Physics
When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance ?

One-fourth
Four times
Two times
Half

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

ANSWER DOWNLOAD EXAMIANS APP