Question

A square is cut out of a copper sheet. Two straight scratches on the surface of the square intersect forming an angle theta. The square is heated uniformly. As a result, the angle between the scratches?a) increasesb) decreasesc) stays the samed) depends on whether theta is obtuse or acute

Answer 1

The angle between the scratches on the surface of the square will decrease as the square is heated uniformly.

Step-by-step explanation:

The angle between the scratches on the surface of the square will decrease as the square is heated uniformly.

When the square is heated, it will expand and become larger in size. As a result, the scratches on the surface of the square will move further apart, causing the angle between them to decrease.

This change in angle between the scratches is independent of whether theta is obtuse or acute.