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Galton's whis...

Question

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

A

2,000 Hz

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B

20,000 Hz

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C

200 Hz

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Solution

The correct option is B
20,000 Hz

Galton's whistle can produce frequencies greater than 20,000 Hz.
This whistle is used to train dogs because they can hear ultrasound greater than 20,000 Hz.
Hence, option (b) 20,000 Hz is correct.

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