Liquid water flows through a circular pipe with diameter 0.033324 m and length 5 m at a flowrate of 0.369442 kg/s. The pipe is at a constant temperature of 45.7316 °C. The water enters the pipe at a temperature of 20 °C and exits at 37.6988 °C. If the heat transfer coefficient is constant along the length of the pipe, what is its value? (Answer in units of W/m2•K.) (Consider the properties of water as constant corresponding to the average of the inlet and outlet temperature.)

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency

To save energy, the air supply to a 2000 ft office has been shut off overnight and the room temperature has dropped to 40°f. in the morning, the thermostat is reset to 70°f and warm air at 120 f begins to flov in at 200ft'/min. the air is well mixed within the room, and an equal mass flow of air at room temperature (changing with time) is withdrawn through a return duct. the air pressure is nearly 1 atm everywhere. ignoring heat transfer with the surroundings and kinetic and potential energy effects, estimate how long it takes for the room temperature to reach 70°f. plot the room temperature as a function of time.