Explain why your ears ‘pop’ during takeoff in an aeroplane. A7. Outside air pressure decreases rapidly at high altitude; pressure inside the ear is initially higher, so air pushes out until equalised.
Calculate the pressure at the bottom of a 5 m deep swimming pool. (Density of water = 1000 kg/m³, ( g = 10 ) N/kg) A4. ( P = h \rho g = 5 \times 1000 \times 10 = 50,000 ) Pa (or 50 kPa) aqa science p2 5.5 activity sheet answers
Why does a dam have a thicker base than top? A3. Pressure increases with depth, so the base must be thicker to withstand the greater force. Explain why your ears ‘pop’ during takeoff in