1. The problem statement, all variables and given/known data A 1.50 m string of weight 1.24 N is tied to the ceiling at its upper end, and the lower end supports a weight W. When you pluck the string slightly, the waves traveling up the string obey the equation y(x,t) = (8.50 mm)cos(172m^-1x - 2730s^-1t) How much time does it take a pulse to travel the full length of the string? What is the weight W? How many wavelengths are on the string at any instant of time? 2. Relevant equations Acos2pi(x/wavelength - t/T) Mu = Mass/L f= 1/T v=wavelength * f 3. The attempt at a solution Ok, so I found the mass of the string by doing w=mg and it was .127 kg. Then I found the mu, and that was .085kg/m. The wavelength was given to us in the equation to be 172 m and the T (period) was also given in the equation to be 2730 s. So, I found the frequency which is 1/T and it was .000366. Then I found the v, speed through the equation and it was .063 m/s. So, now that I have this, I don't know how to respond to the question though, how would I find the time it takes to travel down the string? Could I just do length divided by the velocity and I don't know how to find weight of the object? If anyone can help, please help.. Thanks in advance.