The Physics of Sound w/ Bill Nye the Science Guy
Twenty Thousand Hertz
00:00
What Is a Wave?
As sound moves through air, molecules are moving at the speed of sound. They bump into each other and produce these changes in momentum. This is manifested also as a change in pressure, which your ear consent to. We measure sound waves by their frequency - how many times they repeat every second. The scale we use to measure frequency is called hertz, named after the german scientist, heinrich hertz.
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