Break the Bolt, 4A30.30b

Topic and Concept:

Location:

Abstract:

A heated bar is tightened in a yoke against a cast iron peg which breaks as the bar cools.

Important Setup Notes:

This demonstration requires a supply of methane gas usually provided by the red and white gas carts found in rooms 2103, 2241, (and 2223 upon request).
This demonstration requires a supply of liquid nitrogen. The main supply is located at the loading dock. If 12 hours notice given to lecture demo, supply will be provided.

Setup and Procedure:

Cautions, Warnings, or Safety Concerns:

Always use the gloves and safety glasses throughout this demonstration.
Beware of the heated plate - contact with skin could cause severe burns!
Use care when working with the liquid nitrogen - prolonged contact with skin causes severe frostbite!

Discussion:

Discuss the physics behind the demonstration, explaining some of the various steps of the demonstration when appropriate.