The surface of a 50-mm-diameter, thin-walled tube is maintained at 100 degrees celsius. in one case air is in cross flow over the tube with a temperature of 25 degrees celsius and a velocity of 30 m/s. in another case air is in fully developed flow through the tube with a temperature of 25 degrees celsius and a mean velocity of 30m/s. compare the heat flux from the tube to the air for the two cases

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

Why do astronauts in the space shuttle weigh less?