In a geothermal power plant, the used geothermal water at 80°c enters a 15-cm-diameterhexagon and 400-m-long uninsulated pipe at a rate of 10 kg/s and leaves at 70°c beforebeing rejected back to the ground. windy air at 15°c flow over the pipe. disregardingradiation, determine the average wind speed that cools the water.

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

The dot diagram represents the motion of the motorcycle as it moves from left to right