Try: circle area, U = I × R, radius
Buoyancy, flow continuity and Bernoulli equation.
Fₐ = ρgV
v₂ = A₁v₁ / A₂
p₂ = p₁ + ρ(v₁²−v₂²)/2 + ρg(h₁−h₂)
Q = Av
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