The steel structure is composed of a hollow tube with an outer diameter of 10 in. and a wall thickness of 0.5 in. Take ft and The steel has a uniaxial yield strength of 36 ksi. If the load F0 2500 lb, determine the factor of safety for yielding at the base, assuming a von Mises yield criterion.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.

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.