Calculate the age of the Shroud of Turin given that the amount of ¹4C found in it is 92% of that in living tissue.
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- The mass of a sample is 0.91 u. What is its mass in MeV/c2?A state-of-the-art proton decay experiment is expected to detect 47% of the proton decays in a body of water. Assuming protons have a lifetime of 1031 years, how many m3 of water would you need in order to see 6 decays per month? (Assume a "month" is one-twelfth of a year.)On absorption of a single neutron, plutonium Pu-239 can undergo fission into xenon Xe-134 plus zirconium Zr-103 plus three neutrons. The masses of these nuclei are, mpu-239 = 239.052 amu, mxe-134 = 133.905 amu, and mzr-103 = 102.927 amu. Calculate the energy given off in this nuclear reaction.
- The energy yield of a nuclear weapon is often defined in terms of the equivalent mass of a conventional explosive. 1 ton of a conventional explosive releases 4.2 GJ. A typical nuclear warhead releases 250,000 times more, so the yield is expressed as 250 kilotons. That is a staggering explosion, but the asteroid impact that wiped out the dinosaurs was significantly greater. Assume that the asteroid was a sphere 10 km in diameter, with a density of 2500 kg/m3 and moving at 30 km/s. What energy was released at impact, in joules and in kilotons?Learning Goal: Radioactive decay - Half-life N 1,000,000 500,000 250,000 125,000 62,500 Number of nuclides, N x 10³ 1000 750 500 250 125 0 Time 0 the 2012 3h2 4112 5h2 612 7h2 8h2 9412 10₁2 31,250 15,625 he 2h 3h 4h 5h 6h 7he 8he 9h 10h Time in multiples of f 7,813 3,906 1,953 977 A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour = 60 min, 1 min = 60 sThe mass of a sample is 0.02 u. What is its mass in MeV/c2?