Everyday objects at low temperature
[M | t+ | ★★★]
Change of properties of objects after immersion in liquid nitrogen.
[In-Depth Description]
Lead Bell
[M | t | ★★]
Dull at room temperature, rings clearly after immersion in liquid nitrogen.
[In-Depth Description]
Condensing Oxygen
[M | t+ | —]
Atmospheric oxygen condenses on the outside of a teakettle filled with liquid nitrogen.
Magnetic Properties of Liquid O2
[M | t+ |—]
Liquid oxygen is observed to be magnetic as it is attracted to the pole pieces of a magnet.
Change of Volume with State
[M | t+ | ★★]
CO2 and He balloons in liquid nitrogen.
[In-Depth Description]
Meissner Effect
[S | t+ | ★★★]
Suspension of magnet above superconducting disc.
[In-Depth Description]
Persistent Currents
[S | t+ |—]
Persistent eddy currents suspend magnet lowered over a superconducting disc.
Jumping Ring
[M | t | ★★★]
Shoot the ring through the roof after dipping it in liquid N2; Lenz's law induced EMF in metal ring.
[In-Depth Description]
Carbon Resistor and Bulb
[M | t | —]
Carbon has negative temperature coefficient; bulb goes dull when resistor is dipped in liquid N2.
Copper and Bulb
[M | t | ★★]
Copper has positive temperature coefficient; light bulb gets brighter when copper leads are dipped in liquid N2.
[In-Depth Description]
Contact Us
Mailing Address: Lecture Demonstration Services, Science Center, Rm B-08A, 1 Oxford Street, Cambridge, MA 02138
Campus Location: Science Center B-08A | Tel: (617) 495-5824 | Email: scidemos-at-fas.harvard.edu