An exhibit in a science museum requires the observer to use a pump to create air bubbles in a column of liquid. The bubbles then rise through the liquid.
(i) Complete the free-body force diagram for a bubble as it rises through the liquid.
(3)
*(ii) It is observed that larger bubbles reach the top of the column of liquid in less time than smaller
bubbles.
By considering the forces acting on a bubble as it rises, explain this observation.
(3)