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A hot air balloon is a balloon aircraft which is lifted by hot air.
It is a well-known phenomenon that the sound of an approaching sound source is higher...
Find out whether the marble reaches the finish line faster on the straight or on the curved slope.
A spectacular optical illusion using a chain of closed rings.
Waves play an extremely important role in many areas of our lives.
In this experiment, we use buoyancy to study the balance of two glasses of water.
Can we break a stick with the weight of only a few sheets of paper?
Learn how to pierce a balloon without popping it.