Mick drove the 1 mile distance to his place of work at 30 mph. If Mick wanted to average 60 mph on his round trip, (home to work and then back home) how fast would he have to travel on his way home? (The answer is not 90 mph)

Amplitude is a measure of a waves a; speed b; distance c; energy d; frequency

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

The heliocentric and the geocentric models of the solar system included these central principles