The interference of two sound waves of similar amplitude but slightly different frequencies produces a loud-soft-loud oscillation we call . a. the Doppler effect
b. vibrato
c. constructive and destructive interference
d. beats

What color of light must blue light mix with to create white light? a. yellow b. white c. blue d. green

How is the gravitational force related to the distance between two objects?

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.