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Observe what happens when making sounds with shorter and shorter pieces of the same straw.
This lesson presents timekeeping devices and the types and units of time measurement.
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?
A spacecraft on its path is in a constant state of free fall.
Experience the relationship between pitch and frequency through measurements.
This lesson presents the concepts of density and buoyancy through the operation of the...
This lesson presents the concept of speed.