Chapter 10
Sound Waves: Characteristics and Applications
CBSE Class 9
Science Solutions
Educart Science class Class 9 NCERT Exemplar cover
Question:

Draw a graph to represent a sound wave for which the density amplitude is 3 units and wavelength is 4 cm.

Answer: Verified

To draw a graph of a sound wave with the given parameters, the distance is plotted on the x-axis (in cm) and the density is plotted on the y-axis (in units). The amplitude is the maximum height of the crest (or depth of the trough) from the average density line, which is 3 units here. The wavelength is the distance between two consecutive crests or troughs, which is 4 cm.

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