SSC CHSL 2013 · Question 81 of 207
thermometers because the gases have large coefficient of expansion. Coefficient of Thermal expansion is the tendency of matter to change in volume in response to a change in temperature, through heat transfer. When a substance is heated, its particles begin moving more and thus usually maintain a greater average separation.
Source: SSC CHSL Solved Paper 20-10-2013 (Disha Publications) · reliable-secondary
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