Statement of a problem № 11221


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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