cos θ sin ϕ − ρ sin θ sin ϕ ρ cos θ cos ϕ sin θ sin ϕ ρ cos θ sin ϕ ρ sin θ cos ϕ cos ϕ 0 − ρ sin ϕ | = − ρ 2 sin ϕ {\displaystyle
" Esto ye: P = P 0 ρ 0 ⋅ ρ {\displaystyle P={\frac {P_{0}}{\rho _{0}}}\cdot \rho } yá que P ⋅ V = P 0 ⋅ V 0 = P ⋅ m ρ = P 0 ⋅ m ρ 0 {\displaystyle P\cdot