84 85 e. Write a couple of sentences about the differences and similarities between vertical position- horizontal position grap 86 87 the similarities is that they both show position changes over time, the difference is that one show 88 89 90 5. Loose End, Manual, Damping = None, Tension = Low 91 92 a. Does the wave change shape as it travels? 93 94 b. Does the wave slow down or speed up or neither? 95 96 c. If you increase the tension how does the behavior change? 97 98 d. What happens after the wave gets to the right end? 99

7. Two travelling waves are defined: Y+ = cos(kx-wt) and Y = cos(kx+wt) Calculate the sum, Y+ + , and make sketches of the wave as a function of x for various times (t = 0, T/4, T/2, etc). Describe the motion of the wave. What is the repetitive period?

A musician strikes the strings of a guitar such that they vibrate with twice the amplitude. a. Explain why this requires an energy input greater than twice the original value.  b. Explain why the sound leaving the string will not result in a decibel level that is twice as great.

Two rocks are simultaneously dropped into a pond, creating the ripples shown. As they overlap, the ripples interfere. At the point marked with a dot, A. The interference is constructive. B. The interference is destructive. C. The interference is somewhere between constructive and destructive. D. There's not enough information to tell about the interference. What is the extra distance As traveled by one wave to the dot compared to the other? Α. Ο C. A 31 D. F. 4 5A B. E. 21 R, R, R I2 I3 Select all loop rules that apply to this circuit. SELECT ALL THAT APPLY A. 0 = -V +1,R2 – 1R1 B. 0 = V2 – 13R3- lR2 – Vị C. 0 = 4R1 – V2 – I3R3 D. 0 = -V – 1R2 + I¼R1 E. 0 = -V2 – I3R3 + 1½R2 +V1 F. 0 = 1, R, +V2 + I,R3 G. 0 = -V +I,R2 + I,Rq H. 0 = V2 + I3R3 + 1,R2 – V1 I. 0 = 1,R1 - V2 + I3R3 J. 0 = -V- I½R2 + I, R1 K. 0 = -V2 + I3R3 + 12R2 - V2 L. 0 = -1,R – V½ – 13R3 wwT ww