Discussion :: Physics
- The rice is cooked more quickly in a pressure cooker because
|
A.
It is covered. |
|
B.
Less quantity of water is used. |
|
C.
None of these |
|
D.
Water boils at a higher temperature under pressure. |
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Answer : Option D
Explanation :
Food is cooked more quickly in a pressure cooker because at the higher pressure (1 bar/15 psi), the boiling point of water rises from 100°C (212°F) to 121°C (250°F). The hotter steam is able to transmit its thermal energy to the food at around 4 times the rate of conventional boiling.
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