help a girl out please :( Ok I don't know exactally what I am doing wrong here, someone please help! The speed of a transverse wave on a string is 400 m/s, and the wavelength is 0.19 m. The amplitude of the wave is 1 mm. How much time is required for a particle of the string to move through a total distance of 1.0 km? I tried to solve for this by: v=lamda/T so.. 400=.19/t which equals a time of .000475 seconds per cycle and i thought if I want 1000m (1km) i need to go 1000m/.19m to get how many cycles are necessary, that equals 5263.15 cycles to go 1000 meters so... 5263.15 cycles (.000475m/cycle)=2.5 seconds to complete all the cycles that equals 1000 meters or 1 km. Except when I input this into my computer, its saying its wrong. can anyone pelase tell me what I am missing???