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Give reasons. (a) What is an excellent coolant. (b) Mercury is used in a thermometer. (c) A bimetallic strip is used in electrical gadgets. (d) An iron tyre is heated before fitting it on a wheel. |
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Answer» Give reasons. (a) What is an excellent coolant. (b) Mercury is used in a thermometer. (c) A bimetallic strip is used in electrical gadgets. (d) An iron tyre is heated before fitting it on a wheel. |
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