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Explain the following : 1.telephone wires sag in summer 2.iron rims are heated before they are fixed on wooden wheels 3. The are left between the successive rails on a railway track 4. A cement floor is laid in small pieces with gaps in between 5. 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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Answer» Explain the following : 1.telephone wires sag in summer 2.iron rims are heated before they are fixed on wooden wheels 3. The are left between the successive rails on a railway track 4. A cement floor is laid in small pieces with gaps in between 5. 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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