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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 2.3 Ã- 10-3 J of energy from cosmic rays in a year. What is the person's mass?

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