<prompt> One gray of radiation is equal to -1 rad10 rad100 rad1000 rad  <response>: The activity of radioactive material is the number of nuclear disintegration per unit of time. SI unit of radiation exposure - coulomb per kilogram 1Roentgen 2.58x10-4 Ckg absorbed dose - Gray 1 Gray 100 rad Dose equivalent - Sieve Sv 1 Sv 100 rems Parks Textbook of Preventive and Social Medicine, 25th Edition, Pg 804 