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To cool a summer home without using a vapor-compression refrigeration cycle, air is routed through a plastic pipe (k=0.15 W/m K, Di=0.15m, Do=0.17m) that is submerged in an adjoining body of water. The water temperature is nominally at T(infinity)=17 C and a convection coefficient of ho=1500W/m^2 K is maintained at the outer surface of the pipe.
If air from the home enters the pipe at a temperature of Tm,i=29 C and volumetric flowrate of V=0.025 m^3/s, what pipe length L is needed to provide a discharge temperature of Tm,o= 21C?
find a cylindrical container that is large enough that it takes at least one minute to drain you may have to create an
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For the process where q= 62.5 kj/kg and wkcs= 60 kj/kg determine the energy change if the system mass is 2 kg.
the masses of blocks a b c and d are 9 kg 9 kg 6 kg and 7 kg respectively. knowing that a downward force of magnitude
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