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SURA PUBLICATION-ACOUSTICS-ADDITIONAL QUESTIONS & ANSWERS (FILL IN THE BLANKS (COVERS THE WHOLE UNITS))
- The angle formed between the reflected ray and the normal is ------.
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- A compression travelling towards the rigid wall is reflected back as a
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- Rarefaction travels from to .
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- waves are sound waves with frequency below 20 Hz.
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- Waves produced during an earthquake and ocean waves are called waves.
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- waves with frequency greater than 20 kHz.
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- Human ear cannot detect waves.
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- Bats can detect waves.
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- Sound waves requires a for propagation.
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- Light waves are .
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- The wavelength of sound waves ranges from .
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- The wavelength of light waves ranges from .
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- Two types of velocity are velocity and velocity.
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- SI unit of velocity is .
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- The velocity with which the particles of a medium vibrate in order to ...
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- The velocity with which the wave travels through a medium is called .
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- The distance travelled by a sound wave in is called the velocity of t...
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- The speed of sound is directly proportional to the square root of the ...
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- Velocity of sound in solids decreases as the increases.
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- When sound is reflected from a convex surface, the· reflected waves ar...
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