Physics

Physics

Problem

A square copper plate of side 20 cm20\,\text{cm} is at 20 ∘C20\,^{\circ}\text{C}. It is heated to 120 ∘C120\,^{\circ}\text{C}. Given βCu=34×10−6 K−1\beta_{\text{Cu}} = 34\times10^{-6}\,\text{K}^{-1}, the increase in its area is closest to a) 2.04 cm22.04\,\text{cm}^2 b) 0.68 cm20.68\,\text{cm}^2 c) 1.36 cm21.36\,\text{cm}^2 d) 2.72 cm22.72\,\text{cm}^2

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