Explain, in terms of the behaviour of molecules, how a gas exerts a pressure on the walls of its container. (4)
This question is 4 marks so you need to make at least 4 points.
These types of questions just require memorising the 4 points:
Lots of molecules collide with the walls.
The molecules change momentum as they collide with the walls.
Force is the rate of change of momentum.
Pressure = force/area.
Remember these 4 points and you'll get full marks for the question.
JF
Related Physics A Level answers
All answers ▸How would you calculate the moment of a Force on a rigid object?
When a 470 micro farad capacitor is discharged through a fixed resistor R, the pd across it decreases by 80% in 45 s. Calculate the time constant of the circuit
State assumptions made about the motion of the molecules in a gas in the derivation of the kinetic theory of gases equation.
3 resistors, R1, R2 and R3 are attached in parallel across a 6V cell with resistances 3, 4 and 5 Ohms respectively. Calculate the current across each resistor.