I. Thermodynamics
I3. Gases
Demo No.
Title
I3-15
Magdeburg Hemispheres - Portable
Purpose
Equipment
To demonstrate forces arising from atmospheric air pressure.
Magdeburg hemispheres with hand pump and hose.
Suggestions
Setup Time
None.
None.
Description of Demo:
About 40 pumps will adequately evacuate the hemispheres, and the vacuum will last about one minute. The hemispheres have a diameter of about 5 inches, thus requiring a force of over 250 pounds to separate them when fully evacuated. A safety restraint prevents the two hemispheres from separating entirely.
References:
None.
Created & Modified by
Melissa Bishop/DoIT
April 21, 2000
