Physical Setting 20 June 2014 Questions Answer Keys

**The University of the State of New York**

Regents High School Examination

Physical Setting

Physics

Friday, June 20, 2014 — 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. Which quantity is scalar?**

**(1) mass**- (2) force
- (3) momentum
- (4) acceleration

**2. What is the final speed of an object that starts from rest and accelerates uniformly at 4.0 meters per second2 over a distance of 8.0 meters?**

**(1) 8.0 m/s**- (2) 16 m/s
- (3) 32 m/s
- (4) 64 m/s

**3. The components of a 15-meters-per-second velocity at an angle of 60.° above the horizontal**

- (1) 7.5 m/s vertical and 13 m/s horizontal
**(2) 13 m/s vertical and 7.5 m/s horizontal**- (3) 6.0 m/s vertical and 9.0 m/s horizontal
- (4) 9.0 m/s vertical and 6.0 m/s horizontal

**4. What is the time required for an object starting from rest to fall freely 500. meters near Earth’s surface?**

- (1) 51.0 s
- (2) 25.5 s
**(3) 10.1 s**- (4) 7.14 s

**5. A baseball bat exerts a force of magnitude F on a ball. If the mass of the bat is three times the mass of the ball, the magnitude of the force of the ball on the bat is**

**(1) F**- (2) 2F
- (3) 3F
- (4) F/3

**6. A 2.0-kilogram mass is located 3.0 meters above the surface of Earth. What is the magnitude of Earth’s gravitational field strength at this location?**

- (1) 4.9 N/kg
- (2) 2.0 N/kg
**(3) 9.8 N/kg**- (4) 20. N/kg

**7. A truck, initially traveling at a speed of 22 meters per second, increases speed at a constant rate of 2.4 meters per second ^{2} for 3.2 seconds. What is the total distance traveled by the truck during this 3.2-second time interval?**

- (1) 12 m
- (2) 58 m
- (3) 70. m
**(4) 83 m**

**8. A 750-newton person stands in an elevator that is accelerating downward. The upward force of the elevator floor on the person must be**

- (1) equal to 0 N
**(2) less than 750 N**- (3) equal to 750 N
- (4) greater than 750 N

**9. A 3.0-kilogram object is acted upon by an impulse having a magnitude of 15 newton•seconds. What is the magnitude of the object’s change in momentum due to this impulse?**

- (1) 5.0 kg•m/s
**(2) 15 kg•m/s**- (3) 3.0 kg•m/s
- (4) 45 kg•m/s

**10. An air bag is used to safely decrease the momentum of a driver in a car accident. The air bag reduces the magnitude of the force acting on the driver by**

**(1) increasing the length of time the force acts on the driver**- (2) decreasing the distance over which the force acts on the driver
- (3) increasing the rate of acceleration of the driver
- (4) decreasing the mass of the driver

**11. An electron moving at constant speed produces**

- (1) a magnetic field, only
- (2) an electric field, only
**(3) both a magnetic and an electric field**- (4) neither a magnetic nor an electric field

**12. A beam of electrons passes through an electric field where the magnitude of the electric field strength is 3.00 × 10 ^{3} newtons per coulomb. What is the magnitude of the electrostatic force exerted by the electric field on each electron in the beam?**

- (1) 5.33 × 10−
^{23}N **(2) 4.80 × 10−**^{16}N- (3) 3.00 × 10
^{3}N - (4) 1.88 × 10
^{22 }N

**13. How much work is required to move 3.0 coulombs of electric charge a distance of 0.010 meter through a potential difference of 9.0 volts?**

- (1) 2.7 × 10
^{3}J **(2) 27 J**- (3) 3.0 J
- (4) 3.0 × 10−
^{2}J

**14. What is the resistance of a 20.0-meter-long tungsten rod with a cross-sectional area of 1.00 × 10− ^{4} meter^{2} at 20°C?**

- (1) 2.80 × 10−
^{5}Ω **(2) 1.12 × 10−**^{2}Ω- (3) 89.3 Ω
- (4) 112 Ω

**15. Two pieces of flint rock produce a visible spark when they are struck together. During this process, mechanical energy is converted into**

- (1) nuclear energy and electromagnetic energy
- (2) internal energy and nuclear energy
**(3) electromagnetic energy and internal energy**- (4) elastic potential energy and nuclear energy

**16. A 15-kilogram cart is at rest on a horizontal surface. A 5-kilogram box is placed in the cart. Compared to the mass and inertia of the cart, the cart-box system has**

**(1) more mass and more inertia**- (2) more mass and the same inertia
- (3) the same mass and more inertia
- (4) less mass and more inertia

**17. Transverse waves are to radio waves as longitudinal waves are to**

- (1) light waves
- (2) microwaves
- (3) ultraviolet waves
**(4) sound waves**

**18. As a monochromatic light ray passes from air into water, two characteristics of the ray that will not change are**

- (1) wavelength and period
**(2) frequency and period**- (3) wavelength and speed
- (4) frequency and speed

**19. When a mass is placed on a spring with a spring constant of 60.0 newtons per meter, the spring is compressed 0.500 meter. How much energy is stored in the spring?**

- (1) 60.0 J
- (2) 30.0 J
- (3) 15.0 J
**(4) 7.50 J**

**20. A boy pushes his sister on a swing. What is the frequency of oscillation of his sister on the swing if the boy counts 90. complete swings in 300. seconds?**

**(1) 0.30 Hz**- (2) 2.0 Hz
- (3) 1.5 Hz
- (4) 18 Hz

**21. What is the period of a sound wave having a frequency of 340. hertz?**

- (1) 3.40 × 10
^{2}s - (2) 1.02 × 10
^{0}s - (3) 9.73 × 10−
^{1}s - (4) 2.94 × 10−
^{3}s

**22. An MP3 player draws a current of 0.120 ampere from a 3.00-volt battery. What is the total charge that passes through the player in 900. seconds?**

- (1) 324 C
**(2) 108 C**- (3) 5.40 C
- (4) 1.80 C

**23. A beam of light has a wavelength of 4.5 × 10− ^{7} meter in a vacuum. The frequency of this light is**

- (1) 1.5 × 10−
^{15}Hz - (2) 4.5 × 10−
^{7}Hz - (3) 1.4 × 10
^{2}Hz **(4) 6.7 × 10**^{14}Hz

**24. When x-ray radiation and infrared radiation are traveling in a vacuum, they have the same**

**(1) speed**- (2) frequency
- (3) wavelength
- (4) energy per photon

**25. The diagram below represents two identical pulses approaching each other in a uniform medium.**

As the pulses meet and are superposed, the maximum displacement of the medium is

- (1) −6 cm
- (2) 0 cm
- (3) 3 cm
**(4) 6 cm**

**26. As a car approaches a pedestrian crossing the road, the driver blows the horn. Compared to the sound wave emitted by the horn, the sound wave detected by the pedestrian has a**

- (1) higher frequency and a lower pitch
**(2) higher frequency and a higher pitch**- (3) lower frequency and a higher pitch
- (4) lower frequency and a lower pitch

**27. When air is blown across the top of an open water bottle, air molecules in the bottle vibrate at a particular frequency and sound is produced. This phenomenon is called**

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

**28. An antibaryon composed of two antiup quarks and one antidown quark would have a charge of**

- (1) +1e
**(2) −1e**- (3) 0e
- (4) −3e

**29. Which force is responsible for producing a stable nucleus by opposing the electrostatic force of repulsion between protons?**

**(1) strong**- (2) weak
- (3) frictional
- (4) gravitational

**30. What is the total energy released when 9.11 × 10− ^{31} kilogram of mass is converted into energy?**

- (1) 2.73 × 10−
^{22}J **(2) 8.20 × 10−**^{14}J- (3) 9.11 × 10−
^{31}J - (4) 1.01 × 10−
^{47}J

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