Two solid blocks have the same volume as each other. Block A has a density of 700 kg/m3 and block B has a density of 1400 kg/m3. Both are placed in water of density 1000 kg/m3. What happens?
Both float, because the two blocks have equal volumes
Both sink, because the weight of each block acts downwards
A sinks and B floats, because A is less dense than water
A floats and B sinks, because A is less dense than water
41 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.