I. A transverse wave is travelling in a medium from left to right. The graph shows the distance travelled by the wave (x) and the displacement of the particles in the medium (y). The wave at t = 0 s is shown with a solid line. The dotted line shows the wave 4. a) Use a diagram to help describe the Doppler Effect as produced by a moving wave 0.80 ms later. Calculate: source. Use words as well! a) the speed of the " (mm) wave /4 for (m) b) the frequency 1.5 210 2,5 b) Under what conditions is a wake produced? Use a diagram to illustrate your answer. dignel offT .woled mungnib 2i boblims sion (binomed c) Point 'P' represents a particle in the medium. In what direction is point P moving at this moment in time? 5. An organ pipe which is open at one end is represented in the diagram below. The length 2. Waves in shallow water have a wavelength of 5.0 cm and a speed of 12 cm/s. If they pass of the pipe is / and the frequency of the fundamental (first harmonic) note emitted is 16 Hz. into deep water and their wavelength increases to 8.0 cm, find the speed of the waves in a) Sketch the standing wave produced in the pipe at this frequency. deep water. A sislool '1 3. Complete the diagrams below by showing what happens to the water waves a few seconds later. Label each diagram with the name of the effect observed. c ) b) If the speed of sound in the pipe is 330 m/s, calculate /. 14 SH 081 2 sion ono to c) What is the frequency of the third harmonic note? b ) d 6. Beat frequency can be used to help tune a guitar. Notes of slightly different frequencies will produced a wavering sound or series of beats. If the frequency of one note is 480 Hz and the other is 468 Hz, what is the beat frequency? shallow deep /1