Which tagline from a car advertisement has the best connotative appeal to the parents of a new teenage driver?
a. advanced new safety features that get everyone home at night.
b. our sleek new style will make heads turn.
c. finally, a car as good for the planet as it is for the driver.
d. technology that lets you have your office on wheels.

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.