How can the number of molecular collisions per unit time in a gas be increased ?

What are the different ways of increasing the number of molecular collisions per unit time in a gas?

Mention the different ways of increasing the number of molecular collision? Per unit time in a gas.

What are the different ways of increasing the number of molecules collisions per unit time against the walls of the vessel containing a gas ?

What are the different ways of increasing the number of molecules collisions per unit time against the walls of the vessel containing a gas ?

What are the different methods of increasing the number of molecular collisions per second in a gas?

The number of molecules per unit volume (n) of a gas is given by

If the amount of a radioactive substance is increased four times then how many times will the number of atoms disintegrating per unit time be increased ?