Difference between revisions of "Ball and feather in air/vacuum"
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| Line 3: | Line 3: | ||
==Description== | ==Description== | ||
| − | A feather falls more slowly than a ball down a tube due to air resistance. When the | + | A feather falls more slowly than a ball down a tube due to air resistance. When the tubes are evacuated, both the feather and ball fall with equal speed. |
==Equipment== | ==Equipment== | ||
| − | * | + | *Double tube assembly |
| − | * | + | *Vacuum pump |
| + | *Clear flexible tubing | ||
| + | **Power cable | ||
| + | **Extension cord | ||
==Instructions== | ==Instructions== | ||
| − | + | With both cylinders in air, rotate the tubes by 180 degrees... | |
==Keywords== | ==Keywords== | ||
Revision as of 17:54, 23 June 2014
PIRA index: 1C20.10
Description
A feather falls more slowly than a ball down a tube due to air resistance. When the tubes are evacuated, both the feather and ball fall with equal speed.
Equipment
- Double tube assembly
- Vacuum pump
- Clear flexible tubing
- Power cable
- Extension cord
Instructions
With both cylinders in air, rotate the tubes by 180 degrees...
Keywords
ball, drop, feather, vacuum
Images & Movies
caption
caption
caption
