Aone shell and two tube type heat exchanger has an overall heat transfer coefficient of 350 btu/h · ft2 · °f. the shell side fluid has a capacity rate of 25,000 btu/h · °f, while the tube side fluid has a heat capacity rate of 50,000 btu/h · °f. the inlet temperature on the shell side and tube side are 250°f and 100°f, respectively. if the total heat transfer area is 150 ft2, determine the following: the heat transfer effectiveness. the actual heat transfer rate in the heat exchanger

Afluid flows with a velocity field given by v=(x/t)i.. determine the local and convective accelerations when x=3 and t=1.

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.

What is a monomer? how do they form a ploymer from the view point of chemical bonding?