Physics
When a ring of metal is heated what happens to its hole ?

It expands or contracts according to its coefficient of expansion
It expands or contracts according to its diameter
Expands
Contracts

ANSWER DOWNLOAD EXAMIANS APP

Physics
Ice is packed in saw dust because

Saw dust does not stick to the ice.
Saw dust is poor conductor of heat.
Saw dust will not get melted easily.
Saw dust is a good conductor of heat.

ANSWER DOWNLOAD EXAMIANS APP