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PUMPA - SMART LEARNING

எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Subjects
Science State Board
Class 10
Acoustics
Textbook questions

2. Choose the best answer II

Exercise condition:

3 m.

1. If a sound wave travels with a frequency of $1.25 ×$

$10^{4}$ $Hz$ at $344$ , the wavelength will be __________.

$2.752$ $m$
$27.52$ $m$
$275.2$ $m$
$0.02752$ $m$

2. The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?

speed
frequency
wavelength
none of these

3. Velocity of sound in the atmosphere of a planet is $500$ $m/s$ . The minimum distance between the sources of sound and the obstacle to hear the echo, in point is __________.

$50$ $m$
$17$ $m$
$25$ $m$
$20$ $m$

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