A sealed hollow ball floats in liquid P. The ball is transferred to liquid Q, which has a greater density than liquid P. What happens to the ball when it is at rest in liquid Q?
A smaller fraction is submerged, because the denser liquid produces the balancing upthrust with less of the ball submerged
A smaller fraction is submerged, because the weight of the ball decreases when it enters the denser liquid
A larger fraction is submerged, because the denser liquid exerts a greater downward pressure on the ball
The same fraction is submerged, because the weight of the ball has not changed between the liquids
108 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.