Alcohol flows in a horizontal pipe 3.2-in diameter; the diameter of the pipe is reduced to 1.8 in. If the differential pressure between the two sections is 1.28 psi, what is the flow rate through the...

Alcohol flows in a horizontal pipe 3.2-in diameter; the diameter of the pipe is reduced to 1.8 in. If the differential pressure between the two sections is 1.28 psi, what is the flow rate through the pipe? Neglect losses.

How much heat is radiated from a surface 1.5 ft × 1.9 ft if the surface temperatures is 125°F? The air temperature is 74°F and the radiation constant for the surface is 0.19 × 10−8 BTU/h ft2 °F4?