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If my cylinder of air lasts 60 minutes while i am at the surface breathing normally, assuming all else is the same, how long will it last at 20 metres/66 feet breathing normally?

Respuesta :

Louli
As you descend, the pressure of the air increases and the volume of the air decreases as it becomes squeezed by the pressure.

The ratio is 1/pressure.

At 20 meters below the surface, the pressure of the air is 3 atm.
Time that oxygen tank can last = 1/3 x 60 = 20 minutes 

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