Everyday objects at low temperature
[M | t+ | ★★★]
Change of properties of objects after immersion in liquid nitrogen.
[M | t | ★★]
Dull at room temperature, rings clearly after immersion in liquid nitrogen.
[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.
[S | t+ | ★★★]
Suspension of magnet above superconducting disc.
[S | t+ |—]
Persistent eddy currents suspend magnet lowered over a superconducting disc.
[M | t | ★★★]
Shoot the ring through the roof after dipping it in liquid N2; Lenz's law induced EMF in metal ring.
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.
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