Question

Source of sound produces 20 crests and 20 troughs in 4 seconds. The second crest is 3cm away from the first crest. Then calculate wavelength, frequency and wave speed

Answer 1

Answer:

There are 20 crests and 20 trough in 0.2s, which implies 20 waves.

And if there are 20 crests and 20 trough, this mean that there are 20 waves in 0.2s

∴ Frequency= Number of waves/ Time taken

=

0.2

20

=

2

200

=100H

z

∴ν=100H

z

Explanation:

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Mark brainliest