Q321
When a ring of metal is heated what happens to its hole ?
A.
Expands
AnswerB.
Contracts
C.
It expands or contracts according to its diameter
D.
It expands or contracts according to its coefficient of expansion
Answer: Option A
Solution
Answer: Option A
Solution:
The hole size will increase because in expansion the size between two molecules do not increase so when the molecules on the outer edge move outward. Due to expansion, the size of the hole will also increase so as to compensate the distance change between the molecules.