Water flows on the inside of a steel pipe with an id of 2.5 cm. the wall thickness is 2 mm, and the convection coefficient on the inside is 500 w/m2 · ◦c. the convection coefficient on the outside is 12 w/m2 · ◦c. calculate the overall heat-transfer coefficient. what is the main determining factor for u

Física: un futbolista patea hacia el arco con una velocidad de 15m/ah, calcular: a)el alcance para un ángulo de tiro de 25? , b) el tiempo que el balón permanece en el aire.

What organization and environment is described above?

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm