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A spectacular optical illusion using a chain of closed rings.
Can we break a stick with the weight of only a few sheets of paper?
This lesson presents the concept of speed.
This animation explains the most important characteristics of waves through sound waves.
We can further develop the machine we presented in the previous video, so it can dispense...
This lesson is about the sound waves surrounding us.
How can this pendulum accurately measure time in seconds?
A hot air balloon is a balloon aircraft which is lifted by hot air.