If a 6.90 lb cat absorbs 1.90 × 10−5 KJ of radiation, how many rads did this cat absorb?

Answer 1

1 rad = 0.01 joules per kilogram of irradiated material.
(1.90*10^-5 kJ/6.90 lb)(2.2 lb/kg)(1 rad./0.01 j/kg)(1,000 J/kJ) =

0.6057971 rad.