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Rock-paper-scissors

In rock-paper-scissors, the least popular choice of players is paper. But is it really the weakest of the three?

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The magic chain

A spectacular optical illusion using a chain of closed rings.

Pitch and frequency, Part II

Experience the relationship between pitch and frequency through...

Exceeding the speed of sound

What is the speed of sound? What happens when an object exceeds...

Let's measure time!

This lesson presents timekeeping devices and the types and units...

Cartesian diver

Objects denser than water sink in water.

Звиждаљка од сламке

Обратите пажњу шта се дешава ако производите звук помоћу сламке...

Steam turbine

A drink can, water and a Bunsen burner can be used to create a...

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