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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?
Name the unit used to measure the loudness of sound. Also write its symbol.
How does the pitch of a sound depend on frequency ?
What type of scans are used these days to monitor the growth of developing baby in the uterus of the mother ?
What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves ?
Fill in the blank with suitable word :
Pitch of sound depends on ....................
Name an animal which navigates and finds food by ecolocation.
What is sonar ? Explain its use.
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