Shirley Yackin is holding the phone cord in her hand. It is stretched to a length of 2.4m and has a mass of 1.8 kg. If the tension in the phone cord is 2.5N, then determine the speed of vibrations within the cord. With waht frequency must Shirley vibrate the cord up and sown in order to produce the second harmonic within the cord? If Shirley maintains this same frequency and wishes to produce the fourth harmonic, then she will have to alter the speed of the wave by chaning the tension. Assuming the same mass density, and the same frequency, to what tension must the cord be pulled to produce the fourth harmonic?
A stretched string fixed at each end has a mass of 36.0 g and a length of 7.40 m. The tension in the string is 51.0 N.
