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Give scientific reasons.(a) An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not.(b) The telephone wires which sag in summer become straight in winter.(c) Dew drops form on the grass in winter.(d) In winter, why does an iron pillar feel colder than a wooden pole ? |
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Answer» Give scientific reasons. (a) An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not. (b) The telephone wires which sag in summer become straight in winter. (c) Dew drops form on the grass in winter. (d) In winter, why does an iron pillar feel colder than a wooden pole ? |
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