Consider a wave on a string with constant tension. If the frequency of the wave is doubled, by what multiplicative factor does a) the speed and b) the wavelength change? I dont really know how to begin to answer this question. The best i could think of is using v=wavelenght x f and then putting a square route on the f (frequency) and solving for wavelenght and i guess v (speed of the wave) from there. If anyone know where i can find more problems like this (aside from my text book) let me know as i am really struggling with this and i want to get a better understanding of it.