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Sound and hearing (longitudinal waves (a plucked guitar string will…
Sound and hearing
longitudinal waves
a plucked guitar string will vibrate at its natural frequency and alternately compresses and rarefies the air alongside it
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resonance
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resonance occurs if frequency of the the driving force equals the natural frequency of the system, e.g. child on a swing
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speed of sound
young's modulus use temp in kelvin not celsius take average mass of all these gasses, did he get an average mass based on the average percentage of each gas molecule in air
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the frequency stays constant when it enters a new medium the wavelength changes
the intensity of the wave doesnt stay the same part of the wave gets reflected only part will be absorbed into the new medium
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Hearing
sound waves enter the ear. Forces exert on eardrum due to air pressure variations cause it to vibrate
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diffraction
the spreading out of a wave when it encounters a barrier, the barrier has to be smaller or the same size as the wavelength of the wave
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