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Skhandelwal
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Friction may be a factor but is it the only reason? Even w/ friction... why do things when accelerating heat up?
Thx.
Thx.
Skhandelwal said:Friction may be a factor but is it the only reason? Even w/ friction... why do things when accelerating heat up?
Thx.
G01 said:I assume you are asking why things (such as a race car) heat up when accelerating. This is because of air friction and friction in the engine, tires, etc. All the energy dissipated by the friction will be converted to heat. In fact, the friction will still heat the object even if it is not accelerating. The air friction is proportional to the objects velocity, not its acceleration. In other words, there is still friction, accelerating or not, and either way it causes heat. Was this what you were looking for?
Skhandelwal said:(what is bonds made up of?)
G01 said:You seem to be a little confused about bonds. A molecule is held together by the electrostatic force. It is kind of like how we are held to the Earth by gravity. There is no physical substance connecting us to the Earth. The same is true with the atoms in a molecule. They are held there by a force and it requires some energy to overcome this force. When two atoms combine to form a molecule, this energy that enabled them to be free can be released, usually as heat. Again though, this isn't really why objects heat up when moving in air. This only really applies to the engine in my car example above. An object that did not have an engine would still heat up when moving in air, it would just slow down because of this (it's kinetic energy would be converted to thermal energy by the friction.)
Skhandelwal said:Friction may be a factor but is it the only reason? Even w/ friction... why do things when accelerating heat up?
Thx.
...and resultant material friction generates heat.
Maxwell's Demon said:I thought that all matter radiates some quantity of energy when subjected to pressure, such as an accelerating force.
pervect said:What you probably mean is that if you compress a gas, it heats up. This does have a lot to do with pressure, but it doesn't have anything to do with "radiating energy", and only a little bit to do with acceleration.
pervect said:[add]In fairness, one could say that the issue has to do generally with transferring energy, but "radiating" is the wrong word here, technically radiation is one specific means of transfering energy, a means that is not related to this particular problem.
pervect said:The details of how the energy gets transferred is that the molecules hit a moving piston, and this causes them to speed up. So I suppose you could say that compressing the gas by moving the piston accelerates the molecules, but I didn't get that from your original question. "Radiating energy" really doesn't apply in any way that I can see.
pervect said:It is also not universal that energy must be stored as heat - in a gas there is no other way to store the energy, but this is not true for instance of a spring. If you have an ideal spring, and you compress it, it will not heat up. The energy is stored in a different form - basically, its stored in the bonds between the atoms, bonds which do not exist in a gas.
The spring may heat up slightly if it is not perfectly ideal, one could generalize this to "friction" perhaps, though I'm not sure exactly how this happens - it's related to the fact that the spring isn't quite perfectly elastic. But while an ideal gas does heat up when you compress it, an ideal elastic body (or an ideal spring) will not.
1. What is the relationship between acceleration and heat?
When an object accelerates, its molecules are moving at a faster rate. This increased movement causes the molecules to collide more frequently, generating heat. Therefore, anything that accelerates will heat up due to the increased molecular movement.
2. How does Newton's second law of motion explain the heating effect of acceleration?
According to Newton's second law, the force applied to an object is directly proportional to its acceleration. As an object accelerates, a greater force is applied, causing an increase in molecular movement and thus, an increase in heat.
3. Can you give an example of how acceleration can cause heating?
One example is when you rub your hands together quickly. This causes an increase in acceleration and friction, which generates heat due to the increased molecular movement.
4. Is there a limit to how much heat can be generated by acceleration?
Yes, there is a limit. If an object reaches a certain speed, its molecules will be moving too fast to generate any more heat. This is known as the maximum thermal velocity.
5. Can anything accelerate without generating heat?
No, any object that accelerates will generate some amount of heat. However, the amount of heat generated may be very small depending on the object's mass and acceleration rate.