'Cold' air will have less volume so the density is greater.
More fresh air mixed with the gas. Better performance.
Density. You can figure out the details using the ideal gas law.
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The primary effect of heating a gas is lowering the density of the gas, making it lighter. Uneven heating of gas creates local density gradients, which will drive bulk movement of the gas via natural convection to get rid of the local density gradients.
Air has density. Warm air is less dense than cold air - and so it rises above colder air. Air is a gas and so expands to fill the space available to it, so it doesn't have 'length' or other dimension.
By increasing the density of a gas its air pressure will subsequently increase.
By increasing the density of a gas its air pressure will subsequently increase.
In layman terms, warm air rises and cold air sinks (experience that in a two-story building). Lighter objects float to the top. Therefore, warm air has a lower density than cold air. ===============================
Yes. Natural gas is mostly methane, which has about half the density of air.
It has the same density as air.
It has the same density as air.
The density of a cool gas is lower compared with the density of a hot gas; consequently the cooler gas is pulled down.