The amount of carbon-14 found in a fossil of a tree is around 0.05% when compared to fresh wood of the same kind. Estimate the age of the fossil.
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Q: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
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Q: Question 1. Tritium has a a tritium sample will remain (a) after 5.00 yr?
A: GivenHalf Life for Tritium, t1/2=12.33 years
Q: The half-life for the decay of carbon-14 is 5.73*10^3 years. Suppose the activity due to the…
A: Half life T1/2= yearsInitial activity of the sample A0=6.9 BqActivity of sample At= 1.0 Bq
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Q: Radioactive potassium-40 has a half-life of 4.2 x 1016 s. a) Calculate the decay constant of…
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- Archeologist extracted 179 gm of carbon from an animal bone from an archeological site. The carbon shows an activity of 15 decays/s. (Half-life of 146C = 5730 years, 1 year = 3.156 x 107 seconds, Avogadro's number = 6.02 x 1023 atoms/mol) (A) Total number of atoms in this carbon sample = . (B) Decay constant of 146C, λ = . (C) Number of 146C atoms in this sample = . (D) Activity of 146C at time (t = 0) = . (E) Age of the animal =A sample of radioactive material has a half-life of 12 hours. If the initial sample contained 6.2x10¹3 radioactive nuclides estimate the number of radioactive nuclides present in the sample after 5 hours.You inherit 32 kg of cesium-136 after your roommate moves out and leaves it behind. Cesium-137 has a half-life of 30 years. If you pack it in a box and forget about it, but your grandchildren finds it in the attic 90 years from now, how much of the sample is still cesium-137?
- A radioactive sample took 10 years to reach 25% of its initial amount. Estimate the half life of the material.A fossil is found that contains 6.25% as much Radium-226 as fossils being formed today. The half-life of Radium -226 is 1.60 x103 years. How old is the fossil? Hint: How many half-lives did the Radium-226 go through for 6.25% to remain? So, how many years have passed over 4 half lives?