Difference between revisions of "Ball and feather in air/vacuum"

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==Description==
 
==Description==
A feather falls more slowly than a ball down a tube due to air resistance. When the tube is evacuated, both the feather and ball fall with equal speed.
+
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==
bla bla bla
+
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

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