PhysicsLAB CP Workbook
Gases

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A principle difference between a liquid and a gas is that when a liquid is under pressure, its volume
 
and its density
 
When a gas is under pressure, its volume
 
and its density
 
Refer to the following information for the next question.

The following cartoon is more humorous to physics types than to non-physics types.
 
What physics has occurred?
 

Refer to the following information for the next question.

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.
 
 
 
That is, what would be different about its size and why? 

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.



 
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