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What should we look out for in wine cellars? In this experiment we produce carbon dioxide with...
A hot air balloon is a balloon aircraft in which is lifted by hot air.
Direct action pumps and suction pumps are among the simplest water pumps.
The three important laws describing planetary motion were formulated by Johannes Kepler.
In this experiment we prove that it is possible to cut a bottle with just a string.
The length of the metal frameworks of bridges change when the temperature changes.
In this experiment, we use buoyancy to study the balance of two glasses of water.
Submarines submerge and surface by changing the average density of the hull.