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The length of the metal frameworks of bridges change when the temperature changes.
This lesson is about the sound waves surrounding us.
In this experiment, we use buoyancy to study the balance of two glasses of water.
Direct action pumps and suction pumps are among the simplest water pumps.
The animation shows the way forces act on wheeled vehicles and vehicles with runners.
What is the speed of sound? What happens when an object exceeds the speed of sound?
When does echo form? Why does sound spread easier at night? What is the secret to a good...
Let's make musical instruments.