A transverse wave, frequency 15.0 Hz, travels along a string. Distance between a crest and an adjacent trough is 3.50m. What is its wavelength?

3.50m

Explanation:

the wavelength of a wave is the distance between the crest and the adjacent trough

the highest part of a wave is called the crest and the lowest part is called a trough

when the distance between the crest and the trough is vertical it is called the wave height and when its between two adjacent crests or troughs its called a wave length as well

therefore, the wavelength of the transverse wave is 3.5m