The lift on a spinning circular cylinder, in a freestream with a velocity of 10m/s, is measured as L1 at standard sea level conditions and L2 at an altitude of 10,00ft. (Assume that both cases generate the same circulation around the cylinder.) How do you compare L1 and L2?

Air at a pressure of 1atm and a temperature of 40 c is in parallel flow over the top surface of a flat plate that is heated to a uniform temperature of 120 c. the plate has a length of 0.40m (in the flow direction) and a width of 0.15m. the reynolds number based on the plate length is 50, 000. what is the rate of heat transfer from the plate to the air? if the free stream velocity of the air is doubled and the pressure is increased to 10 atm what is the rate of heat transfer?