pressure cooker work on which principle?

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Here are some friends with simlar question as we.And I have this question for many days,anyone help us?
Kitty said: Yes.pressure cooker work on which principle?-I try seach this on internet but no results found.Maybe this is a stupid question.
Mike said: oh,no,you are wrong.I have found as below for this question(pressure cooker work on which principle?),it will help you,my kids.

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Answers:
Th Ideal Gas Law states:

P=pRT

P=pressure
p=density
R=dry gas constant
T=temperature

This equation shows us that pressure and temperature have a one-to-one relationship, so if pressure goes up temperature goes up.

For a pressure cooker, increasing the pressure causes water to boil at a higher temperature than normal. This means food cooks faster and gets hotter.

Other Answers:
ummm ... pressure maybe?

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Pressure.

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Pressure cookers work with steam and pressure

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bigger is the pressure, bigger is the temperature. So food cooks faster. this is physics!

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