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प्रश्न
Complete the following sentence:
Elephants produce ____________sound.
रिकाम्या जागा भरा
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उत्तर
Elephants produce infrasonic sound.
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संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
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| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Can you hear the sound produced due to vibrations of a seconds pendulum? Give reasons.
State the approximate speed of ultrasound in air.
State two applications of ultrasound.
Sonar makes use of :
What do you understand by the term infrasonic vibrations?
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
What are ultrasonic?
Does SONAR make use of infrasonic sound?
1 hertz is equal to
