Stationary Waves 1. A string is fixed at one end, the other end passes over a pulley and the string is held in tension by a weight. Vibration generator to signal generator Fig 1 Stationary waves are set up on the string (length 1.2 m) by a vibration generator. The three lowest frequencies at which stationary waves are produced are 25 Hz, 50 Hz and 75 Hz. a) Draw the appearance of the 50 Hz stationary wave. b) What is the wavelength of the wave on the string at 50 Hz? c) The stationary wave is produced by progressive waves travelling in opposite directions. Calculate the speed of the progressive wave along the string. d) If the tension of the string is 10.0 N, calculate the mass per unit length of the string, stating clearly the unit it is measured in.

Stationary Waves 1. A string is fixed at one end, the other end passes over a pulley and the string is held in tension by a weight. Vibration generator to signal generator Fig 1 Stationary waves are set up on the string (length 1.2 m) by a vibration generator. The three lowest frequencies at which stationary waves are produced are 25 Hz, 50 Hz and 75 Hz. a) Draw the appearance of the 50 Hz stationary wave. b) What is the wavelength of the wave on the string at 50 Hz? c) The stationary wave is produced by progressive waves travelling in opposite directions. Calculate the speed of the progressive wave along the string. d) If the tension of the string is 10.0 N, calculate the mass per unit length of the string, stating clearly the unit it is measured in.