Physics

Physics

Problem

The density of aluminium is 2.70 g cm−32.70\,\text{g}\,\text{cm}^{-3} at 20 ∘C20\,^{\circ}\text{C}. Its coefficient of volume expansion is 7.5×10−5 K−17.5\times10^{-5}\,\text{K}^{-1}. Calculate its density at 120 ∘C120\,^{\circ}\text{C} (take mass as constant). a) 2.72 g cm−32.72\,\text{g}\,\text{cm}^{-3} b) 2.68 g cm−32.68\,\text{g}\,\text{cm}^{-3} c) 2.64 g cm−32.64\,\text{g}\,\text{cm}^{-3} d) 2.66 g cm−32.66\,\text{g}\,\text{cm}^{-3}

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