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Frequency

is a whistle ...

Question

________ is a whistle that can produce frequencies greater than 20000 Hz.

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Solution

Galton whistle can produce ultrasound i.e. sounds with frequencies greater than 20000 Hz.
It is used for training animals that can hear ultrasound like dogs and cats.
Hence, Galton whistle is a whistle that can produce frequencies greater than 20000 Hz.

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Q. A narrow sound pulse (for example, a short pip by a whistle) is sent across a
medium. (a) Does the pulse have a definite (i) frequency, (ii)wavelength, (iii) speed of propagation ? (b) If the pulse rate is 1 after every 20 s, (that is the whistle is blown for a split of second after every 20 s), is the frequency of the note produced by the whistle equal to 1/20 or 0.05 Hz?

Q. A narrow sound pulse (for example, a short pip by a whistle) is sent across a medium. (a) Does the pulse have a definite (i) frequency, (ii) wavelength, (iii) speed of propagation? (b) If the pulse rate is 1 after every 20 s, (that is the whistle is blown for a split of second after every 20 s), is the frequency of the note produced by the whistle equal to 1/20 or 0.05 Hz ?

Galton's whistle is a whistle that can produce frequencies greater than

Sound wave having a frequency greater than 20000 Hz is said to be

Sound wave having a frequency greater than 20000 Hz is said to be

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