Ocean tides exist because the Moon's pull is a
weaker than the pull of the Sun.

b
stronger on Earth's oceans than on Earth itself.

c
stronger on water closer to it than on water farther away.

d
basically non-existent at the surface of the Earth.

What occurs during a combustion reaction

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 field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?