The frequency of radio waves emitted by ...

The frequency of radio waves emitted by a satellite decreases as the satellite passes away from the _________ .

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SURA PUBLICATION-ACOUSTICS-ADDITIONAL QUESTIONS & ANSWERS (FILL IN THE BLANKS (COVERS THE WHOLE UNITS))

Echo is used to determine the of sound waves in any medium.
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are basically curved surfaces which are used in auditoria and halls to...
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is a hearing aid used by people, who have difficulty in hearing.
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A is a horn-shaped device used to address a small gathering of people...
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The frequency of radio waves emitted by a satellite decreases as the s...
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From the frequency change, the speed and location of the aeroplanes an...
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The speed of marine animals and submarines can be determined by using ...
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is a branch of physics that deals with production, transmission, recep...
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The vibrating bodies produce energy in the form of waves are .
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Sound is produced by .
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Sound can propagate through medium.
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Sound that cannot be heard by the human ear is .
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The distance travelled by one wave is taken as .
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The velocity of sound is in gaseous medium.
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As the density increases, the velocity of sound .
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Velocity of sound in solids decreases as the increases.
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When humidity increases, the speed of sound .
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The velocity of sound changes by when the temperature changes by 1^@C...
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The bouncing of sound waves from the interface between two media is te...
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The waves that strike the interface are termed as .
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