A periodic transverse wave that has a frequency of 10 Hz travels along a string. The distance between a crest and either adjacent trough is 2.5 m. What is the wavelength?

5m

Explanation:

The wavelength of a wave is the distance between successive trough or crest ;

Meaning that distance between successive trough is distance between trough and crest plus distance between crest and trough

Which is 2 times distance between trough and crest;

2×2.5= 5m

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