The distance between the first and the third nodes of a standing wave is 0.4 m, its maximum displacement is 0.01 m and its frequency is 20 Hz. The wave- functions of the two travelling waves which interfere to give the standing wave are then: O y1 = 0.01 sin(5x-40tt); y2 = 0.01 sin(5rx+40nt), O y1 0.005 sin(5rx-40nt); y2 0.005 sin(Srx+40nt), O y1 = 0.04 sin(20x-320nt); y2 0.04 sin(20x+320nt), O y1 = 0.02 sin(20x-320nt), y2 0.02 sin(20x+320nt), O y1 =0.01 sin(10x-80nt), y2 0.01 sin(10mx+80nt),

The distance between the first and the third nodes of a standing wave is 0.4 m, its maximum displacement is 0.01 m and its frequency is 20 Hz. The wave- functions of the two travelling waves which interfere to give the standing wave are then: O y1 = 0.01 sin(5x-40tt); y2 = 0.01 sin(5rx+40nt), O y1 0.005 sin(5rx-40nt); y2 0.005 sin(Srx+40nt), O y1 = 0.04 sin(20x-320nt); y2 0.04 sin(20x+320nt), O y1 = 0.02 sin(20x-320nt), y2 0.02 sin(20x+320nt), O y1 =0.01 sin(10x-80nt), y2 0.01 sin(10mx+80nt),