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Microwave ovens

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silver | 10:58 Wed 24th Jan 2001 | How it Works
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How do microwave ovens work?

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the waves from the machine agitate the molecules in the food,they rub against each other and the friction causes heat..ergo cooks
Microwaves cause water molecules to vibrate. Heat is basically the amount that a molecule/atom is vibrating. (That's why a hot gas expands, or why an aerosol can gets cold when you use it for too long, it needs heat for the molecules to expand into a gas) So, the microwaves causing the molecules to vibrate IS the heat. No friction is involved.
Sensei is absolutely right - sorry michael!
I was watching "Myth Busters" on TV last night, and hey made the same error!!

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