Explain how musical instruments rely on the principles of harmonics to produce a wide variety of sounds

A violin string or the air column inside a flute vibrate not only at a fundamental frequency but also at certain whole-number multiples of that frequency called harmonics. Thus an instrument actually produces many different tones simultaneously, and the particular harmonic pattern gives each type of instrument a unique sound quality.

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Tobey

grav forces affect all objects magnetic forces affect magnetic objects and electric currents

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.