A new waterline has a large valve that will be installed inside a vault. The vault has dimensions of 8 feet wide, 12 feet long, and 7.5 feet tall (as measured from the outside of the concrete structure).
What is the buoyancy force acting on the vault if it is installed below the groundwater level?

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.