(a)[2]
State one similarity and one difference between an up quark and an up antiquark.
(b(i))[1]
On Fig. 7.1, draw an arrow to show the direction of the electric force on the stationary electron.
(b(ii))[2]
The electric field makes the electron move away from its starting position. Describe and explain the acceleration of the electron due to the field, as the electron moves through the field.
(b(iii))[2]
A stationary $\alpha$-particle is now placed in the same electric field at the same initial position that the electron occupied. Compare the initial electric force on the $\alpha$-particle with the initial electric force on the electron.