Physics
Which conservation principle is applicable in the case of the motion of a rocket?

Conservation of charge
Conservation of mass
Conservation of energy
Conservation of momentum

ANSWER DOWNLOAD EXAMIANS APP

Physics
Railway tracks are banked on curves

necessary centripetal force may be obtained from the horizontal component of the weight of the train
to avoid frictional force between the tracks and wheels
necessary centrifugal force may be obtained from the horizontal component weight of the train
the train may not fly off in the opposite direction

ANSWER DOWNLOAD EXAMIANS APP

Physics
Dynamo is a device for converting

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

ANSWER DOWNLOAD EXAMIANS APP