The displacement of a standing wave on a string is given by D = 9.9 sin(0.55x)cos(56t), where x and D are in centimeters and t is in seconds.
(a) What is the distance (cm) between nodes?
cm
(b) Give the amplitude, frequency, and speed of each of the component waves.
cm
Hz
cm/s
(c) Find the speed of a particle of the string at x = 3.50 cm when t = 2.5 s.
cm/s