Physics
A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will

Have its shape changed
Decrease
Increase
Remain unaffected

ANSWER DOWNLOAD EXAMIANS APP

Physics
A white and smooth surface is

Good absorber and good reflector of heat
Good absorber and bad reflector of heat
Bad absorber and good reflector of heat
Bad absorber and bad reflector of heat

ANSWER DOWNLOAD EXAMIANS APP