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## Homework Statement

A diver dives to a depth of 40 m in fresh water where he releases a toy balloon of volume 10 cm^3. What will be the size of the balloon when it reaches the surface? (The pressure increass at a rate of 1 atmosphere for every 10 m descent in fresh water)

## Homework Equations

P1V1=P2V2

## The Attempt at a Solution

P1= 4 atm

V1= 10 cm^3

P2= ?

V1=?

I just dont know how to find the pressure when it reaches the surface... what would the pressure be?

Thankyou:)

Kind regards