At any rate, air density decreases the higher you go up.

The air density at each deck followed the same pattern.

In addition to air density, humidity can have an effect on certain materials.

Pudding more or less described the increased air density, he thought.

We all felt a bit giddy, from changing air density, I guess.

Molecular compression was quickly developed here because of the natural air density.

Air density is perhaps the single most important factor affecting aircraft performance.

"Shouldn't we set the air density inside the box to what it was where we found him?"

This means that the higher the air pressure, the greater the air density.

Again, the fan will pump the same volume, though not mass, at any other air density.

It's that air pressure you spoke of, or air density.

In hot and high areas where air density is much lower, performance will be different, with faster descents.

These differences cause changes in air density, and hence viscosity.

The patent does not account for normally occurring differences in air density.

The values and are referred to as air density correction factors in product literature.

I don't know how to calcurate relative effects of air density on different objects.

If such tables are not used, the following equations will be required to calculate air densities.

The charge air density is increased and the temperature is reduced.

Using the former eliminates air density from the equations.

At higher altitudes, the air density is lower than at sea level.

In addition, the air density is about 100,000 times less at the altitude involved, so the heat transfer is different.

Naturally, net thrust will decrease with altitude, because of the lower air density.

During takeoff the trade-off is not so obvious, particularly in conditions of low air density.

This cooling increases air density which is the driving force for microbursts.

"Air density and temperature are consistent with what the remote probes have found.