Water flows in a rectangular culvert 6.0-ft wide and 4.0-ft high. The water depth is 3.5 ft and the velocity is 8.0 ft/s. Find: The minimum headloss in 500 feet of concrete culvert. [Hints: assume fully turbulent flow; the concrete roughness is smooth for pre-cast concrete; and, note that this pipe is a rectangular conduit designed not to flow full.]

The higher the astm grain size number, the finer the gran is. a)-true b)-false

An engine runs on the ideal diesel cycle. the cycle has a compression ratio of 20 and a cutoff ratio of 2. the highest temperature in the cycle is 1200 k. if the heat into the system is 300 kj/kg of working fluid and using variable specific heats determine the work produced per mass of working fluid

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.