NY Regents
June 2013, Part 2
26. Sound waves are produced by the horn of a truck that is approaching a stationary observer. Compared to the sound waves detected by the driver of the truck, the sound waves detected by the observer have a greater
(1) wavelength
(2) frequency
(3) period
(4) speed
27. The electronvolt is a unit of
(1) energy
(2) charge
(3) electric field strength
(4) electric potential difference
28. Which particle would produce a magnetic field?
(1) a neutral particle moving in a straight line
(2) a neutral particle moving in a circle
(3) a stationary charged particle
(4) a moving charged particle
29. A physics student takes her pulse and determines that her heart beats periodically 60 times in 60 seconds. The period of her heartbeat is
(1) 1 Hz
(2) 60 Hz
(3) 1 s
(4) 60 s
30. Moving 4.0 coulombs of charge through a circuit requires 48 joules of electric energy. What is the potential difference across this circuit?
(1) 190 V
(2) 48 V
(3) 12 V
(4) 4.0 V
31. The diagram below shows currents in a segment of an electric circuit.
What is the reading of ammeter A?
(1) 1 A
(2) 5 A
(3) 9 A
(4) 15 A
32. An electric dryer consumes 6.0 × 10
^{6}
joules of electrical energy when operating at 220 volts for 1.8 × 10
^{3}
seconds. During operation, the dryer draws a current of
(1) 10. A
(2) 15 A
(3) 9.0 × 10
^{2}
A
(4) 3.3 × 10
^{3}
A
33. Which net charge could be found on an object?
(1) +4.80 × 10
^{−19}
C
(2) +2.40 × 10
^{−19 }
C
(3) −2.40 × 10
^{−19}
C
(4) −5.60 × 10
^{−19}
C
34. A photon is emitted as the electron in a hydrogen atom drops from the n = 5 energy level directly to the n = 3 energy level. What is the energy of the emitted photon?
(1) 0.85 eV
(2) 0.97 eV
(3) 1.51 eV
(4) 2.05 eV
35. In a process called pair production, an energetic gamma ray is converted into an electron and a positron. It is not possible for a gamma ray to be converted into two electrons because
(1) charge must be conserved
(2) momentum must be conserved
(3) mass-energy must be conserved
(4) baryon number must be conserved
36. The approximate length of an unsharpened No. 2 pencil is
(1) 2.0 x 10
^{-2}
m
(2) 2.0 x 10
^{-1}
m
(3) 2.0 x 10
^{0}
m
(4) 2.0 x 10
^{1}
m
37. The diagram below shows an 8.0-kilogram cart moving to the right at 4.0 meters per second about to make a head-on collision with a 4.0-kilogram cart moving to the left at 6.0 meters per second.
After the collision, the 4.0-kilogram cart moves to the right at 3.0 meters per second. What is the velocity of the 8.0-kilogram cart after the collision?
(1) 0.50 m/s left
(2) 0.50 m/s right
(3) 5.5 m/s left
(4) 5.5 m/s right
38. Four forces act concurrently on a block on a horizontal surface as shown in the diagram below.
As a result of these forces, the block
(1) moves at constant speed to the right
(2) moves at constant speed to the left
(3) accelerates to the right
(4) accelerates to the left
39. If a motor lifts a 400.-kilogram mass a vertical distance of 10. meters in 8.0 seconds, the minimum power generated by the motor is
(1) 3.2 × 10
^{2}
W
(2) 5.0 × 10
^{2}
W
(3) 4.9 × 10
^{3}
W
(4) 3.2 × 10
^{4}
W
40. A 4.0-kilogram object is accelerated at 3.0 meters per second
^{2}
north by an unbalanced force. The same unbalanced force acting on a 2.0-kilogram object will accelerate this object toward the north at
(1) 12 m/s
^{2}
(2) 6.0 m/s
^{2}
(3) 3.0 m/s
^{2}
(4) 1.5 m/s
^{2}
41. An electron is located in an electric field of magnitude 600. newtons per coulomb. What is the magnitude of the electrostatic force acting on the electron?
(1) 3.75 × 10
^{21}
N
(2) 6.00 × 10
^{2}
N
(3) 9.60 × 10
^{−17}
N
(4) 2.67 × 10
^{−22}
N
42. The current in a wire is 4.0 amperes. The time required for 2.5 × 10
^{19}
electrons to pass a certain point in the wire is
(1) 1.0 s
(2) 0.25 s
(3) 0.50 s
(4) 4.0 s
43. When two point charges of magnitude q
_{1}
and q
_{2}
are separated by a distance, r, the magnitude of the electrostatic force between them is F. What would be the magnitude of the electrostatic force between point charges 2q
_{1}
and 4q
_{2}
when separated by a distance of 2r?
(1) F
(2) 2F
(3) 16F
(4) 4F
44. The composition of a meson with a charge of −1 elementary charge could be
45. Which graph represents the relationship between the kinetic energy and the speed of a freely falling object?
46. Which diagram represents the electric field between two oppositely charged conducting spheres?
47. Which graph represents the relationship between the magnitude of the gravitational force, F
_{g}
, between two masses and the distance, r, between the centers of the masses?
48. The diagram below shows two waves traveling toward each other at equal speed in a uniform medium.
When both waves are in the region between points A and B, they will undergo
(1) diffraction
(2) the Doppler effect
(3) destructive interference
(4) constructive interference
49. The diagram below shows a series of straight wave fronts produced in a shallow tank of water approaching a small opening in a barrier.
Which diagram represents the appearance of the wave fronts after passing through the opening in the barrier?
50. The graph below represents the relationship between energy and the equivalent mass from which it can be converted.
The slope of this graph represents
(1) c
(2) c
^{2}
(3) g
(4) g
^{2}
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