A small amount of water is boiled in a metal can with thin walls of iron. When steam comes out freely, the mouth of the can is screwed with a cap and cold water is poured over it. It is observed that the can gets crushed. The experiment proves that air exerts pressure:

sideways

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downward

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upward

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none of the above

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Solution

The correct option is D
none of the above

Correct option is D: none of the above
Explanation:
It is because on pouring cold water, the steam within the can suddenly liquefy.
Thus, a kind of partial vacuum is formed within the can.
The air from outside which is at a much higher pressure, exerts a force from all directions and hence crushes it.
Hence, option (D) is correct.

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