | About PostgreSQL\nCopyright © 1996-2014 The PostgreSQL Global Development Group"
} |
questioner_given_difficulty_id | [
{
"content": "Your task is to generate a single self-contained question and its correct answer inspired by the given document.\nThe question must strictly satisfy both the difficulty level and the answer_type constraints.\n\nYou must output exactly one JSON object as specified below. \nAll reasoning MUST be pl... | general | {
"ground_truth": 1,
"style": "rule"
} | {
"answer_type": "categorical",
"index": 3,
"split": "train",
"text": "Take the 2-minute tour ×\n\nI need enable TCP connections to my system, for use graphical applications in marionnet, network simulation system, in debian squeeze.\n\nIn older versions of debian it is achieved with System|Administration|Login Window -> uncheck “Deny TCP connections to the Xserver”. but in squeeze I have no idea.\n\n\nEDIT: I have the answer: take a look here\n\nshare|improve this question\n\n1 Answer 1\n\nThe recommended way to execute GUI applications is over an SSH connection. Install an ssh server (openssh-server package) on your system. Run ssh -X or put ForwardX11 yes in ~/.ssh/config on the client side.\n\nshare|improve this answer\nAnd do you think that works for my specific case(marionnet)? – rendon Nov 3 '11 at 0:21\n@D.D.C I'd never heard of marionnet until now, but I don't see why not. If you have trouble with it, feel free to ask questions here (but I recommend giving more information, since it's not a very common program). – Gilles Nov 3 '11 at 0:29\nMarionnet(marionnet.org) is a network simulation system, by each pc it runs a virtual machine(gnu/linux OS), then a command line prompt is shown exactly like a normal pc running gnu/linux, all command line programs works fine but if I wanna run a graphical app it fails with a message like this: Gtk-WARNING **: cannot open display:'. – rendon Nov 3 '11 at 1:00\n\nYour Answer\n\n\n"
} |
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