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Introductory Physics Homework Help
Can blowing on liquids actually cool them down?
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[QUOTE="haruspex, post: 4980678, member: 334404"] Well, that gets into what does one mean by temperature. Generally it is considered to be the motion of the particles after subtracting out the bulk movement of the system. The flow of air created across the surface by blowing is a bulk movement. It may help, instead, to convey just how negligible the extra energy is. Air molecules around us move at 400-500 m/s. Call it 450 m/s. An extra 1m/s from blowing only raises this to ##\sqrt(450^2+1)##m/s (Pythagoras), so even if turned into chaotic motion it only raises the temperature by ##280/450^2## degrees C. [/QUOTE]
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Introductory Physics Homework Help
Can blowing on liquids actually cool them down?
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