4B40.32 - Low Temperature Phenomenon
To demonstrate how materials change when placed in a low temperature environment, specifically lead.
Get a dewer of liquid nitrogen, safety gloves and glasses, and the lead material. Provide tongs in case the item is dropped into the liquid nitrogen.
Put on the gloves and safety glasses. Wrap the lead wire around the provided cylinder to produce a spring-like shape. Show that the spiral can stretch and deform. Then dip the coil into the liquid nitrogen and wait til the nitrogen stops boiling. When you pull it out, show that the lead now has the ability to spring back. When using the lead bell, show that when you ring the bell before, it makes a thud. Dip into liquid nitrogen until stops boiling. Pull it out and show that it actually has a ringing tone once cooled.