QuickCheck 1.5. An ant zig-zags back and forth on a picnic table as shown. The ant s distance traveled and displacement are

Transcription

1 APPY1 Review

2 QuickCheck 1.5 An ant zig-zags back and forth on a picnic table as shown. The ant s distance traveled and displacement are A. 50 cm and 50 cm B. 30 cm and 50 cm C. 50 cm and 30 cm D. 50 cm and 50 cm E. 50 cm and 30 cm Slide 1- #

3 QuickCheck 1.5 An ant zig-zags back and forth on a picnic table as shown. The ant s distance traveled and displacement are A. 50 cm and 50 cm B. 30 cm and 50 cm C. 50 cm and 30 cm D. 50 cm and 50 cm E. 50 cm and 30 cm Slide 1- #

4 QuickCheck 1.6 Given vectors and, what is? Slide 1- #

5 QuickCheck 1.6 Given vectors and, what is? A. Slide 1- #

6 QuickCheck 2.7 Which velocity-versus-time graph goes with this position graph? Slide 2- #

7 QuickCheck 2.7 Which velocity-versus-time graph goes with this position graph? C. Slide 2- #

8 QuickCheck 2.20 A cart speeds up toward the origin. What do the position and velocity graphs look like? Slide 2- #

9 QuickCheck 2.20 A cart speeds up toward the origin. What do the position and velocity graphs look like? C. Slide 2- #

10 QuickCheck 3.16 A heavy red ball is released from rest 2.0 m above a flat, horizontal surface. At exactly the same instant, a yellow ball with the same mass is fired horizontally at 3.0 m/s. Which ball hits the ground first? A. The red ball hits first. B. The yellow ball hits first. C. They hit at the same time. Slide 3- #

11 QuickCheck 3.16 A heavy red ball is released from rest 2.0 m above a flat, horizontal surface. At exactly the same instant, a yellow ball with the same mass is fired horizontally at 3.0 m/s. Which ball hits the ground first? A. The red ball hits first. B. The yellow ball hits first. C. They hit at the same time. Slide 3- #

12 QuickCheck 3.20 A car is traveling around a curve at a steady 45 mph. Which vector shows the direction of the car s acceleration? E. The acceleration is zero. Slide 3- #

13 QuickCheck 3.20 A car is traveling around a curve at a steady 45 mph. Which vector shows the direction of the car s acceleration? B. E. The acceleration is zero. Slide 3- #

14 QuickCheck 4.4 A bobsledder pushes her sled across horizontal snow to get it going, then jumps in. After she jumps in, the sled gradually slows to a halt. What forces act on the sled just after she s jumped in? A. Gravity and kinetic friction B. Gravity and a normal force C. Gravity and the force of the push D. Gravity, a normal force, and kinetic friction E. Gravity, a normal force, kinetic friction, and the force of the push Slide 4- #

15 QuickCheck 4.4 A bobsledder pushes her sled across horizontal snow to get it going, then jumps in. After she jumps in, the sled gradually slows to a halt. What forces act on the sled just after she s jumped in? A. Gravity and kinetic friction B. Gravity and a normal force C. Gravity and the force of the push D. Gravity, a normal force, and kinetic friction E. Gravity, a normal force, kinetic friction, and the force of the push Slide 4- #

16 QuickCheck 4.9 An object on a rope is lowered at constant speed. Which is true? A. The rope tension is greater than the object s weight. B. The rope tension equals the object s weight. C. The rope tension is less than the object s weight. D. The rope tension can t be compared to the object s weight. Slide 4- #

17 QuickCheck 4.9 An object on a rope is lowered at constant speed. Which is true? Constant velocity Zero acceleration A. The rope tension is greater than the object s weight. B. The rope tension equals the object s weight. C. The rope tension is less than the object s weight. D. The rope tension can t be compared to the object s weight. Slide 4- #

18 QuickCheck 4.14 A car is parked on a hill. Which is the correct free-body diagram? Slide 4- #

19 QuickCheck 4.14 A car is parked on a hill. Which is the correct free-body diagram? C. Slide 4- #

20 QuickCheck 4.10 An object on a rope is lowered at a steadily decreasing speed. Which is true? A. The rope tension is greater than the object s weight. B. The rope tension equals the object s weight. C. The rope tension is less than the object s weight. D. The rope tension can t be compared to the object s weight. Slide 4- #

21 QuickCheck 4.10 An object on a rope is lowered at a steadily decreasing speed. Which is true? Decreasing downward velocity Acceleration vector points up points up A. The rope tension is greater than the object s weight. B. The rope tension equals the object s weight. C. The rope tension is less than the object s weight. D. The rope tension can t be compared to the object s weight. Slide 4- #

22 QuickCheck 4.17 A mosquito runs head-on into a truck. Splat! Which is true during the collision? A. The mosquito exerts more force on the truck than the truck exerts on the mosquito. B. The truck exerts more force on the mosquito than the mosquito exerts on the truck. C. The mosquito exerts the same force on the truck as the truck exerts on the mosquito. D. The truck exerts a force on the mosquito but the mosquito does not exert a force on the truck. E. The mosquito exerts a force on the truck but the truck does not exert a force on the mosquito. Slide 4- #

23 QuickCheck 4.17 A mosquito runs head-on into a truck. Splat! Which is true during the collision? A. The mosquito exerts more force on the truck than the truck exerts on the mosquito. B. The truck exerts more force on the mosquito than the mosquito exerts on the truck. C. The mosquito exerts the same force on the truck as the truck exerts on the mosquito. D. The truck exerts a force on the mosquito but the mosquito does not exert a force on the truck. E. The mosquito exerts a force on the truck but the truck does not exert a force on the mosquito. Slide 4- #

24 QuickCheck 5.3 A box is being pulled to the right at steady speed by a rope that angles upward. In this situation: A. n > mg B. n = mg C. n < mg D. n = 0 E. Not enough information to judge the size of the normal force Slide 5- #

25 QuickCheck 5.3 A box is being pulled to the right at steady speed by a rope that angles upward. In this situation: A. n > mg B. n = mg C. n < mg D. n = 0 E. Not enough information to judge the size of the normal force Slide 5- #

26 QuickCheck 5.8 A box with a weight of 100 N is at rest. It is then pulled by a 30 N horizontal force. Does the box move? A. Yes B. No C. Not enough information to say Slide 5- #

27 QuickCheck 5.8 A box with a weight of 100 N is at rest. It is then pulled by a 30 N horizontal force. Does the box move? A. Yes B. No C. Not enough 30 N information < f s max = 40 to N say Slide 5- #

28 QuickCheck 5.12 Boxes A and B are being pulled to the right on a frictionless surface; the boxes are speeding up. Box A has a larger mass than Box B. How do the two tension forces compare? A. T 1 > T 2 B. T 1 = T 2 C. T 1 < T 2 D. Not enough information to tell Slide 5- #

29 QuickCheck 5.12 Boxes A and B are being pulled to the right on a frictionless surface; the boxes are speeding up. Box A has a larger mass than Box B. How do the two tension forces compare? A. T 1 > T 2 B. T 1 = T 2 C. T 1 < T 2 D. Not enough information to tell Slide 5- #

30 QuickCheck 5.14 The two masses are at rest. The pulleys are frictionless. The scale is in kg. The scale reads A. 0 kg B. 5 kg C. 10 kg Slide 5- #

31 QuickCheck 5.14 The two masses are at rest. The pulleys are frictionless. The scale is in kg. The scale reads A. 0 kg B. 5 kg C. 10 kg Slide 5- #

32 QuickCheck 6.3 A ball at the end of a string is being swung in a horizontal circle. What is the direction of the acceleration of the ball? A. Tangent to the circle, in the direction of the ball s motion B. Toward the center of the circle Slide 6- #

33 QuickCheck 6.3 A ball at the end of a string is being swung in a horizontal circle. What is the direction of the acceleration of the ball? A. Tangent to the circle, in the direction of the ball s motion B. Toward the center of the circle Slide 6- #

34 QuickCheck 6.9 A coin is rotating on a turntable; it moves without sliding. At the instant shown, suppose the frictional force disappeared. In what direction would the coin move? Slide 6- #

35 QuickCheck 6.9 A coin is rotating on a turntable; it moves without sliding. At the instant shown, suppose the frictional force disappeared. In what direction would the coin move? A Slide 6- #

36 QuickCheck 6.13 A coin sits on a turntable as the table steadily rotates counterclockwise. What force or forces act in the plane of the turntable? Slide 6- #

37 QuickCheck 6.13 A coin sits on a turntable as the table steadily rotates counterclockwise. What force or forces act in the plane of the turntable? A. Slide 6- #

38 QuickCheck 6.16 The force of Planet Y on Planet X is the magnitude of. A. One quarter B. One half C. The same as D. Twice E. Four times 2M Planet X M Planet Y Slide 6- #

39 QuickCheck 6.16 The force of Planet Y on Planet X is the magnitude of. A. One quarter B. One half C. The same as D. Twice E. Four times 2M Planet X Newton s third law M Planet Y Slide 6- #

40 QuickCheck 6.18 Planet X has free-fall acceleration 8 m/s 2 at the surface. Planet Y has twice the mass and twice the radius of planet X. On Planet Y A. g = 2 m/s 2 B. g = 4 m/s 2 C. g = 8 m/s 2 D. g = 16 m/s 2 E. g = 32 m/s 2 Slide 6- #

41 QuickCheck 6.18 Planet X has free-fall acceleration 8 m/s 2 at the surface. Planet Y has twice the mass and twice the radius of planet X. On Planet Y A. g = 2 m/s 2 B. g = 4 m/s 2 C. g = 8 m/s 2 D. g = 16 m/s 2 E. g = 32 m/s 2 Slide 6- #

42 QuickCheck 6.22 A 60-kg person stands on each of the following planets. On which planet is his or her weight the greatest? Slide 6- #

43 QuickCheck 6.22 A 60-kg person stands on each of the following planets. On which planet is his or her weight the greatest? A Slide 6- #

44 QuickCheck 7.2 Rasheed and Sofia are riding a merry-go-round that is spinning steadily. Sofia is twice as far from the axis as is Rasheed. Sofia s angular velocity is that of Rasheed. A. Half B. The same as C. Twice D. Four times E. We can t say without knowing their radii. Slide 7- #

45 QuickCheck 7.2 Rasheed and Sofia are riding a merry-go-round that is spinning steadily. Sofia is twice as far from the axis as is Rasheed. Sofia s angular velocity is that of Rasheed. A. Half B. The same as C. Twice D. Four times E. We can t say without knowing their radii. Slide 7- #

46 QuickCheck 7.3 Rasheed and Sofia are riding a merry-go-round that is spinning steadily. Sofia is twice as far from the axis as is Rasheed. Sofia s speed is that of Rasheed. A. Half B. The same as C. Twice D. Four times E. We can t say without knowing their radii. Slide 7- #

47 QuickCheck 7.3 Rasheed and Sofia are riding a merry-go-round that is spinning steadily. Sofia is twice as far from the axis as is Rasheed. Sofia s speed is that of Rasheed. A. Half B. The same as C. Twice v = ωr D. Four times E. We can t say without knowing their radii. Slide 7- #

48 QuickCheck 7.5 The fan blade is slowing down. What are the signs of ω and α? A. ω is positive and α is positive. B. ω is positive and α is negative. C. ω is negative and α is positive. D. ω is negative and α is negative. E. ω is positive and α is zero. Slide 7- #

49 QuickCheck 7.5 The fan blade is slowing down. What are the signs of ω and α? A. ω is positive and α is positive. B. ω is positive and α is negative. C. ω is negative and α is positive. D. ω is negative and α is negative. E. ω is positive and α is zero. Slowing down means that ω and α have opposite signs, not that α is negative. Slide 7- #

50 QuickCheck 7.7 This is the angular velocity graph of a wheel. How many revolutions does the wheel make in the first 4 s? A. 1 B. 2 C. 4 D. 6 E. 8 Slide 7- #

51 QuickCheck 7.7 This is the angular velocity graph of a wheel. How many revolutions does the wheel make in the first 4 s? A. 1 B. 2 C. 4 D. 6 E. 8 Δθ = area under the angular velocity curve Slide 7- #

52 QuickCheck 7.10 The four forces shown have the same strength. Which force would be most effective in opening the door? A. Force F 1 B. Force F 2 C. Force F 3 D. Force F 4 E. Either F 1 or F 3 Slide 7- #

53 QuickCheck 7.10 The four forces shown have the same strength. Which force would be most effective in opening the door? A. Force F 1 B. Force F 2 C. Force F 3 D. Force F 4 E. Either F 1 or F 3 Your intuition likely led you to choose F 1. The reason is that F 1 exerts the largest torque about the hinge. Slide 7- #

54 QuickCheck 8.2 What does the scale read? A. 500 N B N C N D N Answering this requires reasoning, not calculating. Slide 8- #

55 QuickCheck 8.2 What does the scale read? A. 500 N B N C N D N Answering this requires reasoning, not calculating. Slide 8- #

56 QuickCheck 8.3 The restoring force of three springs is measured as they are stretched. Which spring has the largest spring constant? Slide 8- #

57 QuickCheck 8.3 The restoring force of three springs is measured as they are stretched. Which spring has the largest spring constant? A. Steepest slope. Takes lots of force for a small displacement. Slide 8- #

58 QuickCheck 9.1 The cart s change of momentum Δp x is A. 20 kg m/s B. 10 kg m/s C. 0 kg m/s D. 10 kg m/s E. 30 kg m/s Slide 9- #

59 QuickCheck 9.1 The cart s change of momentum Δp x is A. 20 kg m/s B. 10 kg m/s C. 0 kg m/s D. 10 kg m/s E. 30 kg m/s Δp x = 10 kg m/s ( 20 kg m/s) = 30 kg m/s Negative initial momentum because motion is to the left and v x < 0. Slide 9- #

60 QuickCheck 9.6 Two 1.0 kg stationary cue balls are struck by cue sticks. The cues exert the forces shown. Which ball has the greater final speed? A. Ball 1 B. Ball 2 C. Both balls have the same final speed. Slide 9- #

61 QuickCheck 9.6 Two 1.0 kg stationary cue balls are struck by cue sticks. The cues exert the forces shown. Which ball has the greater final speed? A. Ball 1 B. Ball 2 C. Both balls have the same final speed. Slide 9- #

62 QuickCheck 9.8 A mosquito and a truck have a head-on collision. Splat! Which has a larger change of momentum? A. The mosquito B. The truck C. They have the same change of momentum. D. Can t say without knowing their initial velocities. Slide 9- #

63 QuickCheck 9.8 A mosquito and a truck have a head-on collision. Splat! Which has a larger change of momentum? A. The mosquito B. The truck C. They have the same change of momentum. D. Can t say without knowing their initial velocities. Momentum is conserved, so Δp mosquito + Δp truck = 0. Equal magnitude (but opposite sign) changes in momentum. Slide 9- #

64 QuickCheck 9.9 The two boxes are sliding along a frictionless surface. They collide and stick together. Afterward, the velocity of the two boxes is A. 2 m/s to the left B. 1 m/s to the left C. 0 m/s, at rest D. 1 m/s to the right E. 2 m/s to the right Slide 9- #

65 QuickCheck 9.10 The two boxes are on a frictionless surface. They had been sitting together at rest, but an explosion between them has just pushed them apart. How fast is the 2-kg box going? A. 1 m/s B. 2 m/s C. 4 m/s D. 8 m/s E. There s not enough information to tell. Slide 9- #

66 QuickCheck 10.5 Robert pushes the box to the left at constant speed. In doing so, Robert does work on the box. A. Positive B. Negative C. Zero Slide 10- #

67 QuickCheck 10.5 Robert pushes the box to the left at constant speed. In doing so, Robert does work on the box. A. Positive B. Negative C. Zero Force is in the direction of displacement positive work Slide 10- #

68 QuickCheck 10.7 Which force below does the most work? All three displacements are the same. A. The 10 N force B. The 8 N force C. The 6 N force D. They all do the same work. sin60 = 0.87 cos60 = 0.50 Slide 10- #

69 QuickCheck 10.7 Which force below does the most work? All three displacements are the same. A. The 10 N force B. The 8 N force C. The 6 N force D. They all do the same work. sin60 = 0.87 cos60 = 0.50 Slide 10- #

70 QuickCheck Each of the boxes shown is pulled for 10 m across a level, frictionless floor by the force given. Which box experiences the greatest change in its kinetic energy? Slide 10- #

71 QuickCheck Each of the boxes shown is pulled for 10 m across a level, frictionless floor by the force given. Which box experiences the greatest change in its kinetic energy? D Work-energy equation: K = W = Fd. All have same d, so largest work (and hence largest K) corresponds to largest force. Slide 10- #

72 QuickCheck Starting from rest, a marble first rolls down a steeper hill, then down a less steep hill of the same height. For which is it going faster at the bottom? A. Faster at the bottom of the steeper hill B. Faster at the bottom of the less steep hill C. Same speed at the bottom of both hills D. Can t say without knowing the mass of the marble Slide 10- #

73 QuickCheck Starting from rest, a marble first rolls down a steeper hill, then down a less steep hill of the same height. For which is it going faster at the bottom? A. Faster at the bottom of the steeper hill B. Faster at the bottom of the less steep hill C. Same speed at the bottom of both hills D. Can t say without knowing the mass of the marble Slide 10- #

74 QuickCheck A hockey puck sliding on smooth ice at 4 m/s comes to a 1-m-high hill. Will it make it to the top of the hill? A. Yes B. No C. Can t answer without knowing the mass of the puck D. Can t say without knowing the angle of the hill Slide 10- #

75 QuickCheck A hockey puck sliding on smooth ice at 4 m/s comes to a 1-m-high hill. Will it make it to the top of the hill? A. Yes B. No C. Can t answer without knowing the mass of the puck D. Can t say without knowing the angle of the hill Slide 10- #

76 QuickCheck Four students run up the stairs in the time shown. Which student has the largest power output? Slide 10- #

77 QuickCheck Four students run up the stairs in the time shown. Which student has the largest power output? B. Slide 10- #

78 QuickCheck 14.1 A mass oscillates on a horizontal spring with period T = 2.0 s. What is the frequency? A Hz B. 1.0 Hz C. 2.0 Hz D. 3.0 Hz E. 4.0 Hz Slide 14- #

79 QuickCheck 14.1 A mass oscillates on a horizontal spring with period T = 2.0 s. What is the frequency? A Hz B. 1.0 Hz C. 2.0 Hz D. 3.0 Hz E. 4.0 Hz Slide 14- #

80 QuickCheck 14.5 A mass oscillates on a horizontal spring with period T = 2.0 s. If the amplitude of the oscillation is doubled, the new period will be A. 1.0 s B. 1.4 s C. 2.0 s D. 2.8 s E. 4.0 s Slide 14- #

81 QuickCheck 14.5 A mass oscillates on a horizontal spring with period T = 2.0 s. If the amplitude of the oscillation is doubled, the new period will be A. 1.0 s B. 1.4 s C. 2.0 s D. 2.8 s E. 4.0 s Slide 14- #

82 QuickCheck 14.9 A mass oscillates on a horizontal spring. It s velocity is v x and the spring exerts force F x. At the time indicated by the arrow, A. v x is + and F x is + B. v x is + and F x is C. v x is and F x is 0 D. v x is 0 and F x is + E. v x is 0 and F x is Slide 14- #

83 QuickCheck 14.9 A mass oscillates on a horizontal spring. It s velocity is v x and the spring exerts force F x. At the time indicated by the arrow, A. v x is + and F x is + B. v x is + and F x is C. v x is and F x is 0 D. v x is 0 and F x is + E. v x is 0 and F x is Slide 14- #

84 QuickCheck A block oscillates on a vertical spring. When the block is at the lowest point of the oscillation, it s acceleration a y is A. Negative. B. Zero. C. Positive. Slide 14- #

85 QuickCheck A block oscillates on a vertical spring. When the block is at the lowest point of the oscillation, it s acceleration a y is A. Negative. B. Zero. C. Positive. Slide 14- #

86 QuickCheck 15.1 These two wave pulses travel along the same stretched string, one after the other. Which is true? A. v A > v B B. v B > v A C. v A = v B D. Not enough information to tell Slide 15- #

87 QuickCheck 15.1 These two wave pulses travel along the same stretched string, one after the other. Which is true? A. v A > v B B. v B > v A C. v A = v B D. Not enough information to tell Wave speed depends on the properties of the medium, not on the amplitude of the wave. Slide 15- #

88 QuickCheck 15.5 The graph below shows a snapshot graph of a wave on a string that is moving to the right. A point on the string is noted. Which of the choices is the correct history graph for the subsequent motion of this point? Slide 15- #

89 QuickCheck 15.5 The graph below shows a snapshot graph of a wave on a string that is moving to the right. A point on the string is noted. Which of the choices is the correct history graph for the subsequent motion of this point? B. Slide 15- #

90 QuickCheck 15.7 The period of this wave is A. 1 s B. 2 s C. 4 s D. Not enough information to tell Slide 15- #

91 QuickCheck 15.7 The period of this wave is A. 1 s A sinusoidal wave moves B. 2 s forward one wavelength (2 C. 4 s m) in one period. D. Not enough information to tell Slide 15- #

92 QuickCheck 15.9 For this sinusoidal wave, what is the wavelength? A. 0.5 m B. 1 m C. 2 m D. 4 m Slide 15- #

93 QuickCheck 15.9 For this sinusoidal wave, what is the wavelength? A. 0.5 m B. 1 m C. 2 m D. 4 m Slide 15- #

94 QuickCheck For this sinusoidal wave, what is the frequency? A. 50 Hz B. 100 Hz C. 200 Hz D. 400 Hz Slide 15- #

95 QuickCheck For this sinusoidal wave, what is the frequency? A. 50 Hz B. 100 Hz C. 200 Hz D. 400 Hz Slide 15- #

96 QuickCheck A siren emits a sound wave with frequency f 0. The graph shows the frequency you hear as you stand at rest at x = 0 on the x-axis. Which is the correct description of the siren s motion? A. It moves from left to right and passes you at t = 2 s. B. It moves from right to left and passes you at t = 2 s. C. It moves toward you for 2 s but doesn t reach you, then reverses direction at t = 2 s and moves away. D. It moves away from you for 2 s, then reverses direction at t = 2 s and moves toward you but doesn t reach you. Slide 15- #

97 QuickCheck A siren emits a sound wave with frequency f 0. The graph shows the frequency you hear as you stand at rest at x = 0 on the x-axis. Which is the correct description of the siren s motion? Doppler shift to lower frequency means it s moving away. A. It moves from left to right and passes you at t = 2 s. B. It moves from right to left and passes you at t = 2 s. C. It moves toward you for 2 s but doesn t reach you, then reverses direction at t = 2 s and moves away. D. It moves away from you for 2 s, then reverses direction at t = 2 s and moves toward you but doesn t reach you. Slide 15- #

98 QuickCheck 16.1 Two wave pulses on a string approach each other at speeds of 1 m/s. How does the string look at t = 3 s? Slide 16- #

99 QuickCheck 16.1 Two wave pulses on a string approach each other at speeds of 1 m/s. How does the string look at t = 3 s? C. Slide 16- #

100 QuickCheck 16.2 Two wave pulses on a string approach each other at speeds of 1 m/s. How does the string look at t = 3 s? Slide 16- #

101 QuickCheck 16.2 Two wave pulses on a string approach each other at speeds of 1 m/s. How does the string look at t = 3 s? B. Slide 16- #

102 QuickCheck 16.4 What is the wavelength of this standing wave? A m B. 0.5 m C. 1.0 m D. 2.0 m E. Standing waves don t have a wavelength. Slide 16- #

103 QuickCheck 16.4 What is the wavelength of this standing wave? A m B. 0.5 m C. 1.0 m D. 2.0 m E. Standing waves don t have a wavelength. Slide 16- #

104 QuickCheck 16.5 What is the mode number of this standing wave? A. 4 B. 5 C. 6 D. Can t say without knowing what kind of wave it is Slide 16- #

105 QuickCheck 16.5 What is the mode number of this standing wave? A. 4 B. 5 C. 6 D. Can t say without knowing what kind of wave it is Slide 16- #

106 QuickCheck 16.8 An open-open tube of air has length L. Which graph shows the m = 3 standing wave in this tube? Slide 16- #

107 QuickCheck 16.8 An open-open tube of air has length L. Which graph shows the m = 3 standing wave in this tube? A. Slide 16- #

108 QuickCheck 16.9 An open-closed tube of air of length L has the closed end on the right. Which graph shows the m = 3 standing wave in this tube? Slide 16- #

109 QuickCheck 16.9 An open-closed tube of air of length L has the closed end on the right. Which graph shows the m = 3 standing wave in this tube? C. Slide 16- #

110 QuickCheck Two in-phase sources emit sound waves of equal wavelength and intensity. At the position of the 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. Slide 16- #

111 QuickCheck Two in-phase sources emit sound waves of equal wavelength and intensity. At the position of the 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. Slide 16- #

112 QuickCheck Two speakers emit sounds of nearly equal frequency, as shown. At a point between the two speakers, the sound varies from loud to soft. How much time elapses between two successive loud moments? A. 0.5 s B. 1.0 s C. 2.0 s D. 4.0 s Slide 16- #

113 QuickCheck Two speakers emit sounds of nearly equal frequency, as shown. At a point between the two speakers, the sound varies from loud to soft. How much time elapses between two successive loud moments? A. 0.5 s B. 1.0 s C. 2.0 s D. 4.0 s Slide 16- #

114 QuickCheck You hear 2 beats per second when two sound sources, both at rest, play simultaneously. The beats disappear if source 2 moves toward you while source 1 remains at rest. The frequency of source 1 is 500 Hz. The frequency of source 2 is A. 496 Hz B. 498 Hz C. 500 Hz D. 502 Hz E. 504 Hz Slide 16- #

115 QuickCheck You hear 2 beats per second when two sound sources, both at rest, play simultaneously. The beats disappear if source 2 moves toward you while source 1 remains at rest. The frequency of source 1 is 500 Hz. The frequency of source 2 is A. 496 Hz B. 498 Hz C. 500 Hz D. 502 Hz E. 504 Hz Slide 16- #

116 QuickCheck 20.2 A rod attracts a positively charged hanging ball. The rod is A. Positive. B. Negative. C. Neutral. D. Either A or C. E. Either B or C. Slide 20- #

117 QuickCheck 20.2 A rod attracts a positively charged hanging ball. The rod is A. Positive. B. Negative. C. Neutral. D. Either A or C. E. Either B or C. Slide 20- #

118 QuickCheck In each of the following cases, an identical small, positive charge is placed at the black dot. In which case is the force on the small charge the largest? (All charges shown are of equal magnitude.) Slide 20- #

119 QuickCheck In each of the following cases, an identical small, positive charge is placed at the black dot. In which case is the force on the small charge the largest? (All charges shown are of equal magnitude.) A Slide 20- #

120 QuickCheck Which is the direction of the net force on the charge at the lower left? E. None of these. Slide 20- #

121 QuickCheck Which is the direction of the net force on the charge at the lower left? B. E. None of these. Slide 20- #

122 QuickCheck The direction of the force on charge q is A. Up B. Down C. Left D. Right E. The force on q is zero Slide 20- #

123 QuickCheck The direction of the force on charge q is A. Up B. Down C. Left D. Right E. The force on q is zero Q is slightly closer than +Q. Slide 20- #

124 QuickCheck 22.2 Every minute, 120 C of charge flow through this cross section of the wire. The wire s current is A. 240 A B. 120 A C. 60 A D. 2 A E. Some other value Slide 22- #

125 QuickCheck 22.2 Every minute, 120 C of charge flow through this cross section of the wire. The wire s current is A. 240 A B. 120 A C. 60 A D. 2 A E. Some other value Slide 22- #

126 QuickCheck 22.3 A and B are identical lightbulbs connected to a battery as shown. Which is brighter? A. Bulb A B. Bulb B C. The bulbs are equally bright. Slide 22- #

127 QuickCheck 22.3 A and B are identical lightbulbs connected to a battery as shown. Which is brighter? A. Bulb A B. Bulb B C. The bulbs are equally bright. Conservation of current Slide 22- #

128 QuickCheck 22.4 The wires shown next carry currents as noted. Rate the currents I A, I B, and I C. A. I A > I B > I C B. I B > I A > I C C. I C > I A > I B D. I A > I C > I B E. I C > I B > I A Slide 22- #

129 QuickCheck 22.4 The wires shown next carry currents as noted. Rate the currents I A, I B, and I C. A. I A > I B > I C B. I B > I A > I C C. I C > I A > I B D. I A > I C > I B E. I C > I B > I A Slide 22- #

130 QuickCheck 23.5 Which is the correct circuit diagram for the circuit shown? Slide 23- #

131 QuickCheck 23.5 Which is the correct circuit diagram for the circuit shown? A Slide 23- #

132 QuickCheck 23.6 The diagram below shows a segment of a circuit. What is the current in the 200 Ω resistor? A. 0.5 A B. 1.0 A C. 1.5 A D. 2.0 A E. There is not enough information to decide. Slide 23- #

133 QuickCheck 23.6 The diagram below shows a segment of a circuit. What is the current in the 200 Ω resistor? A. 0.5 A B. 1.0 A C. 1.5 A D. 2.0 A E. There is not enough information to decide. Slide 23- #

134 QuickCheck 23.8 The potential difference across the 10 resistor is A. 30 V B. 20 V C. 15 V D. 10 V E. 5 V Slide 23- #

135 QuickCheck 23.8 The potential difference across the 10 resistor is A. 30 V B. 20 V C. 15 V D. 10 V E. 5 V Slide 23- #

136 QuickCheck What things about the resistors in this circuit are the same for all three? A. Current I B. Potential difference ΔV C. Resistance R D. A and B E. B and C Slide 23- #

137 QuickCheck What things about the resistors in this circuit are the same for all three? A. Current I B. Potential difference ΔV C. Resistance R D. A and B E. B and C Slide 23- #

138 QuickCheck Which resistor dissipates more power? A. The 9 Ω resistor B. The 1 Ω resistor C. They dissipate the same power Slide 23- #

139 QuickCheck Which resistor dissipates more power? A. The 9 Ω resistor B. The 1 Ω resistor C. They dissipate the same power Slide 23- #

140 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23- #

141 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23- #

142 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23- #

143 QuickCheck The battery current I is A. 3 A B. 2 A C. 1 A D. 2/3 A E. 1/2 A Slide 23- #

144 QuickCheck What does the voltmeter read? A. 6 V B. 3 V C. 2 V D. Some other value E. Nothing because this will fry the meter. Slide 23- #

145 QuickCheck What does the voltmeter read? A. 6 V B. 3 V C. 2 V D. Some other value E. Nothing because this will fry the meter. Slide 23- #

146 QuickCheck What does the ammeter read? A. 6 A B. 3 A C. 2 A D. Some other value E. Nothing because this will fry the meter. Slide 23- #

147 QuickCheck What does the ammeter read? A. 6 A B. 3 A C. 2 A D. Some other value E. Nothing because this will fry the meter. Slide 23- #