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प्रश्न
Name two sources of sound.
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उत्तर
Each vibrating body is a source of sound. We, the human beings, produce sound when our vocal cords vibrate on blowing air through them by our lungs. Some animals like birds, frogs etc., also produce sound due to vibration of their vocal cords. But bees do not have the voice-boxes. They produce sound by moving their wings up and down very fast.
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संबंधित प्रश्न
Describe an experiment to estimate the speed of sound in air.
What minimum distance is required between the source of sound and the reflecting surface to hear an echo ? Give reason.
What is the SI unit of frequency?
State whether the following statement is true or false :
Sound produced by a vibrating body travels to our ears by the actual movement of air.
Name four ways in which sound can be produced.
Describe a simple experiment to show that the prongs of a sound producing tuning fork are vibrating.
How is sound produced? Explain with the help of an example.
The total number of compressions and rarefactions produced per second in a sound wave is 1000. The frequency of the sound wave is __________.
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