A 5 meter copper tube is heated externally to 100 °C. Air heated by passing it through the 40mm diameter tube, hc=0.03375 kW/m²-K. The air enters the tube at 20°C and leaves at 88°C. Calculate the heat transfer in air, in KW.

300960 W (e) Water is entering a heated tube at mass flow rate of 1.2 kg/s. The temperature at the inlet is 20°C and at the outlet is 80°C. Assume the surface temperature of the tube is 100°C. The convection coefficient of the water flow is 28 W/m².°c. The specific heat and density of water can be assumed to be 4180 J/kg.°C and 990 kg/m³. What is the rate of heat transfer to water during this process?

There is a cylindical piece of nickel, that is 5 cm in diameter and 10 cm in length, that is initially at 20 degrees Celcius before being dropped into a hot fluid that is at 190 degrees Celcius.  Determine the amount of heat gained by the cylinder until its temperature rises to 80 degrees Celcius.  Show details in calculations and specify values retrieved from property tables.

Hot and cold liquid water are sent through a mixing chamber. The device is not insulated and the water exiting is warmer than the cold water entering. Which terms in the energy equation are not zero? (Click all that apply) Qin Win Qout Wout V Emi - Eme O APE O AKE O AEsys