Calculating the diameter of a bubble when it reaches the surface

AI Thread Summary
To calculate the diameter of an air bubble released by a scuba diver at a depth of 15 m, one must consider the pressure changes as the bubble rises to the surface. The pressure at depth can be determined using the formula p = F/A, and it is important to recognize that this is an isothermal process. The pressure decreases as the bubble ascends, leading to an increase in volume and diameter. After applying the relevant equations and understanding the pressure-depth relationship, the correct diameter of the bubble at the surface can be determined. The discussion concludes with the participant confirming they found the right answer.
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Homework Statement



A scuba diver releases an air bubble of diameter 1.0 cm at a depth of 15 m below the surface of a lake. What will be the diameter of this bubble when it reaches the surface? Assume that the temperature of this bubble remains constant.



Homework Equations



p=F/A
pV=nRT
pV=NkT
R=8.31 J/mole K




The Attempt at a Solution



I'm not sure on how to find the unknowns (F or p) for the formula p=F/A
 
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You realize this is an isothermal process?
You just need to know the pressure as a function of depth - google for it :) if it's not in your notes.
 
Simon Bridge said:
You realize this is an isothermal process?
You just need to know the pressure as a function of depth - google for it :) if it's not in your notes.

Ok I got the right answer now. Thank you.
 

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