At the time 푡푡0, 5 hours after a nuclear accident on a reactor facility, the released fission products are distributed uniformly over a certain area at a density of 6.2×10-5ci/cm2. a man enters the radiation shelter (see the scheme below) at this time and remains there for 푡푡푠푠hours.

Acarnot refrigerator operates in a room in which the temperature is 21°c and of power when operating. if the food compartment of the refrigerator is consumes 3 kw to be maintained at 2°c, determine (a) the coefficient of performance of the cycle and (b) the rate of heat removal from the food compartment. refrigerator cycle that has a higher coefficient of performance than that of the discussed (e) is it possible to develop a carn ot refrigerator, operating between the same temperature limits? explain