Question

6. 110 pts) The displacement of a vibrating string versus position along the string is shown in the figure. The periodic wave has a speed of 12.0 cm/s. What is the amplitude of the wave? Your answer What is the wavelength of the wave? Your answer What is the frequency of this wave? Your answer 7. 110 pts Two pulses (with identical shape) travel toward each other on a string, as shown in the drawing. Which one of the following statements concerning this situation is true? lal The pulses will reflect from each other. [b] The pulses will diffract from each other. Ic The pulses will interfere to produce a standing wave. dj The pulses will pass through each other and produce beats. Tel At the point the pulses passing through each other, they will interfere destructively. 8. [10 pts Consider the figures depicting rectangular pulses on a string. Which pair of pulses must be superimposed to give the situation as shown in 5? Your answer and Which pair of pulses will produce the largest amplitude when superimposed? Your answer and

Answer 1

Here we apply concept of transverse wave and standing wave

) 2 Wave speed, v= 12cm/sec. from diagram, Amplitude of wave is A = 4 mm from tiagram, Wavelength of wave is 6 cm We known velocity (62= frequency (flatalavelength - frequency (f) = velocity (1) Wavelength (d) * f = 120 cm/ 6cm afe 2 Hz

Two waves direction are of moving are out in opposite of phase As no barrier so pulses will go unaffected. But in intermediate state they will form standing wave. standing Wave ... option Cad is incorrect. They will not reflead. (6) als incorrect es no diffraction phenomena &2 is correct as standing wave forme Fa ) Pulse will pass through each other but no beats as frequency of both may be name incorrect ! en As showed no destrue tive interference so (c) is correct.