Ever want to hear or see beat frequencies? Here you go! 

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Hearing Beats 

 Seeing Beats

Read more: Hearing and Visualizing Beat Frequencies

The connection between simple harmonic and circular motion.

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Read more: Simple Harmonic Oscillator

The sound of a moving object will change pitch if it is moving!

Read more: What is Doppler Shift?

The resonant frequencies of metal strips depend on their lengths.

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