A technician works in an industrial brine reservoir on a day when the atmospheric pressure is 101 kPa and the density of the brine is 1200 kg/m3.
The technician uses compressed air from a scuba system to breathe.
1600 litres1600\text{ litres}1600 litres of air from the atmosphere is compressed into an 8-litre8\text{-litre}8-litre gas cylinder.
The compressed air quickly cools back to its original temperature.
Calculate the pressure of the air inside the cylinder.
State the equation linking pressure difference, depth, density and ggg.
Calculate the increase in pressure when the technician descends from the surface of the reservoir to a depth of 25 m.
Calculate the total pressure on the technician at a depth of 25 m.
Assume that the atmospheric pressure remains at 101 kPa.
As the technician breathes, bubbles of exhaled gas are released and rise to the surface.
The bubbles increase in volume as they rise.
Explain this increase in volume.