On a hot Saturday morning while people are working inside, the air conditioner keeps the temperature inside the building at 23degreesC. At noon the air conditioner is turned off, and the people go home. The temperature outside is a constant 34degreesC for the rest of the afternoon. If the time constant for the building is 4 hr, what will be the temperature inside the building at 3 : 00 font size decreased by 2 Upper P . font size decreased by 2 Upper M .? At 5 : 00 font size decreased by 2 Upper P . font size decreased by 2 Upper M .? When will the temperature inside the building reach 25degreesC?

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

What is the main objective of using reheat rankine cycle?

Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.