Physics
The function of ball bearings in a wheel is :

To increase friction
Just for convenience
To convert static friction into kinetic friction
To convert kinetic friction into rolling friction

ANSWER DOWNLOAD EXAMIANS APP

Physics
For an ideal gas, which one of the following statements does not hold true?

The potential energy of the gas molecules is zero
The kinetic energies of all gas molecules are not same
There is no interactive force between the molecules.
The speed of all gas molecules is same

ANSWER DOWNLOAD EXAMIANS APP