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Find out how to move the straws without touching them, using the phenomenon of resonance.
Direct action pumps and suction pumps are among the simplest water pumps.
Learn how to pierce a balloon without popping it.
Can a candle be re-lit if the flame of the match does not even touch it?
This lesson helps to understand the Doppler effect.
This lesson introduces some basic ideas about sound.
The animation shows the way forces act on wheeled vehicles and vehicles with runners.
This lesson presents the concepts of density and buoyancy through the operation of the...