PhysicsLAB NY Regents
June 2015, Part 2

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26. As a longitudinal wave moves through a medium, the particles of the medium



 
27. Wind blowing across suspended power lines may cause the power lines to vibrate at their natural frequency. This often produces audible sound waves. This phenomenon, often called an Aeolian harp, is an example of
 
28. A student listens to music from a speaker in an adjoining room, as represented in the diagram below.
 
 
She notices that she does not have to be directly in front of the doorway to hear the music. This spreading of sound waves beyond the doorway is an example of
 
29. What is the minimum energy required to ionize a hydrogen atom in the n = 3 state?
 
Base your answers to questions 30 and 31 on the diagram below and on your knowledge of physics. The diagram represents two small, charged, identical metal spheres, A and B that are separated by a distance of 2.0 meters.
 
 
30.  What is the magnitude of the electrostatic force exerted by sphere A on sphere B?
 
31. If the two spheres were touched together and then separated, the charge on sphere A would be
 
32. The horn of a moving vehicle produces a sound of constant frequency. Two stationary observers, A and C, and the vehicle’s driver, B, positioned as represented in the diagram below, hear the sound of the horn.
 
 
Compared to the frequency of the sound of the horn heard by driver B, the frequency heard by observer A is



 
33. A different force is applied to each of four different blocks on a frictionless, horizontal surface. In which diagram does the block have the greatest inertia 2.0 seconds after starting from rest?
 
34. The diagram below shows a ray of monochromatic light incident on a boundary between air and glass.
 
 
Which ray best represents the path of the reflected light ray?
 
35 Two pulses approach each other in the same medium. The diagram below represents the displacements caused by each pulse.
 
 
Which diagram best represents the resultant displacement of the medium as the pulses pass through each other?
 
36. The diameter of an automobile tire is closest to
 
37. The vector diagram below represents the velocity of a car traveling 24 meters per second 35° east of north.
 
 
What is the magnitude of the component of the car’s velocity that is directed eastward?
 
38. Without air resistance, a kicked ball would reach a maximum height of 6.7 meters and land 38 meters away. With air resistance, the ball would travel



 
39. A car is moving with a constant speed of 20. meters per second. What total distance does the car travel in 2.0 minutes?
 
40. A car, initially traveling at 15 meters per second north, accelerates to 25 meters per second north in 4.0 seconds. The magnitude of the average acceleration is
 
41. An object is in equilibrium. Which force vector diagram could represent the force(s) acting on the object?
 
42. Which combination of fundamental units can be used to express the amount of work done on an object?
 
43. Which graph best represents the relationship between the potential energy stored in a spring and the change in the spring’s length from its equilibrium position?
 
44. An electric motor has a rating of 4.0 × 102 watts. How much time will it take for this motor to lift a 50.-kilogram mass a vertical distance of 8.0 meters? [Assume 100% efficiency.]
 
45. A compressed spring in a toy is used to launch a 5.00-gram ball. If the ball leaves the toy with an initial horizontal speed of 5.00 meters per second, the minimum amount of potential energy stored in the compressed spring was
 
46. A ray of yellow light (f = 5.09 × 1014 Hz) travels at a speed of 2.04 × 108 meters per second in
 
47. A blue-light photon has a wavelength of 4.80 × 10−7 meter. What is the energy of the photon?
 
48. The graph below represents the relationship between the force exerted on an elevator and the distance the elevator is lifted.
 
 
How much total work is done by the force in lifting the elevator from 0.0 m to 9.0 m?
 
49. The diagram below shows waves A and B in the same medium. Compared to wave A, wave B has
 



 
50. What is the quark composition of a proton?
 



 
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