Where does this come from, and can I check it?

The oven flips polar molecules back and forth, and friction does the rest. The figure is taken from American Chemical Society, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a food fact?

Yes. It sits on the Food shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

Microwaves heat food by agitating water

The oven flips polar molecules back and forth, and friction does the rest Microwaves are electromagnetic waves that make polar molecules, above all water, rotate as the field alternates. That molecular churning generates heat throughout the food rather than from the outside in, though penetration fades in thick or dense pieces. The turntable exists because standing waves inside the cavity would otherwise leave cold patches. It sits in Mondo's food collection, one of 200 facts that each trace back to the reference below.

Where this comes from

American Chemical Society

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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The microwave oven was discovered accidentally by radar engineer Percy SpencerA melting candy bar near an active radar magnetron tube led to the commercial microwave oven in 1945 Water needs a lot of heat to warm upWater has one of the highest specific heat capacities of any common substance Sweating cools you through latent heatEach gram of evaporating sweat carries away a large amount of body heat Geysers need a narrow underground plumbingTrapped water superheats until pressure suddenly releases it as a jet of steam Wok hei needs a scorching hot panThe aroma comes from fat and food hitting metal far above boiling Horseradish loses its bite in hot liquidHeat deactivates the enzyme that creates its volatile heat

Tags: microwave, water, heat

Microwaves heat food by agitating water: the short answers

Where does this come from, and can I check it?: The oven flips polar molecules back and forth, and friction does the rest. The figure is taken from American Chemical Society, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a food fact?: Yes. It sits on the Food shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.