or log in
The animation shows the way forces act on wheeled vehicles and vehicles with runners.
The length of the metal frameworks of bridges change when the temperature changes.
In this lesson you will learn more about how sound propagates.
What is the speed of sound? What happens when an object exceeds the speed of sound?
Experience the relationship between pitch and frequency through measurements.
In certain cases, liquids do not mix together, and form layers instead. See what happens when we...
Find out how to move the straws without touching them, using the phenomenon of resonance.
In rock-paper-scissors, the least popular choice of players is paper. But is it really the...