Physics
A stone is dropped from the roof of a house towards the ground. The kinetic energy of the stone will be maximum:

When it touches the ground
When it is just on the half-way
Just after it is dropped
Just before it touches the ground

ANSWER DOWNLOAD EXAMIANS APP

Physics
Why are we able to hear short wave broadcasts better than long wave broadcasts ?

Short waves are more energetic than long waves.
By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.
Short waves are unaffected by atmospheric disturbances.
Short wave broadcasts are made by nearby radio stations.

ANSWER DOWNLOAD EXAMIANS APP

Physics
Mirage is due to:

Unequal heating of different parts of the atmosphere
Magnetic disturbances in the atmosphere
Equal heating of different parts of the atmosphere
Depletion of ozone layer in the atmosphere

ANSWER DOWNLOAD EXAMIANS APP

Physics
The bats can fly in the dark because

They generate flashes of light
They have weak legs and are likely to be attacked by predators
They generate ultrasonic sound waves
They can see the objects in darkness

ANSWER DOWNLOAD EXAMIANS APP