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  1. It is easy to burst a gas-filled balloon with a neelde than with a nail. It is because
    1. nail is more longer than needle.
    2. nail exerts more pressure than needle on the balloon.
    3. needle exerts more pressure than nail on the balloon.
    4. gas is reactive with the needle.
Correct Option: C

It is easy to burst a gas-filled balloon with a needle than with a nail because the needle applies more pressure than nail. Besides, the application of the pressure is on a small surface area than in the case of nail. In the case of needle, it is a very tiny area at the tip of the needle, so only a little force gives a lot of pressure (pressure = force/area).



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