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प्रश्न
What does SONAR stand for?
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उत्तर
SONAR stands for "sound navigation and ranging".
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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 |
 |
 |
| III | IV |
Which diagram shows
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- a soft (or feeble) note,
- a bass (low frequency) note.
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100 Hz
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