The force P=10 kips is applied to a bar made of steel F29000ksi, α=22(10-6)1/oF). The bar has cross- sectional areas of 1 in2 in region AB and 4 in2 in region BC. A variation in temperature AT 60°F is applied to the bar. Determine normal stress on a generic section between A and B. Make a 3D drawing showing the normal stress distribution on a generic cross section between A and B.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

How much power could a wind turbine produce if it had the following specifications? cp = 0.45 -d=1.2kg/m3 d=50m v 5m/s

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.