A 30.0-kg child receives 2.65 *107 particles, each with an energy of 4.60 *10¯13 J. If the RBE = 0.78, how many millirem did the child receive?
A) 3.2 *10¯7
B) 5.2*10¯7
C) 5.2* 10¯4
D) 3.2 * 10¯2
E) None of these choices is correct.
Correct Answer:
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