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deda
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The hot air has less weight then the cold one.It's a fact but could it be that the hot air loses weight to gain heat?
For a long time Archimedes was occupied with that problem. Then one day he tried to take a bath. While entering the jacuzy filed to the top with water he noticed that he is spilling water out. His idea was that his body and the supressed water take same volume. This would mean that their weights are proportional with their densities for the given equal volume. But what if those weights were different? He enters the water with 80kgs measured in air but he supress only 70kgs of water. What are those 10kgs of difference? And then he jumped yeiling "Eureka" = "I found it". What he did found we know from his famous quote:"If droped in water an object loses seemingly or actually as much weight as much is the weight of the supressed water".Originally posted by Janus
It is not true that hot air has less "weight" than cold air. If you to take two equal samples of air and heat one, they would both still weigh the same.
What happens is that the air that is heated will expand and become less dense. (The molecules making up the gas will increase their distance from each other.) This warm less dense air then tends to "float" on the top of the colder denser air.
So heated air does not lose weight, it gains volume.
I wasnot referring to energy-mass conversion but their proportionality. So no SR effects can be found in my previous post.Originally posted by AHolico
To my little knowledge, this whole energy <=> mass thing is an effect of relativity. Therefore, in experiments where we are not traveling near the speed of light, we can say that energy and mass are constant (can't be created or destroyed) and that there is no transfer from one to the other (well, maybe some transfer will occur, but it will be so few that we can neglet it).
Again weight is an force proportional with mass. So in fact every phenomenon can be viewed only by cahrge, mass and distance. Those are the basic qualities of the matter.
Second, you need to learn to differenciate between mass and weight of an object. This statement still puzzles me: "But what if those weights were different? He enters the water with 80kgs measured in air but he supress only 70kgs of water." Try to define both of them, and then find the units of measure of both (Kgs is a unit of mass).
I'm ready!
After all this, try to think of it again. Maybe then we can discuss the Archimedes history, experiments and principles.
Heat can affect the weight of air in several ways. When air is heated, its molecules gain energy and move faster, causing them to spread out and become less dense. This leads to a decrease in air pressure, which can ultimately affect the weight of the air.
Yes, there is a direct relationship between heat and weight in air. As the temperature of air increases, its weight decreases. This is because the heated air molecules have more energy and move farther apart, resulting in a decrease in air density and weight.
Humidity, or the amount of water vapor in the air, can affect the relationship between heat and weight in air. Water vapor is less dense than dry air, so as humidity increases, the overall air density decreases. This can lead to a decrease in air weight and pressure.
Yes, heat can cause air to become lighter than normal. As the temperature of air increases, its density decreases, making it lighter. This can affect the weight of air and ultimately impact air pressure and weather patterns.
The temperature change can have a significant impact on the weight of air in the atmosphere. As the temperature rises, the air expands and becomes less dense, causing a decrease in weight and air pressure. This can affect weather patterns and atmospheric conditions.