Physics

Physics

Problem

Two identical metal rods P and Q have coefficients of linear expansion of 1.8×10−5 K−11.8\times10^{-5}\,\text{K}^{-1} and 1.2×10−5 K−11.2\times10^{-5}\,\text{K}^{-1} respectively. Which statement about their coefficients of cubical expansion (γ) is correct? a) γP=γQ\gamma_P = \gamma_Q b) γP=2.25 γQ\gamma_P = 2.25\,\gamma_Q c) γP\gamma_P is greater than γQ\gamma_Q d) γP\gamma_P is smaller than γQ\gamma_Q

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