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Loudness

Why does traf...

Question

Why does traffic policeman uses metallic whistle instead of using paper whistle or leaf whistle? (2 marks)

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Solution

Among the all three whistles, the metallic whistle creates the loudest whistling sound. (1 mark)

It's sound can be heard from a very long distance. Therefore, it is used by traffic police to clear traffic on roads. (1 mark)

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