In a power plant, pipes transporting superheated vapor are very common. superheated vapor flows at a rate of 0.3 kg/s inside a pipe that is of diameter 5 cm and length10 m. the pipe is located in a power plant at a temperature of 25.5°c, and has a uniform pipe surface temperature of 100°c. if the temperature drop between the inlet and exit of the pipe is 30°c and the specific heat of the vapor is 2190 j/kg·k, determine the heat transfer coefficient as a result of convection between the pipe surface and the surroundings.

Your physics assignment is to figure out a way to use electricity to launch a small 6.0-cm-long plastic drink stirrer. you decide that you'll charge the little plastic rod by rubbing it with fur, then hold it near a long, charged wire, as shown in figure p23.56 . when you let go, the electric force of the wire on the plastic rod will shoot it away. suppose you can uniformly charge the plastic stirrer to 10 nc and that the linear charge density of the long wire is 1.0 x10-7 c/m. what is the net electric force on the plastic stirrer if the end closest to the wire is 2.0 cm away?