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Over a year s time, a person receives a biologically equivalent dose of 24 mrem (millirems) from cosmic rays, which consist primarily of high-energy protons bombarding earth s atmosphere from space. The relative biological effectiveness of protons is 10.
(a) What is the person s absorbed dose in rads?
(b) The person absorbs 1.9 × 10-3 J of energy from cosmic rays in a year. What is the person s mass? |
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