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Write answers the following questions.(a) Why do we hear musical notes when the strings of a sitar are plucked?(b) How does a bat find its way in the dark?(c) What is the sonar system based on?(d) Why is the sound of a bell smothered when a hand is placed on it? |
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Answer» Write answers the following questions. (a) Why do we hear musical notes when the strings of a sitar are plucked? (b) How does a bat find its way in the dark? (c) What is the sonar system based on? (d) Why is the sound of a bell smothered when a hand is placed on it? |
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