Okay, I have this study guide for a test, but I'm having troubles figuring out the answers...so these are some things I'm wondering: 1. If you have a taut string, by what factor would you have to increase the tension to double the wave speed? I think it's 4, but I'm not sure. 2. If a string is under constant tension and generates a harmonic wave, by what factor would the amplitude and speed change if the power is doubled? I have no clue on this one. 3. And how would you go about solving this problem: A sinusoidal wave is traveling along a rope. The oscillator that generates the wave completes 40 vibrations in 30s. A given peak travels 5m along the rope in 2s. What is the wavelength? I know wavelength equals speed divided by frequency...but I don't know what to use as speed or frequency, so therein lies my problem. Any help and/or explanations would be greatly appreciated.