During a tensile test, the strain corresponding to a stress of 5000psi was 167uin/in. at 20,000psi, the strain was 667uin/in. a. if the proportional limit is 30,000psi, what is the modulus of elasticity (young's modulus) for the specimen being tested? b. what stress corresponds to a strain of 200uin/in? c. will the result from part b still hold if the proportional limit is 18,000psi? explain your an answer

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.