Last Minute G484 Flashcards
1
Q
2 conclusions from Brownian motion?
A
Air particles are much smaller than smoke particles
Air particles move with random/haphazard motion
2
Q
Use kinetic model of a gas and newtons laws of motion to explain how a gas exerts a pressure on the walls of its container?
A
Momentum of the molecule changes when it collides with the wall
Force on the molecule = rate of change of its momentum (by N2L)
Force on the wall is equal and opposite to the force on the molecule (by N3L)
Pressure = (sum of forces of all molecules)/area of wall
3
Q
State with a reason what happens to the frequency of oscillations in SHM when the amplitude is changed?
A
No change in frequency because in simple harmonic motion frequency is independent of amplitude.
