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Bimetallic Strip in Liquid Nitrogen

Materials
3
Difficulty
1
Safety
3
A bimetallic strip is purchased or made with two different metals. Heating it or cooling in liquid nitrogen causes it to bend.
  • See Also
    Heating Bimetallic Strip
  • Notes
    Happens because the metals expand at different rates. The same concept is used in thermostats.
  • Web Links
    hyperphysics.phy-astr.gsu.edu/hbase/thermo/bimetal.html
    Author : Hyper Physics
    Description :
    www.physics.ncsu.edu/demoroom/html/demos/37.html
    Author : NCSU Physics
    Description :
  • Videos
    www.youtube.com/watch?v=sxEmmniysIk
    Author : William Kane
    Description :
    www.youtube.com/watch?v=WzX5tpC8Bs8
    Author : bbates1550
    Description :
  • Categories
    Heat | Liquid Nitrogen
Materials
1: Easy to get from supermarket or hardware store
2: Available in most school laboratories or specialist stores
3: Requires materials not commonly found in school laboratories

Difficulty
1: Can be easily done by teenagers
2: Can be done by science teachers
3: May require a more experienced teacher

Safety
1: Minimal safety procedures required
2: Some safety procedures required to perform safely
3: Only to be attempted with adequate safety procedures and trained staff

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