A long metal ruler is heated, and its length expands by 0.001%. At the same time, a small hole in the ruler will increase in area by about

Question

Quizplus · Accepted Answer

When a metal ruler expands due to heating, both its length and width increase. The area of a hole within it would increase approximately by twice the linear expansion percentage because area expansion is roughly proportional to the linear expansion in both dimensions (length and width). Therefore, if the length expands by 0.001%, the area would expand by approximately 0.002%.

A Long Metal Ruler Is Heated, and Its Length Expands