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Physics
Classical Physics
Thermodynamics
How does evaporation generate cooling? Swamp coolers edition
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[QUOTE="DrJohn, post: 6854574, member: 698451"] Asteroids are the remains from the formation of the universe, they are not "lifted up" from somewhere. Gravity pulls them around space, so they have some potential energy, and because they are moving some (lots ;) ) of kinteic energy. Now whether its potential energy increases as it is pulled towards the earth or sun is a trickier one to answer - I am not an astronomer. But it's kinetic energy is increased as it accelerates due to gravitational forces. So when an object falls from a height towards the earth, it is converting its potential energy into kinetic energy. Potential energy is decreasing and kinetic energy is increasing. Same is true if it gets pulled towards the sun. More kinetic and less potential energy. [/QUOTE]
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Physics
Classical Physics
Thermodynamics
How does evaporation generate cooling? Swamp coolers edition
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