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people have been hurt by hot liquid in cups or bowls 'exploding' when they take it out of the oven. find out what causes this effect, and how you can stop it happening?

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theanswerbankrrr | 22:17 Wed 24th Oct 2012 | Science
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people have been hurt by hot liquid in cups or bowls 'exploding' when they take it out of the oven. find out what causes this effect, and how you can stop it happening?
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I will.
This sounds like a homework question, and you ought to be researching it for yourself.
Don't put them in the b.....y oven! Not rocket science.
is that out of the microwave oven? it's because they put it on a cold surface, i was told that in ist year cookery, except then they didn't have microwaves but it's the same principle, same as putting a cold metal teaspoon in a china cup of hot tea
I was bottom of the class in physics at school but even I know the answer to this. It is as Dotty says, a very hot substance coming into contact with a cold one. As Daisy says, either don't put it in the oven in the first place or allow it to cool to room temperature before removing.
or use a wooden pot stand
Superheating can occur when an undisturbed container of water is heated in a microwave oven. When the container is removed, the water still appears to be below the boiling point. However, once the water is disturbed, some of it violently flashes to steam, spraying boiling water out of the container. The boiling can be triggered by jostling the cup, inserting a stirring device, or adding a substance like instant coffee or sugar. The chances of superheating are greater with smooth containers, because scratches or chips can house small pockets of air, which serve as nucleation points. Chances of superheating can increase with repeated heating and cooling cycles of an undisturbed container, like when a forgotten coffee cup is re-heated without being removed from a microwave oven. This is due to heating cycles progressively de-gassing the liquid. There are ways to prevent superheating in a microwave oven, such as putting a popsicle stick in the glass or using a scratched container.

http://en.wikipedia.o...urrence_via_microwave
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people have been hurt by hot liquid in cups or bowls 'exploding' when they take it out of the oven. find out what causes this effect, and how you can stop it happening?

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