Question regarding Bouyancy in Water

  • Thread starter Ralith
  • Start date
  • #1
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This has been bugging me for a bit. Take two, identical, rigid containers. Fill one with helium at the level in say... a balloon? Then take the other one, and suck all the air out. Take them to the bottom of a container of water- Which will go up quicker?
 

Answers and Replies

  • #2
mgb_phys
Science Advisor
Homework Helper
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Assuming the vacuum one doesn't crush - it will weigh slightly less than the helium one and so rise faster.
If you could make the envolope strong enough, 'nothing' is the best thing to fill an airship with.
 
  • #3
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Thanks. Thought so, but wasn't sure.
 

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