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It is a well-known phenomenon that the sound of an approaching sound source is higher...
How does a piece of a cork behave on the surface of a glass of water? You can examine that in...
The length of the metal frameworks of bridges change when the temperature changes.
In this experiment we prove that it is possible to cut a bottle with just a string.
A hot air balloon is a balloon aircraft which is lifted by hot air.
Waves play an extremely important role in many areas of our lives.
Can we break a stick with the weight of only a few sheets of paper?
Submarines submerge and surface by changing the average density of the hull.