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Question
In crushing can experiment the can gets crushed because of:
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Solution
The correct option is A decrease in internal pressure
Crushing can experiment: Take an empty and absolutely clean can and put in it about 0.25 l of water. Heat the can in the fire till all the air is expelled out and the steam comes out freely from its mouth. Screw the mouth of the can with a lid and immediately remove it away from the fire. Pour cold water on the can. It is found that the can gets crushed.
The reason is that, on pouring cold water, the steam changes into water thereby, creating a partial vacuum inside the can, and hence the pressure exerted on the inner walls of the can decreases. Thus, the air pressure, exerted from outside is greater and that crushes the can.
Crushing can experiment: Take an empty and absolutely clean can and put in it about 0.25 l of water. Heat the can in the fire till all the air is expelled out and the steam comes out freely from its mouth. Screw the mouth of the can with a lid and immediately remove it away from the fire. Pour cold water on the can. It is found that the can gets crushed.
The reason is that, on pouring cold water, the steam changes into water thereby, creating a partial vacuum inside the can, and hence the pressure exerted on the inner walls of the can decreases. Thus, the air pressure, exerted from outside is greater and that crushes the can.
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