jBe decays with a half-life of about 53 d. It is
Chapter 41, Problem 41.58(choose chapter or problem)
jBe decays with a half-life of about 53 d. It is producedin the upper atmosphere, and filters down onto the Earthssurface. If a plant leaf is detected to have 350 decays/s ofjBe, (a) how long do we have to wait for the decay rate todrop to 15 per second? (b) Estimate the initial mass ofjBe on the leaf.
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