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Explain the f...

Question

Explain the following:

A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle.

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Solution

Hot water is poured on the neck of the bottle while removing a glass stopper stuck in the neck of a bottle. On pouring hot water on the neck of the bottle, the neck expands and glass stopper in it gets space to loosen and makes it easy to remove the stopper.

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Explain the following:

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(c) The gaps are left between the successive rails on a railway track.

(d) A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle.

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2.iron rims are heated before they are fixed on wooden wheels

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5. A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle

The internal diameter of the neck of the water bottle can be measured by

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Change of State

Standard VIII Physics

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