McqMate
| Q. |
When a ring of metal is heated what happens to its hole? |
| A. | expands |
| B. | contracts |
| C. | it expands or contracts according to its diameter |
| D. | it expands or contracts according to its coefficient of expansion |
| Answer» A. expands | |
|
Explanation: 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. Thermal expansion is the tendency of matter to change in volume in response to a change in temperature. |
|
View all MCQs in
PhysicsNo comments yet