At present, a radioactive beta source with a long half-life has an activity of 20 mCi. (a)

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At present, a radioactive beta source with a long half-life has an activity of 20 mCi.
(a) What is the present decay rate in decays per second?
(b) Assuming that one beta particle is emitted per decay, how many are currently emitted per minute?

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College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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Question Posted: Aug 29, 2015 06:08 AM

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At present, a radioactive beta source with a long half-life has an activity of 20 mCi. (a)

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