14.43 The spring attatched to the 0.2-kg collar has a stiffness of 220 N/m and a free length of 150 mm. If the collar isreleased from rest when x - 150 mm, determine its acceleration as a funtion of x. Neglect friction.

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