One end of a horizontal string of linear density 5.6×10-4 is attached to a small-amplitude mechanical 280- oscillator. The string passes over a pulley, a distance away, and weights are hung from this end, the figure .
1. What mass must be hung from this end of the string to produce one loop of a standing wave? Assume the string at the oscillator is a node, which is nearly true.
2. What mass must be hung from this end of the string to produce two loops of a standing wave?