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प्रश्न
Fill in the blank with suitable word .
Sound waves are caused by ...................
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उत्तर
Sound waves are caused by Vibrations.
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संबंधित प्रश्न
Explain how bats use ultrasound to catch a prey.
How is ultrasound used for cleaning?
Explain the term 'amplitude' of a wave. Draw the diagram of a wave and mark its amplitude on it.
Name the unit used to measure the loudness of sound. Also write its symbol.
How is an ultrasound scan for fetus (unborn baby) better than X-ray ?
Draw labelled diagrams to represent (a) soft sound, and (b) loud sound, of the same frequency.
Explain how, bats use ultrasound to catch the prey.
Which of the two produces ultrasonic waves : porpoise or whale ?
What is sonar ? Explain its use.
What type of waves are generated by SONAR device fixed to a fishing ship ?
