Physics
Hot water is poured simultaneously in four metallic tumblers painted outside with different paints. After some time the water will be found to have cooled most in the tumbler painted.

Rough white
Rough black
Shining black
Shining white

ANSWER DOWNLOAD EXAMIANS APP

Physics
Dynamo is a device for converting

Mechanical energy into electrical energy
Magnetic energy into electrical energy
Chemical energy into electrical energy
Heat energy into electrical energy

ANSWER DOWNLOAD EXAMIANS APP