Physics Paper 1 Mistakes

Question 1

What does the gradient of a speed-time graph represent

Answer 1

Acceleration

Question 2

What does the area under a speed-time graph represent

Answer 2

DIstance

Question 3

Explain how the emission of light from the fluorescent screen shows that the electrons incident on it are behaving as particles

Answer 3

Electrons must provide enough kinetic energy instantly to cause the excitation.
The atom/energy transfer in a 1 to 1 interaction.
Light emission due to excitation and de-excitation of electron.
Photon emitted when atoms de-excite or electrons move to lower energy levels