Consider atmospheric air at 20°c and a velocity of 30 m/s flowing over both surfaces of a 1-m-long flat plate that is maintained at 130°c. determine the rate of heat transfer per unit width from the plate for values of the critical reynolds number corresponding to 105, 5 × 105, and 106

The great sandini is a 60.0-kg circus performer who is shot from a cannon (actually a spring gun). you don’t find many men of his caliber, so you him design a new gun. this new gun has a very large spring with a very small mass and a force constant of 1100 n/m that he will compress with a force of 4400 n. the inside of the gun barrel is coated with teflon, so the average friction force will be only 40.0 n during the 4.00 m he moves in the barrel. at what speed will he emerge from the end of the barrel, 2.50 m above his initial rest position?