An engineer would like to create a new set of office supplies that are 100% recyclable. They will include staplers, pens, paper organizers, and computers. He would like to have preset molds to make just the frames of these items in mass bulk. Which of the following materials would be a good choice to begin exploring this project? ceramics

metals

wood

glass

Derive the correction factor formula for conical nozzle i=-(1+ cosa) and calculate the nozzle angle correction factor for a nozzle whose divergence hal-fangle is 13 (hint: assume that all the mass flow originates at the apex of the cone.

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.

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?