Physics

Problem

A square brass plate of side

0.25\,\text{m}

contains a centrally cut square hole of side

0.05\,\text{m}

. The coefficient of superficial expansion of brass is

3.8 \times 10^{-5}\,^{\circ}\text{C}^{-1}

. Calculate the rise in temperature required so that the area of the hole increases by

1\%