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Richard Feynman talks about the O ring Richard Feynman talks about the O ring
Posted by: Amalek61

Video duration: 30 seconds

Feynman states that the O ring material has no resilience at 32F or 0C which was the temperature at launch. This allowed the O2 leak from the main booster tank.

Related: challlenger, disaster, feynman, richard, ring

Demo of Liquid Oxygen\ Demo of Liquid Oxygen's paramagnetism
Posted by: Amalek61

Video duration: 22 seconds

Liquid oxygen is held in a magnetic field but liquid nitrogen is not since the former is paramagnetic (Oxygen molecules are polar)

Related: liquid, nitrogen, oxygen, paramagnetic, paramagnetism

Demo of igniting a Hydrogen filled balloon Demo of igniting a Hydrogen filled balloon
Posted by: Amalek61

Video duration: 33 seconds

Simple demo of igniting pure H2, a small amount of water vapor will have been produced.

Related: hydrogen, oxygen, reaction