A solid rectangular brass structural slab is used during underwater testing inside high-pressure chambers.
Explain why the forces on the slab at the bottom of the chamber cause the slab to remain stationary.
When the slab is at the bottom of a shallow chamber, the top surface of the slab is 4.50 m below the surface of the liquid. The force acting on the top surface of the slab due to the weight of the liquid is 7938 N. The gravitational field strength is g=9.8 N/kgg = 9.8\text{ N/kg}g=9.8 N/kg. Calculate the density of the liquid in this chamber.
The slab is then lowered into an ultra-deep test chamber filled with a different dense liquid. When the slab is at a depth of 3.00 m in this deep chamber, the force due to the pressure of the liquid on its top surface is 4140 N.
Determine the force due to the weight of the liquid on the top surface of the slab when it is at the bottom of this deep chamber at a depth of 28.5 m (as shown in Panel B). Give your answer to 3 significant figures.
Pressure and pressure differences in fluids (physics only) Questions
Practise AQA GCSE Physics Pressure and pressure differences in fluids (physics only) with exam-style questions for Foundation and Higher tier. 27 questions covering Pressure in a fluid and Atmospheric pressure, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.