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Waves are created when a source of energy (force) causes a vibration. A vibration is a repeated back-and-forth or up-and-down motion. Waves carry energy through empty space or through a medium...

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Go to my site for more about lessons! ►►http://www.b7musicstudio.com/#!lessons/c16aj What is pitch, what is frequency, and what do they have to do with each other? I doubt you've ever seen a video explaining these two concepts as fun as this!

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Medium of Propagation of Sound | Physics | Don't Memorise

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Physics - Waves -  Introduction - Definitions, Logintudinal and Transverse.