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

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37. Multiple choice question XXXVII

1. On increasing the temperature, the speed of sound in air:

Increases
Decreases
Does not change
First increases then becomes constant

2. Loudness measures the sound energy reaching the ear per second and depends on the amplitude of the sound wave. What is the unit used to measure the loudness of sound?

\(hertz\)
\(decibel\)
\(meter/second\)
\(second\)

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