A diver works in a freshwater lake on a day when the atmospheric pressure is 96 kPa and the density of the lake water is 1000 kg/m3.
The diver uses compressed air to breathe under water.
1500 litres1500\text{ litres}1500 litres of air from the atmosphere is compressed into a 10-litre10\text{-litre}10-litre gas cylinder.
The compressed air quickly cools to its original temperature.
Calculate the pressure of the air in the cylinder.
State the equation linking pressure difference, depth, density and ggg.
Calculate the increase in pressure when the diver descends from the surface to a depth of 18 m.
Calculate the total pressure on the diver at a depth of 18 m.
Assume that the atmospheric pressure remains at 96 kPa.
As the diver breathes out, bubbles of gas are released and rise to the surface.
The bubbles increase in volume as they rise.
Explain this increase in volume.
