The atmosphere is heated most by which of the following?
a. convection
b. radiation
c. wind
d. conduction

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

Oxygen gas enters well-insulated diffuser at 25 lbf/in.2, 420r, with a velocity of 860 ft/s through a flow area of 1.6 in.^2. at the exit, the flow area is 12 times the inlet area, and the velocity is 19 ft/s. the potential energy change from inlet to exit is negligible. assuming ideal gas behavior for the oxygen and steady-state operation of the diffuser, determine the following: (a) the exit temperature, in r(b) the exit pressure, in lbf/in.^2 (c) the mass flow rate, in lb/s