A longitudinal wave is:

1. A longitudinal wave is: • A wave where the oscillation is perpendicular to the direction of motion • A wave where the oscillation is in the same direction as the direction of motion

2. How many nodes and antinodes? • 4, 5 • 5, 8 • 5, 4 • 4, 8

3. If the amplitude is twice as big, which of the following is true of a pendulum? • The pendulum swings twice as far away from the center • Its period is twice as long • Its frequency is twice as high • It must have twice the mass

4. In any system in simple harmonic motion, the restoring force acting on the mass in the system is proportional to • Displacement • The length of a pendulum • The mass • frequency

5. Which of the following sources of sound has the shortest wavelength? • A female soprano singer at 2,000 Hz • A bass guitar at 150 Hz • A male voice at 500 Hz • The rumble of thunder at 75 Hz

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7. In an oscillating mass-spring system, the velocity of the mass is greatest when the mass is • At the point of maximum displacement • Halfway between the equilibrium point and maximum displacement • At a point where acceleration is greatest • At the equilibrium point

8. Two successive crests of a transverse wave are 1.20 m apart. Eight crests pass a given point every 12.0 s. What is the wave speed? • 0.667 m/s • 1.80 m/s • 0.800 m/s • 9.60 m/s

9. The period of a pendulum may be decreased by • Shortening its length • Increasing the mass of the bob • Moving its equilibrium point • Decreasing the mass of the bob

10. If the pendulum completes exactly 12 cycles in 2.0 minutes, what is the frequency of the pendulum? • 0.10 Hz • 0. 17 Hz • 6.0 Hz • 10 Hz

11. As the swinging bob of a pendulum moves farther from its equilibrium position, the pendulum’s _________ increases • Frequency • Mass • Restoring force • Length

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13. A The period of this wave is… • 2 seconds • 4 seconds • 6 seconds

14. A The amplitude of this wave is… • 4.8 meters • 4.0 meters • 2.4 meters

15. The GPE of the bob of a swinging pendulum is at its maximum when the bob is at • Maximum displacement • The equilibrium point • The center of its swing • Minimum displacement

16. In a system in simple harmonic motion, the amplitude depends on • Frequency • Wavelength • The position of the equilibrium point • Energy of the system

17. A wave with an amplitude of 0.75 m has the same wavelength as a second wave with an amplitude of 0.53 m. The two waves interfere. What is the amplitude of the resultant wave if the interference is constructive? • 0.22 m • 0.53 m • 0.75 m • 1.28 m

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19. A slinky is stretched to a length of 7 m. All of the following standing wave wavelengths are possible except… • 21 m • 14 m • 7 m • 3.5 m

20. A total of 5 s passes as a child completes one complete swing on a playground swing. The period of the swing is • 1/5 s • 20 s • 5 s • 1 s 10

21. The frequency of a certain pendulum is 0.5 Hz. The period of this pendulum is • 0.2 s • 0.5 s • 2 s • 5 s 10

22. Which of the following factors has the greatest effect on the frequency of a swinging pendulum? • Friction • Amplitude • Mass • Length 10

23. If a given pendulum is moved from Earth to a location where the gravitational acceleration is greater than Earth’s, the frequency of the pendulum’s swing will • Increase • Decrease • Be unchanged • Vary with the mass of the bob 10

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25. You have constructed an oscillating mass-spring system for an experiment. In order to increase the frequency of the system, you could • Decrease the initial displacement • Use a greater mass • Use a spring with a higher spring constant • Increase the period of oscillation 10

26. A wave with an amplitude of 0.75 m has the same wavelength as a second wave with an amplitude of 0.53 m. If the two waves destructively interfere, what is the amplitude of the resultant wave? • 0.22 m • 0.53 m • 0.75 m • 1.28 m 10

27. If the length of a pendulum gets longer, the period of the pendulum: • Gets longer • Gets shorter • Stays the same • Not enough information 10

28. The material through which a mechanical wave travels is • A medium • Empty space • Water • Air 10

29. When a transverse wave passes through water, water molecules are displaced • Permanently in the direction of the wave motion • Permanently in a direction perpendicular to the wave • Temporarily in the direction of the wave motion • Temporarily in a direction perpendicular to the wave 10

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31. A wave that is produced by a single motion that does not repeat is a ________. • Transverse wave • Continuous wave • Pulse • Compression 10

32. The distance between two successive troughs of a transverse wave is the wave’s • Amplitude • Wavelength • Frequency • Rarefaction 10

33. Suppose you are dangling your foot in a swimming pool, making ripples (waves) by moving your foot up and down. What could you do to make the ripples travel faster through the water? • Move your foot up and down more frequently • Move your foot up and down less frequently • Move your foot up and down more strongly • None of the above 10

34. When a wave on a rope strikes a free boundary, the wave is • Reflected and inverted • Reflected but not inverted • Not reflection • absorbed 10

35. A wave is passing through a uniform medium. As the frequency of this wave increases, its wavelength • Depends on amplitude • Decreases • Increases • Does not change 10

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37. If the amplitude of a mechanical wave is tripled, the rate of energy transfer of the wave is _____ . • Increased by a factor of 9 • Decreased by a factor of 9 • Increased by a factor of 3 • Decreased by a factor of 3 10

38. A ____ wave travels through a medium as a series of compressions and rarefactions. • Sine • Longitudinal • Pulse • Transverse 10

39. When two transverse waves traveling through a medium meet and exactly coincide, the resulting displacement of the medium • Is the sum of the displacements of each wave • Is zero • Is always greater than the displacement of either wave alone • Is always destructive 10

40. When two waves having displacements in opposite directions meet, ____ occurs. • Complete destructive interference • No interference • Constructive interference • Destructive interference 10

41. A wave pattern on a stretched string appears to be stationary. This wave pattern is an example of • A longitudinal wave • A non-periodic wave • A pulse wave • A standing wave 10

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43. In a standing wave on a vibrating string, a point that appears to remain stationary is a(n) • Antinode • Point of constructive interference • Node • rarefaction 10

44. An ocean wave has a frequency of 2 Hz and a speed of 20 m/s. What is the wavelength of this wave? • 0.1 m • 5 m • 10 m • 40 m 10

45. Two waves meet and interfere constructively. Which one of the following factors increases? • Period • Frequency • Wavelength • None of the above 10

46. You sit in the audience and listen to a concert band play. Which instruments sound reaches your ears first, the flute or the trombone? • The flute • The trombone • They reach your ears at the same time. 10

47. If a 48 kg mass oscillates on a spring with a spring constant of 12 N/m, what is the period of the oscillation? • 8π seconds • 4π seconds • π seconds • π/2 seconds 10

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49. A certain oscillating mass-spring system has a period of 1.2 s with a 1.0 kg mass. What will the period be when a 4.0 kg mass is substituted for the 1.0 kg mass? • 4.8 s • 2.4 s • 0.6 s • 0.3 s 10

50. The spring constant in a given oscillating mass-spring system may be changed by • Increasing the mass • Decreasing the mass • Decreasing the initial displacement • None of the above 10