Question

What happens to a bar of metal when it's heated?

A.It gets longer.
B.The effect depends on the density of the bar.
C.It stays the same length.
D.It gets shorter

Answer 1

the answer is A, it will get longer

Answer 2

Hey There!!

Your answer will be A. It get longer.

Because, The kinetic energy of its atoms increase. They vibrate faster. This means that each atom will take up more space due to its movement so the material will expand. Some metals expand more than others due to differences in the forces between the atoms / molecules. . . .

Hope This Helps <3!!