Exp. 01
Pressure & volume
Boyle's Law
P₁V₁ = P₂V₂
Why lung gas volume shrinks on descent, re-expands on ascent, and what that means for equalization and squeeze.
Open moduleCurriculum · Gas physics & physiology
Physics of freediving
Each module connects a gas law to depth and breath-hold physiology. Run the sliders, read the formulas, build intuition.
P₁V₁ = P₂V₂ · P_total = Σ P_i · C = k · P_N₂ · Bohr shift
Exp. 02
Coming soonPartial pressures
Dalton's Law
P_total = P_N₂ + P_O₂ + …
How O₂ and N₂ partial pressures rise with depth, drive narcosis, and fall on ascent — including shallow-water blackout.
Coming soonExp. 03
Coming soonGas dissolution
Henry's Law
C = k · P_N₂
How partial pressure drives nitrogen into tissues over time — loading at depth, off-gassing on ascent, and when it matters on breath-hold.
Coming soonExp. 04
Coming soonCO₂, pH & O₂ unloading
The Bohr Effect
↑ CO₂ · ↓ pH → O₂ unloads
Higher CO₂ and lower pH weaken hemoglobin's grip on oxygen — so tissues can use it. Hyperventilation does the opposite and raises blackout risk.
Coming soonIntegrated lab
See Boyle, Dalton, and Henry together
The descent simulator ties Boyle, Dalton, and Henry together in one interactive view.