| 1 | dp | = 0, | 1 | dp | = 0, | 1 | dp | = 1, | |||
| ρ | dx | ρ | dy | ρ | dz |
(1)
P = ∫ dp/ρ = z + a constant.
(2)
When the density ρ is uniform, this becomes, as before in (2) § 9
p = ρz + p0.
(3)
Suppose the density ρ varies as some nth power of the depth below O, then
dp/dz = ρ = μzn
(4)