Physical Setting 15 June 2017 Questions Answer Keys

Physical Setting 15 June 2017 Questions Answer Keys

The University of the State of New York
Regents High School Examination
Physical Setting
Physics
Thursday, June 15, 2017 — 1:15 to 4:15 p.m., only

Directions (1–30): For each statement or question, choose the word or expression that, of those given, best completes the statement or answers the question. Some questions may require the use of the 2006 Edition Reference Tables for Physical Setting/Physics. Record your answers on your separate answer sheet.

1. A unit used for a vector quantity is

  • (1) watt
  • (2) newton
  • (3) kilogram
  • (4) second

2. A displacement vector with a magnitude of 20. meters could have perpendicular components with magnitudes of

  • (1) 10. m and 10. m
  • (2) 12 m and 8.0 m
  • (3) 12 m and 16 m
  • (4) 16 m and 8.0 m

3. A hiker travels 1.0 kilometer south, turns and travels 3.0 kilometers west, and then turns and travels 3.0 kilometers north. What is the total distance traveled by the hiker?

  • (1) 3.2 km
  • (2) 3.6 km
  • (3) 5.0 km
  • (4) 7.0 km

4. A car with an initial velocity of 16.0 meters per second east slows uniformly to 6.0 meters per second east in 4.0 seconds. What is the acceleration of the car during this 4.0-second interval?

  • (1) 2.5 m/s2 west
  • (2) 2.5 m/s2 east
  • (3) 4.0 m/s2 west
  • (4) 4.0 m/s2 east

5. On the surface of planet X, a body with a mass of 10. kilograms weighs 40. newtons. The magnitude of the acceleration due to gravity on the surface of planet X is

  • (1) 4.0 × 103 m/s2
  • (2) 4.0 × 102 m/s2
  • (3) 9.8 m/s2
  • (4) 4.0 m/s2

6. A car traveling in a straight line at an initial speed of 8.0 meters per second accelerates uniformly to a speed of 14 meters per second over a distance of 44 meters. What is the magnitude of the acceleration of the car?

  • (1) 0.41 m/s2
  • (2) 1.5 m/s2
  • (3) 3.0 m/s2
  • (4) 2.2 m/s2

7. An object starts from rest and falls freely for 40. meters near the surface of planet P. If the time of fall is 4.0 seconds, what is the magnitude of the acceleration due to gravity on planet P?

  • (1) 0 m/s2
  • (2) 1.3 m/s2
  • (3) 5.0 m/s2
  • (4) 10. m/s2

8. If a block is in equilibrium, the magnitude of the block’s acceleration is

  • (1) zero
  • (2) decreasing
  • (3) increasing
  • (4) constant, but not zero

9. The diagram below shows a light ray striking a plane mirror.

Physics 15 June 2017 Questions Answer Keys

What is the angle of reflection?

  • (1) 30.°
  • (2) 60.°
  • (3) 90.°
  • (4) 120.°

10. An electric field exerts an electrostatic force of magnitude 1.5 × 10−14 newton on an electron within the field. What is the magnitude of the electric field strength at the location of the electron?

  • (1) 2.4 × 10−33 N/C
  • (2) 1.1 × 10−5 N/C
  • (3) 9.4 × 104 N/C
  • (4) 1.6 × 1016 N/C

11. A 7.0-kilogram cart, A, and a 3.0-kilogram cart, B, are initially held together at rest on a horizontal, frictionless surface. When a compressed spring attached to one of the carts is released, the carts are pushed apart. After the spring is released, the speed of cart B is 6.0 meters per second, as represented in the diagram below.

Physics 15 June 2017 Questions Answer Keys

What is the speed of cart A after the spring is released?

  • (1) 14 m/s
  • (2) 6.0 m/s
  • (3) 3.0 m/s
  • (4) 2.6 m/s

12. An electron in a magnetic field travels at constant speed in the circular path represented in the diagram below.

Physics 15 June 2017 Questions Answer Keys

Which arrow represents the direction of the net force acting on the electron when the electron is at position A?

↑              ↓             ←             →

                                                                    (1)            (2)           (3)            (4)

13. The potential difference between two points, A and B, in an electric field is 2.00 volts. The energy required to move a charge of 8.00 × 10−19 coulomb from point A to point B is

  • (1) 4.00 × 10−19 J
  • (2) 1.60 × 10−18 J
  • (3) 6.25 × 1017 J
  • (4) 2.50 × 1018 J

14. Which statement describes the gravitational force and the electrostatic force between two charged particles?

  • (1) The gravitational force may be either attractive or repulsive, whereas the electrostatic force must be attractive.
  • (2) The gravitational force must be attractive, whereas the electrostatic force may be either attractive or repulsive.
  • (3) Both forces may be either attractive or repulsive.
  • (4) Both forces must be attractive.

15. An electrostatic force exists between two +3.20 × 10−19-coulomb point charges separated by a distance of 0.030 meter. As the distance between the two point charges is decreased, the electrostatic force of

  • (1) attraction between the two charges decreases
  • (2) attraction between the two charges increases
  • (3) repulsion between the two charges decreases
  • (4) repulsion between the two charges increases

16. What is the energy of the photon emitted when an electron in a mercury atom drops from energy level f to energy level b?

  • (1) 8.42 eV
  • (2) 5.74 eV
  • (3) 3.06 eV
  • (4) 2.68 eV

17. An observer counts 4 complete water waves passing by the end of a dock every 10. seconds. What is the frequency of the waves?

  • (1) 0.40 Hz
  • (2) 2.5 Hz
  • (3) 40. Hz
  • (4) 4.0 Hz

18. Copper is a metal commonly used for electrical wiring in houses. Which metal conducts electricity better than copper at 20°C?

  • (1) aluminum
  • (2) gold
  • (3) nichrome
  • (4) silver

19. A motor does 20. joules of work on a block, accelerating the block vertically upward. Neglecting friction, if the gravitational potential energy of the block increases by 15 joules, its kinetic energy

  • (1) decreases by 5 J
  • (2) increases by 5 J
  • (3) decreases by 35 J
  • (4) increases by 35 J

20. When only one lightbulb blows out, an entire string of decorative lights goes out. The lights in this string must be connected in

  • (1) parallel with one current pathway
  • (2) parallel with multiple current pathways
  • (3) series with one current pathway
  • (4) series with multiple current pathways

21. An electric toaster is rated 1200 watts at 120 volts. What is the total electrical energy used to operate the toaster for 30. seconds?

  • (1) 1.8 × 103 J
  • (2) 3.6 × 103 J
  • (3) 1.8 × 104 J
  • (4) 3.6 × 104 J

22. What is the rate at which work is done in lifting a 35-kilogram object vertically at a constant speed of 5.0 meters per second?

  • (1) 1700 W
  • (2) 340 W
  • (3) 180 W
  • (4) 7.0 W

23. When a wave travels through a medium, the wave transfers

  • (1) mass, only
  • (2) energy, only
  • (3) both mass and energy
  • (4) neither mass nor energy

24. Glass may shatter when exposed to sound of a particular frequency. This phenomenon is an example of

  • (1) refraction
  • (2) diffraction
  • (3) resonance
  • (4) the Doppler effect

25. Which waves require a material medium for transmission?

  • (1) light waves
  • (2) radio waves
  • (3) sound waves
  • (4) microwaves

26. Which type of oscillation would most likely produce an electromagnetic wave?

  • (1) a vibrating tuning fork
  • (2) a washing machine agitator at work
  • (3) a swinging pendulum
  • (4) an electron traveling back and forth in a wire

27. If monochromatic light passes from water into air with an angle of incidence of 35°, which characteristic of the light will remain the same?

  • (1) frequency
  • (2) wavelength
  • (3) speed
  • (4) direction

28. The absolute index of refraction of medium Y is twice as great as the absolute index of refraction of medium X. As a light ray travels from medium X into medium Y, the speed of the light ray is

  • (1) halved
  • (2) doubled
  • (3) quartered
  • (4) quadrupled

29. The diagram below shows a transverse wave moving toward the right along a rope.

Physics 15 June 2017 Questions Answer Keys

At the instant shown, point P on the rope is moving toward the

  • (1) bottom of the page
  • (2) top of the page
  • (3) left
  • (4) right

30. When an isolated conductor is placed in the vicinity of a positive charge, the conductor is attracted to the charge. The charge of the conductor

  • (1) must be positive
  • (2) must be negative
  • (3) could be neutral or positive
  • (4) could be neutral or negative

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