A 4.0 Hz wave with an amplitude of 12 cm and a wavelength of 30.0 cm travels along a stretched string.(adsbygoogle = window.adsbygoogle || []).push({});

(a) How far does the wave travel in a time interval of 3.0 s?

m

(b) How far does a knot on the string travel in the same time interval?

m

I got the answer to part (a) by using: x= lambda x (time/frequency)

The answer I got for it was 3.6 m.

I don't know what to do for part (b) Something to do with the amplitude, but I'm not sure...pls help! Thanks!

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# Homework Help: Wave amplitude problem

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