Two rocks are found that have different ratios R' of 238U to 206Pb: R' = 0.76 and 3.1. What are the ages of the two rocks? Did they likely have the same origin?
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Two rocks are found that have different ratios R' of 238U to 206Pb: R' = 0.76 and 3.1. What are the ages of the two rocks? Did they likely have the same origin?
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- A pure carbon archaeological artefact has an age of 22458 years and emits 15 electrons per minute. Find the activity of the artefact at the time it was made. Assume that the half-life of 14C is 5730 years.The question is attached below as a image!The only two stable nuclides with more protons than neutrons are 11H and 32He. Why is Z 7 N so uncommon?
- 39.8 An atom of uranium-235 (atomic mass: m(23U) cays to thorium-231 (atomic mass: 231. 00 Th) = 231.03630 u) emission of an 235.04392 u) de- 92 via the a particle (nuclear 4.00151 u). m(ža) c = 2.998 x 108 m s-1. mass: Use %D (a) What is the binding energy of an 235U nucleus (in J)? 92 (b) What is the binding energy of a 231 Th nucleus (in J)? 90 (c) What is the binding energy of an a particle (in J)? (d) What is the maximum possible ki- netic energy (in J) of the a particle emitted during this decay? (Hint: what is the difference between the mass of 23°U and the total mass of 92 231 Th and an a particle?) 90 (e) Whatis the maximum velocity of the emitted a particle?i can confirm answer 5118 years is wrongA sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. Suppose 100 atoms of 14C are found for every 1.0 * 1015 atoms of 12C in the sample. What is the wood’s age?
- A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. Suppose 150 atoms of 14C are found for every 1.4×1015 atoms of 12C in the sample. What is the wood's age? Express your answer in years.Calculate BE/A for 12C . Stable and relatively tightly bound, this nuclide is most of natural carbon.1) Complete the reaction: 242Am + ? n → 90Sr + 149La + 4n a) n b) 2n c) 3n d) 4n e) 5n 2) Calculate the energy (in MeV) released in the nuclear fission reaction. The atomic masses are 242Am = 242.059549 u, 90Sr = 89.9077387 u, and 149La = 148.934733 u. (Express your answer to six significant figures).
- Find the energy released in the alpha decay of 22688Ra (226.025402 u). (Hint: 22286Rn has a mass of 222.017571 u.)If 232Th (half-life 1.4 × 1010 years) and 238U (half-life 4.5 × 109years) werepresent in equal amounts when the earth was formed, calculate their relative abundance atpresent. Note: The age of the earth is 4.54 billion years. NTh(t)/NU(t)= ?Please help me with the following question and pls make sure its correct 100% its important, thanks Question: Answer the following question and be sure to review Example 30.4 before attempting these problems. Part A. A 11,460-year-old archeological specimen has a 14C activity of 6.5×10−2 Bq. What is the carbon mass of the specimen? Express your answer with the appropriate units. ( possible in grams) Part B . A 7.0×10−2 kg tumor is treated with a high-energy proton beam. If the equivalent dose delivered to the tumor is 1900 rem, how much energy did the tumor absorb? Express your answer with the appropriate units. ( in J)