or log in
The animation shows the way forces act on wheeled vehicles and vehicles with runners.
In this lesson you will learn more about how sound propagates.
Is a matchbox able to imitate the croak of frogs? With the following experiment we reveal the...
A hot air balloon is a balloon aircraft which is lifted by hot air.
A spacecraft on its path is in a constant state of free fall.
How can this pendulum accurately measure time in seconds?
Let's use musical instruments and our vocal cords as sources of sound.
Can a candle be re-lit if the flame of the match does not even touch it?