Conceptual Physics (12th Edition)

Published by Addison-Wesley
ISBN 10: 0321909100
ISBN 13: 978-0-32190-910-7

Chapter 14 - Think and Explain: 71

Answer

An object floats (i.e., rises in air) only if the buoyant force is greater than its weight. The buoyant force equals the weight of the displaced air. A steel tank filled with helium weighs more than the air it displaces, so it won’t rise. On the other hand, the helium in a light balloon weighs less than the air it displaces.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.