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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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To solve the problem step by step, we will break it down into two parts: finding the number of holes on the disc and calculating the wavelength. ### Step 1: Calculate the number of rotations per second We know that the disc siren rotates 270 times in 1.5 minutes. First, we need to convert 1.5 minutes into seconds. 1.5 minutes = 1.5 × 60 seconds = 90 seconds Now, we can find the number of rotations per second: ...
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