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The length of the metal frameworks of bridges change when the temperature changes.
A hot air balloon is a balloon aircraft in which is lifted by hot air.
A force can be measured by measuring the twisting of the torsion wire in a torsion balance.
In certain cases, liquids do not mix together, and form layers instead. See what happens when we...
In rock-paper-scissors, the least popular choice of players is paper. But is it really the...
Learn how to pierce a balloon without popping it.
Direct action pumps and suction pumps are among the simplest water pumps.
Is a matchbox able to imitate the croak of frogs? With the following experiment we reveal the...