Write an expression for the shear stress in the screw at an arbitrary (x, y) location. Write your answer in terms of torsion T, x, and y. b) Identify the location on the screw where the shear stress is a maximum. c) For a titanium screw, what is the maximum torque T that can be applied before yielding if a safety factor of 1.5 is used? Use the von Mises criterion

Refrigerant-134a enters the compressor of a refrigerator as superheated vapor at 0.14 mpa and -10°c at a rate of 0.05 ka/s and leaves at 0.8 mpa and 50°c. the refrigerant is cooied in the condenser to 0.72 mpa and 26'c. it is then throttled to 0.15 mpa. sketch the t-s diagram for the system and evaluate: 6) the rate of heat removai from the refrigerated space (kw), it) the power input to the compressor (kw), ii) the isentropic efficiency of the compressor (%), and iv) the cop of the refrigerator.