An aluminum rod 1.60 m long is held at its center. It is stroked with a rosin-coated cloth to set up a longitudinal vibration. The speed of sound in a thin rod of aluminum is 5 100 m/s.
(a) What is the fundamental frequency of the waves established in the rod?
(b) What harmonics are set up in the rod held in this manner?
(c) What If? What would be the fundamental frequency if the rod were made of copper, in which the speed of sound is 3 560 m/s?