Calculate the amount of work input a freezer needs to make ice cubes out of a tray of 0.25 kg liquid water at 10°c. assume the freezer works in a carnot cycle between −8°c and 35°c with a motor-compressor of 600 w. how much time does it take if this is the only cooling load?

Fluids at rest possess no flow energy. a)- true b)- false

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Inadequate stores control is not an obstacle to effective work order system. (clo4) a)-true b)-false