A square is cut out of a copper sheet. Two straight scratches on the surface of the square intersect forming an angle theta. The

Question

4 years ago

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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

Physics

1 answer:

GarryVolchara [31] · Answer 1 · 2021-11-23T04:41:06+03:00

Answer:

<em>a) increases</em>

Explanation:

Almost all substance or material undergoes expansion due to heating. Heat gives thermal energy to the molecules of a substance increasing their body temperature. The temperature of a substance is the measure of the average kinetic energy of the molecules of that substance. When the temperature of a substance increases, the molecules begin to agitate and try to move far from each other, leading to either a linear, area, or cubic expansion, or all three of them. Metals like copper expand very well on heating, and their expansion is relatively minute, but very observable. When the face of such a copper is scratched to give and angle, heating the copper uniformly will cause the copper to expand, leading to an increase in the angle formed.