Boiling at room temperature

Water boils at 100 degrees Celsius. But is it possible to boil water at room temperature?

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The brachistochrone problem

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Suction pumps and direct action pumps

Direct action pumps and suction pumps are among the simplest water pumps.

The faithful cork

How does a piece of a cork behave on the surface of a glass of water? You can examine...

Torsion balances

A force can be measured by measuring the twisting of the torsion wire in a torsion...

Archimedes' seesaw

In this experiment, we use buoyancy to study the balance of two glasses of water.

Weightlessness

A spacecraft on its path is in a constant state of free fall.

Balloon on a skewer

Learn how to pierce a balloon without popping it.

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