As the liquid turns to gaseous nitrogen at around -196 C, [The Action Lab] figured that it could be used to propel a simple steam engine at room temperature. Testing this out had amusing results.

When the coil is cooled in liquid nitrogen, the resistance drops and the flashlight bulb glows brighter. The resistivity of copper is temperature-dependent, with its resistance about 2 times greater ...

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Nitrogen makes up about 78% of the Earth's atmosphere. Liquid nitrogen is very cold, so it is often used to freeze food. The boiling point of nitrogen is −196 °C, so liquid nitrogen is very ...