The physics behind diving — pressure, buoyancy, the gas laws, and how light and sound behave underwater — practiced with unlimited fresh questions for every certification level.
Dive physics shows up on every diving exam, from Open Water to Instructor. Practice the relationships directly — pressure and depth, Boyle's Law and volume, buoyancy and density — until the numbers are intuitive.
A taste of the style. In the app you get a fresh set every time.
At 20 metres/66 feet in seawater, the ambient pressure is approximately:
Why: 1 bar/ata from the atmosphere plus about 2 bar/ata from 20 metres of seawater gives roughly 3 bar/ata.
An object that is neutrally buoyant in fresh water will, in salt water:
Why: Salt water is denser and exerts more upward force, so an object neutral in fresh water tends to float in salt water.
Pressure and depth relationships, Boyle's Law (pressure and volume), buoyancy and density, Dalton's Law of partial pressures, and how light, sound, and heat behave underwater.
Yes — basic physics (pressure, buoyancy, air volume) is part of the Open Water exam, and it goes deeper for the Divemaster and Instructor exams. The same practice topic scales with your level.
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