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This lesson presents the concepts of density and buoyancy through the operation of the...
Can we break a stick with the weight of only a few sheets of paper?
Can a candle be re-lit if the flame of the match does not even touch it?
This lesson presents the concept of speed.
The three important laws describing planetary motion were formulated by Johannes Kepler.
The animation shows the way forces act on wheeled vehicles and vehicles with runners.
Learn how to pierce a balloon without popping it.
Waves play an extremely important role in many areas of our lives.