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The following cartoon is more humorous to physics types than to non-physics types.
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The sketch below shows the launching of a weather balloon at sea level. Discuss with your partner and then describe what the same weather balloon would look like when it is high in the atmosphere.
In general, a hydrogen-filled balloon that weighs 10 N must displace ____ N of air in order to float in air.
- If it displaces less than ____ N it will be buoyed up with less than ____ N and sink.
- If it displaces more than ____ N it will be buoyed up with more than ____ N and move upward.