5.6 Questions

Collins, p.107

Note: 

ρ_{fresh water} = 1,000kg/m³; g = 10N/kg

5. Pressure difference = h x density x g

250,000-100,000= h x 1 x 10

h = 15,000 m

The pressure would increase if he were diving in sea water that is denser than fresh water.

6. Pressure difference = h x density x g

= 50 x 0.42 x 1.4

= 29.4 Pa