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A disc siren with certain number of hole...

A disc siren with certain number of holes rotates uniformly 270 times in one and half minute. The frequency of the note emitted is 48 Hz. If the velocity of sound in air is `336 m s^(-1)`, find its wavelength and number of holes on the disc.

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`(i) lamda = (v)/(n)`
No. of holes = `("frequency ")/("No of ratation in one sec")` (ii) 16
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PEARSON IIT JEE FOUNDATION-WAVE MOTION AND SOUND-CONCEPT APPLICATION (LEVEL-2)
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