Question

A square is cut out of a copper sheet. A circular hole is drilled in the square. The square is heateduniformly. As a result, the diameter of the hole

increases
decreases
stays the same
The answer depends on the size of the hole.

Answer 1

increases

Step-by-step explanation:

When an object is heated, it expands.

When the object expands linearly, it is called linear expansion.

When the area of the object increases, it is called areal expansion.

When a hole is heated, then the area of hole increases, and then the diameter of hole also increases.

Answer 2

diameter of the hole increases .

Step-by-step explanation:

In this case , the square sheet with hole will expand as if it had no hole .

A hollow sphere will expand to the same extent that a solid sphere expands .If we assume no hole in the square sheet of copper , the distance between two extreme point on the diameter will increase . It will increase even if circular hole is present . Hence diameter of the hole will increase.