Consider a patient who swallows a radiopharmaceutical that utilizes phosphorus32 32 15p , a β − emitter with a half-life of 14.3 days. the average kinetic energy of the emitted electrons is 720 kev. if the initial sample contained 1.46 × 1014 atoms, find the number of decays that occur in a 15-day period. answer in units of decays.
find the total energy of the radiation emitted during the 15 days. answer in units of j
find the absorbed dose if the electrons are completely absorbed in the target tissue which has a mass of 92 g. answer in units of gy.

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.