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प्रश्न
Fill in the blank with suitable word .
Sound waves are caused by ...................
उत्तर
Sound waves are caused by Vibrations.
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संबंधित प्रश्न
How is ultrasound used for cleaning?
Explain the working and application of a sonar.
How is an ultrasound scan for fetus (unborn baby) better than X-ray ?
What happens to the pitch of a sound if its frequency increases ?
Fill in the blank with suitable word :
Pitch of sound depends on ....................
Explain the term 'pitch' of a sound. On what factor does the 'pitch' of a sound depend ?
How is it that bats are able to fly at night without colliding with other objects ?
Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.
What is the range of frequencies associated with (a) infrasound (b) audible sound, and (c) ultrasound ?
Which of the two produces ultrasonic waves : porpoise or whale ?
