A remotely operated probe is lowered vertically through a pool of brine in a salt mine. The brine has a constant density of 1200 kg/m3. The total pressure recorded by the probe increases from 126 kPa to 150 kPa.
Take g=10 N/kgg=10\ \mathrm{N/kg}g=10 N/kg. Use p=hρgp=h\rho gp=hρg. What vertical distance does the probe travel?
2.0 m2.0\ \mathrm{m}2.0 m
0.0020 m0.0020\ \mathrm{m}0.0020 m
12.5 m12.5\ \mathrm{m}12.5 m
10.5 m10.5\ \mathrm{m}10.5 m
132 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids, covering 15.2.1 Atmospheric pressure and height, 15.2.2 Pressure in fluids, 15.2.3 Pressure, force and area, 15.2.4 Pressure and depth, 15.2.5 Pressure in liquids: depth and density, 15.2.6 Upthrust, and 15.2.7 Floating and sinking. Each one has a worked solution and a mark scheme showing where the marks go.