Ofcourse it has weight, it's just lighter than cold air. With that, you can make hot air balloons, because the hot/warm air inside the balloon is lighter than the cold air outside the balloon. And ofcourse warm air does have weight, because it's made out of a lot of different gasses. It has to weigh something, because air contains gasses. if you make a square the size of 1 dm^2, and you imagine a collumn all the way from the square to the end of the earths atmospere, you wil get +- 1 kg of air.
rises
They weigh the same. Both are defined in your question as a pound.
No, warm air and cold air exert different pressures due to their different densities, but the weight of a volume of air is determined by its mass. Therefore, a mass of warm air does not weigh more than a mass of cold air, assuming the volumes are the same.
When a warm air mass pushes into a cold air mass, the warm air rises because it is less dense than the cold air. As the warm air ascends, it leads to a decrease in atmospheric pressure at the surface, as the weight of the air above is reduced. This rising warm air can also create a low-pressure system, leading to cloud formation and potential precipitation. Conversely, the cold air, being denser, can create areas of higher pressure.
when the weight of warm air in the stack is less than the cool air around the stack , it causes an upward flow pulling air thru the furnace
when the weight of warm air in the stack is less than the cool air around the stack , it causes an upward flow pulling air thru the furnace
In warm air, molecules are spaced farther apart. As air cools, molecular activity and movement slows down which cause compaction of the molecules. The increased density of air in the same space automatically increases the overall weight. That is why warmer air layers over cold air because the cold air is 'heavier' and sinks to the ground while the 'lighter', warm air rises.
Down traps a lot of air, and air is a good insulator.
The cold air pushes under the warm air.
I pushes the warm air upwards.
warm air
a warm air mass is a large body of air that is extremely warm