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

    Mar 27, 2008, 06:53 PM
    Science: matter- gas
    If hot air comes from a mouth or blow dryer, Is it still a gas? They are both gases because the hot air from your mouth is expelled oxygen and the hot air from the blow dryer is forced generated heat from electricity? Am I right?
    Credendovidis's Avatar
    Credendovidis Posts: 1,593, Reputation: 66
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    #2

    Mar 27, 2008, 07:01 PM
    Quote Originally Posted by sgdavis
    If hot air comes from a mouth or blow dryer, Is it still a gas? They are both gases because the hot air from your mouth is expelled oxygen and the hot air from the blow dryer is forced generated heat from electricity? Am I right?
    Of course hot air from a mouth or from a dryer is a gas.
    Gas can be anything, as long as it is not solid nor liquid (forget the plasma state)
    Air as in our atmosphere contains nitrogen, oxygen, CO2, helium, hydrogen and some stray gases.
    sovaira's Avatar
    sovaira Posts: 271, Reputation: 10
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    #3

    Mar 30, 2008, 03:03 AM
    Hot air from the mouth contains majorly CO2, some nitrogen and other gases not needed by the lungs, oxygen will be there but in low quatity, as the mximum amount gets absorbed in the lungs.it also has some water vapours or the moisture content.

    While the hot air coming out of the dryer is the air that is around us, but this air gets hot after passing through the heated filament that gets hot whne the dryer is turned on . This air contains CO2 about 0.04%, nitrogen 78%, and other trace gases constituenting the air mixture.
    karenn97's Avatar
    karenn97 Posts: 1, Reputation: 1
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    #4

    Feb 23, 2011, 06:09 PM
    Student's know that in solids the atoms are closely locked in position and can only vibrate,in liquids the atoms and molecules are loosely connected and can collide with and move past one another;and in gases the atoms and molecules are free to move independently,colliding frequently.

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