When we heat a substance the energy of the molecules increases, they move away a bit more hence they occupy more space. In liquids molecules move more freely than in solids, when they are heated their movements increases more than in solids. A liquid expands more than solid. Similarly, gases expand more than liquids.
Heat can change the state from Solid to ______________________ . | |||
Right Option : B | |||
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In the transmission of electricity ______________________ between poles sag during summer and become tight in winter because of expansion due to heat. | |||
Right Option : C | |||
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Which of the following are correct ? (a) Heat can burn things which is a physical change . (b) The temperature rises with heat and as an object is heated it gains energy. (c) Excessive heat kills the organisms. | |||
Right Option : B | |||
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