Solve the following problem using Mohr’s Circle (it’s the easier and better approach when parts (b) and (c) are included. The following state of strain has been measured on the surface of a thin plate:εx = +30 μ ε εy = +570 μ ε γxy = +720 μ ε Knowing that the surface of the plate is unstressed and ν= ⅓, determine:(a)The direction and magnitude of the principal strains(b)The maximum in-plane shearing strain(c)The maximum shearing strain.

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