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Helium balloon in water and air

 
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Apr28-08, 07:14 AM   #1
 

Helium balloon in water and air

If I were to let go of a Helium balloon with a volume of 3 liter at a depth of 10 meters, how do i calculate te time it will take the balloon to reach an altitude of a 100 meters in the air? And what changes if its not helium but hydrogen for instance?

hope anyone can help me with this
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Apr28-08, 10:09 AM   #2
 
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Welcome to PF greset,

This smells like homework to me...

What have you attempted thus far?
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