A radioactive sample is monitored with a radiation detector to produce 7640 counts per minute. Twelve hours later, the detector reads 1410 counts per minute. 1) Calculate the decay constant of the sample. (Express your answer to two significant figures.) 2) Calculate the half-life of the sample. (Express your answer to two significant figures.)

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Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.