Why does the density of solid substances chan | vedclass

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(B) The density $\rho$ of a substance is defined as the ratio of its mass $m$ to its volume $V$,given by the formula $\rho = \frac{m}{V}$.When the tem

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Mass remains constant,volume increases due to thermal expansion.

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(B) The density $\rho$ of a substance is defined as the ratio of its mass $m$ to its volume $V$,given by the formula $\rho = \frac{m}{V}$.When the temperature of a solid substance increases,its atoms vibrate with greater amplitude,causing the average distance between them to increase. This phenomenon is known as thermal expansion.As a result of thermal expansion,the volume $V$ of the solid increases.Since the mass $m$ of the substance remains constant during this process,the increase in volume $V$ leads to a decrease in density $\rho$ because $\rho$ is inversely proportional to $V$.

Why does the density of solid substances change with an increase in temperature?

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