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    dragonarcher156's Avatar
    dragonarcher156 Posts: 1, Reputation: 1
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    #1

    Mar 21, 2009, 11:06 PM
    Science gravity
    Why flames of a fire rise even though gravity pulls things downwards?
    Anka Software's Avatar
    Anka Software Posts: 14, Reputation: 2
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    #2

    Mar 22, 2009, 12:29 AM

    Flames are hot and hence lighter than surrounding air and hence they rise.
    Perito's Avatar
    Perito Posts: 3,139, Reputation: 150
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    #3

    Mar 22, 2009, 04:41 AM

    Anka Software is correct. The difference in density between the gases in and around the flame and the air cause an upward force. There are many other upward forces -- someone jumps, airplanes fly because of an upward force on their wings. People shooting bullets in the air.

    Gravity is a force. These other things are forces in an opposite direction.
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