Physics
Which is best used as a sound absorbing material in partition walls ?

Steel
Glass - wool
Glass pieces
Stone chips

ANSWER DOWNLOAD EXAMIANS APP

Physics
Energy in reflected light :

Increases with the increase in angle
Does not depends on the angle of incidence
Becomes maximum for angle of incidence equal to 45°
Decreases with the increase in angle of incidence

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

ANSWER DOWNLOAD EXAMIANS APP