1. The problem statement, all variables and given/known data One end of a horizontal string of linear density 4.7 multiplied by 10-4 kg/m is attached to a small-amplitude mechanical 58 Hz vibrator. The string passes over a pulley, a distance L = 1.50 m away, and weights are hung from this end, Fig. 11-48. Assume the string at the vibrator is a node, which is nearly true. What mass must be hung from this end of the string to produce a standing wave with the following number of loops? a). one loop: ? b). two loops: ? c). five loops: ? 2. Relevant equations I don't know how to do this problem that is why I'm asking. 3. The attempt at a solution I really don't know where to start that is why I need help please!