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Sound and pitch – Vibrations – Physics

By |2018-05-31T11:49:23-07:00August 17th, 2017|History|

Guitars can make sound of different pitches by using strings of different thicknesses When two things hit against each other, they set up a vibration that reaches your ear as a sound. Different things make different vibrations when they hit, and that's why you hear high notes and low notes. Things that vibrate quickly make small [...]

What makes sound? Simple physics

By |2018-05-31T11:49:26-07:00August 17th, 2017|Physics|

Playing a French horn makes sounds because you blow into it and that moves the air Like light, sound travels through the air in waves, but unlike light, sound is not made of lots of tiny particles. When something makes a sound, like you clapping your hands, it's because when you clapped your hands that shook the [...]

Shoebox guitar project – Sound – Physics

By |2018-05-31T11:49:16-07:00August 17th, 2017|Physics|

You can make a guitar out of a shoebox and rubber bands Begin by making some loud noises, like hitting a drum and clapping your hands. Can you feel the vibration? Can you see the vibration of the drum? What if you hit harder, smaller things? Tap a drinking glass with a metal [...]

Sine waves – trigonometry – math

By |2017-07-29T17:59:39-07:00July 29th, 2017|Math|

Sine wave In order to save energy, many, many things in nature move in a kind of repeated pattern we call a sine wave: water waves, sound waves, light waves, electricity, radio waves, and microwaves, for instance. The waves move in one direction quickly, then slow down until they stop, and begin moving [...]