A research group studies a high-altitude mountain lake. The lake has a surface area of 3500 m23500\text{ m}^23500 m2. The atmosphere exerts a downward force of 315,000,000 N315,000,000\text{ N}315,000,000 N on the surface of the lake.
Calculate the atmospheric pressure at the surface of the lake. Use the equation: \
\text{pressure} = \frac{\text{force}}{\text{area}}{\char"24}$The average atmospheric pressure at sea level is 101,300 Pa101,300\text{ Pa}101,300 Pa. Calculate the difference between the atmospheric pressure at sea level and the atmospheric pressure at the surface of this mountain lake.
18 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.