3. The wave pulses shown in Figure Q15.3 travel along the same string. Rank in order, from largest to smallest, their wave speeds v1, U2, and U3. Explain. Figure Q15.3 V1 N V2 V34. A loudspeaker emits a sound wave at a particular frequency. If the intensity of the wave is doubled, how does the speed of the wave change? What if the frequency is doubled?9. Figure Q15.2 shows a history graph of the motion of one point on a string as a wave traveling to the left passes by. Sketch a snapshot graph for this wave. Figure Q15.910. Figure Q15.10 shows a history graph and a snapshot graph for a wave pulse on a string. They describe the same wave from two perspectives. a. In which direction is the wave traveling? Explain. b. What is the speed of this wave? Figure Q15.10 Snapshot at t = 0.01 s History at x = 2 cm x (cm) t (s) 4 2 0.02 0.04 0.06