Cold water (cp = 4.18 kj/kg·k) enters a crossflow heat exchanger at 14°c at a rate of 0.35 kg/s where it is heated by hot air (cp = 1.0 kj/kg·k) that enters the heat exchanger at 65°c at a rate of 0.8 kg/s and leaves at 25°c. determine the maximum outlet temperature of the cold water and the effectiveness of this heat exchanger.

What are chlorofluorocarbons and what impact do they have on the atmosphere?

An ice-making machine inside a refrigerator operates in a carnot cycle. it takes heat from liquid water at 0.0 degrees celsius and rejects heat to a room at a temperature of 19.2 degrees celsius. suppose that liquid water with a mass of 76.3kg at 0.0 degrees celsius is converted to ice at the same temperature. take the heat of fusion for water to be l_f = 3.34*10^5 j/kg. how much energy e must be supplied to the device? express your answer in joules.

Consider the growth of a 20-nm-diameter silicon nanowire onto a silicon wafer. the temperature of the wafer surface is maintained at 2400 k. assume the thermal conductivity of the silicon nanowire is 20 wm-1k-1 and all its surfaces including the tip are subjected to convection heat transfer with the coefficient h = 1×105 wm-2k-1 and t∞ = 8000 k. when the nanowire grows to l = 300 nm, what is the temperature of the nanowire tip (t (x =