Kepler´s laws of planetary motion

The three important laws describing planetary motion were formulated by Johannes Kepler.

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A drink can, water and a Bunsen burner can be used to create a special steam turbine.

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We can further develop the machine we presented in the previous video, so it can dispense...

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This lesson introduces some basic ideas about sound.

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This animation explains the most important characteristics of waves through sound waves.

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The length of the metal frameworks of bridges change when the temperature changes.

Submarine operation

Submarines submerge and surface by changing the average density of the hull.

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