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2007-10-12 06:13:00 · 8 answers · asked by Charlotte 2 in Science & Mathematics Physics

8 answers

Heat in a solid *is* the random vibration of particles.

2007-10-12 06:16:40 · answer #1 · answered by Dr. R 7 · 1 0

Actually you are bassackwards...heat, an energy, creates the vibration; not the other way around as you suggest. And the degree of vibration is what we measure as temperature.

There are all kind of ways to convert one form of energy into heat. For example, rapid oxidation, commonly called burning, converts chemical energy into heat energy in something called an exothermic chemical reaction. For example 2H2 + O2 --> 2H2O + heat.

Friction is another way. A mass m rubbing across a surface with a coefficient of friction k will generate an opposing force F = kmg. And as the mass moves a distance S, that entails work WE = kmgS, and the work converts some of the kinetic energy of motion into the heat energy of friction.

As one last example, nuclear fission also creates heat. Turns out that when children particles are created by splitting an parent atom, the total mass of the children is less than that of the original parent. And that mass difference shows up as energy, much of which is heat energy. That results from E = (M - m)c^2; where M > m and M is the parent atom mass and m is the sum of all the children masses.

Heat energy is just one of many forms of energy. And energy is just the capability to do work or cause a change. Heat can do that. It does work, for example, in an internal combustion engine like most cars have. And that heat comes from the oxidation of gasoline (petrol). Interestingly, it takes a bit of heat from the sparkplug to cause that change we call oxidation.

Bottom line...heat causes molecular vibration and the intensity of that vibration is measured by temperature.

2007-10-12 06:48:11 · answer #2 · answered by oldprof 7 · 0 0

Friction

2007-10-12 06:16:20 · answer #3 · answered by Anonymous · 0 0

When the partlices bump into whatever is containing them, they release energy through friction, which heats up the object.

2007-10-12 06:18:04 · answer #4 · answered by Derek T 2 · 0 0

The kinetic energy of random motion of particles in solids, liquids or gases is named as heat energy or thermal energy

Temperature of a body is a kinetic energy (random motion ) state.

When on touching a body appears hot then it means particles of that body have a higher K E 9random motion ) state compared to hand and K E of random motion is being transferred from body to hand

Higher is the rate of transfer, greater is the sensation of burning.in hand.

To 'heat' means to transfer K E of random motion from hot stove to the body whose temperature is to be raised or whose state is to be changed from solid to liquid or from liquid to vapor or gas

2007-10-12 06:30:23 · answer #5 · answered by ukmudgal 6 · 0 0

Brownian flow is led to via the flow of the debris. while debris are heated they flow greater. while cooled they flow much less. The flow does no longer produce warmth, that's produced via warmth. because it cools the action is far less. because it cools the warmth is misplaced to the ambience.

2016-12-14 15:39:05 · answer #6 · answered by ? 4 · 0 0

friction

2007-10-12 06:16:44 · answer #7 · answered by JIMMY L B 1 · 0 0

friction...?

2007-10-12 06:16:50 · answer #8 · answered by arun 2 · 0 0

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