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Can the force of gravity increase/lower temperature?
    #7758695 -

Considering that an atom/molecule is matter and gravity is a force that acts on the said matter, wouldn't that cause acceleration towards the source of gravity? If temperature is basically a measure of the movement of atoms/molecules, wouldn't gravity actually effect temperature then?

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Re: Can the force of gravity increase/lower temperature? [Re: darklucidity]
    #7758899 -

In a way, yes. Gasses in general get hotter when they are compressed. Usually this compression is visioned as taking place in a cylinder with a piston. But if gravity is strong enough, it can do the trick.

Think of the sun. Its immense gravity forces many atoms in a close configuration, thus increasing their temperature. This temperature is what keeps the sun from collapsing in further (by driving the fusion). If the gravity were magically stronger on the sun, its size would shrink and temperature would go up further.

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Re: Can the force of gravity increase/lower temperature? [Re: DieCommie]
    #7759411 -

I think that its the fusing of atoms, not the gravity, that causes heat in the sun.

what happens when you compress a gas to a certain point? it loses energy and becomes a liquid.

i would think that the fact that gravity agitates the atoms and introduces some dort of energy would affect the temperature, if only slightly.


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Re: Can the force of gravity increase/lower temperature? [Re: nobhdy]
    #7759467 -

On a much more massive scale, gravity can affect temperature of planets via tides. If you have a moon (or several moons) orbiting a planet, it tugs the surface in one direction, and this creates friction on the planet, and thus heat. I guess you could say the temperature is really due to frictional force rather than gravity, but gravity plays an essential part.


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Word to your mom.

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Re: Can the force of gravity increase/lower temperature? [Re: BrainChemistry]
    #7759833 -

it's gravity that causes all the pressure in planets and stars that cause them to have molten insides, or fusing all over in the case of stars.


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Re: Can the force of gravity increase/lower temperature? [Re: darklucidity]
    #7759888 -

friction causes heat. gravity and pull things together, causing friction and thus, heat.


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No, no, you're not thinking, you're just being logical. ~ Niels Bohr

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Re: Can the force of gravity increase/lower temperature? [Re: automan]
    #7760496 -

yes, would raise temperature

> what happens when you compress a gas to a certain point? it loses energy and becomes a liquid.

the energy of a system and the temp are two differnt things. the temp would increase, as a liquid is usually a lower energy state than a gas

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Re: Can the force of gravity increase/lower temperature? [Re: johnm214]
    #7762153 -

For example, in astrophysics, gravity directly influences pressure and density of a planet or star, and thus has a direct influence on temperature.

To be more precise, the so called "hydrostatic condition" which you often encounter in astrophysics, atmospherics or plain fluid dynamics tells you how gravity is directly related to the way pressure varies from point to point in your system and with some computations you could know how it influences temperature.

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