After that, when the pressure is quickly released, the gas instantly cools.

The gas had been cooling since the Big Bang.

As the gas cools, it decreases in volume, and the pressure drops.

The gas cools and it would come down.

It has long been a puzzle why this gas does not cool off, fall into the center of the cluster and make new stars.

The gas was being used to heat and cool the motel.

Since temperature IS molecular kinetic energy, this means that the gas will cool somewhat.

As the gas cools, it is pulled back into the galactic disc of the galaxy by gravitational forces.

Data from observations suggest that hot gas is cooling in the central regions at the highest rate ever recorded.

When the heated air and gases cool to the temperature of the surrounding air, it no longer rises.