Tests on human subjects in Boston in 1965 and 1966, following the era of atomic bomb testing, revealed average quantities of about 2 pCi (7×10−2 dis/s) of plutonium radioactivity in the average person. Suppose each disintegration produces one alpha particle. If each alpha particle deposits 8×10−13J of energy and if the average person weighs 78 kg, calculate the number of rads of radiation in 5 yr from such a level of plutonium. 1 Bq=1 disintegration/s (dps) 1 Ci=3.7×1010 Bq 1 rad=0.01 Gy, 1 Gy=1 J/(kg tissue) 1 rem=0.01 Sv, 1 Sv=1 J/kg