Units to measure sound — task. Science CBSE Homework Assignments, Class 9.

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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5. Units to measure sound

Task: