A fossil specimen has a l4C decay rate of 5.0 s-1.
(a) How many carbon-14 nuclei are present? (b) If the specimen is 20,000 years old, how many carbon-14 nuclei were present when the animal died? (c) How much kinetic energy (in MeV) is released in each β decay, and what is the total amount released in all β decays since the animal died?
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