# The University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS. Friday, June 20, :15 to 4:15 p.m.

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2 Part A Answer all questions in this part. Directions (1 35): 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 (3) momentum (2) force (4) acceleration 2 What is the final speed of an object that starts from rest and accelerates uniformly at 4.0 meters per second 2 over a distance of 8.0 meters? (1) 8.0 m/s (3) 32 m/s (2) 16 m/s (4) 64 m/s 3 The components of a 15-meters-per-second velocity at an angle of 60. above the horizontal are (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 (3) 10.1 s (2) 25.5 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 (3) 3F (2) 2F (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 (3) 9.8 N/kg (2) 2.0 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 (3) 70. m (2) 58 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 (3) equal to 750 N (2) less than 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 (3) 3.0 kg m/s (2) 15 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 P.S./Physics June 14 [2]

3 12 A beam of electrons passes through an electric field where the magnitude of the electric field strength is newtons per coulomb. What is the magnitude of the electrostatic force exerted by the electric field on each electron in the beam? (1) N (3) N (2) N (4) N 13 How much work is required to move 3.0 coulombs of electric charge a distance of meter through a potential difference of 9.0 volts? (1) J (3) 3.0 J (2) 27 J (4) J 14 What is the resistance of a 20.0-meter-long tungsten rod with a cross-sectional area of meter 2 at 20 C? (1) Ω (3) 89.3 Ω (2) 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 (3) ultraviolet waves (2) microwaves (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 meter. How much energy is stored in the spring? (1) 60.0 J (3) 15.0 J (2) 30.0 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 (3) 1.5 Hz (2) 2.0 Hz (4) 18 Hz 21 What is the period of a sound wave having a frequency of 340. hertz? (1) s (3) s (2) s (4) s 22 An MP3 player draws a current of ampere from a 3.00-volt battery. What is the total charge that passes through the player in 900. seconds? (1) 324 C (3) 5.40 C (2) 108 C (4) 1.80 C 23 A beam of light has a wavelength of meter in a vacuum. The frequency of this light is (1) Hz (3) Hz (2) Hz (4) Hz 24 When x-ray radiation and infrared radiation are traveling in a vacuum, they have the same (1) speed (3) wavelength (2) frequency (4) energy per photon P.S./Physics June 14 [3] [OVER]

4 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 (3) 3 cm (2) 0 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 (3) resonance (2) refraction (4) the Doppler effect 28 An antibaryon composed of two antiup quarks and one antidown quark would have a charge of (1) +1e (3) 0e (2) 1e (4) 3e 29 Which force is responsible for producing a stable nucleus by opposing the electrostatic force of repulsion between protons? (1) strong (3) frictional (2) weak (4) gravitational 30 What is the total energy released when kilogram of mass is converted into energy? (1) J (3) J (2) J (4) J P.S./Physics June 14 [4]

5 31 A shopping cart slows as it moves along a level floor. Which statement describes the energies of the cart? (1) The kinetic energy increases and the gravitational potential energy remains the same. (2) The kinetic energy increases and the gravitational potential energy decreases. (3) The kinetic energy decreases and the gravitational potential energy remains the same. (4) The kinetic energy decreases and the gravitational potential energy increases. 32 Two identically-sized metal spheres, A and B, are on insulating stands, as shown in the diagram below. Sphere A possesses an excess of electrons and sphere B is neutral. Which diagram best represents the charge distribution on sphere B? 33 Two points, A and B, are located within the electric field produced by a 3.0 nanocoulomb charge. Point A is 0.10 meter to the left of the charge and point B is 0.20 meter to the right of the charge, as shown in the diagram below. Compared to the magnitude of the electric field strength at point A, the magnitude of the electric field strength at point B is (1) half as great (3) one-fourth as great (2) twice as great (4) four times as great P.S./Physics June 14 [5] [OVER]

6 34 The diagram below represents two waves, A and B, traveling through the same uniform medium. Which characteristic is the same for both waves? (1) amplitude (3) period (2) frequency (4) wavelength 35 The diagram below shows a periodic wave. Which two points on the wave are 180. out of phase? (1) A and C (3) F and G (2) B and E (4) D and H P.S./Physics June 14 [6]

7 Part B 1 Answer all questions in this part. Directions (36 50): 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. 36 The height of a 30-story building is approximately (1) 10 0 m (3) 10 2 m (2) 10 1 m (4) 10 3 m 37 Two identically-sized metal spheres on insulating stands are positioned as shown below. The charge on sphere A is coulomb and the charge on sphere B is coulomb. 40 The total amount of electrical energy used by a 315-watt television during 30.0 minutes of operation is (1) J (3) J (2) J (4) J 41 Which graph best represents the relationship between the absolute index of refraction and the speed of light ( f = Hz) in various media? The two spheres are touched together and then separated. The total number of excess electrons on sphere A after the separation is (1) (3) (2) (4) A kilogram car travels at a constant speed of 20. meters per second around a horizontal circular track. The diameter of the track is meters. The magnitude of the car s centripetal acceleration is (1) 0.20 m/s 2 (3) 8.0 m/s 2 (2) 2.0 m/s 2 (4) 4.0 m/s 2 39 Which combination of units can be used to express electrical energy? (1) volt coulomb (2) coulomb volt (3) volt coulomb (4) volt coulomb second 42 A 25-gram paper cup falls from rest off the edge of a tabletop 0.90 meter above the floor. If the cup has 0.20 joule of kinetic energy when it hits the floor, what is the total amount of energy converted into internal (thermal) energy during the cup s fall? (1) 0.02 J (3) 2.2 J (2) 0.22 J (4) 220 J 43 Which electron transition between the energy levels of hydrogen causes the emission of a photon of visible light? (1) n = 6 to n = 5 (3) n = 5 to n = 2 (2) n = 5 to n = 6 (4) n = 2 to n = 5 P.S./Physics June 14 [7] [OVER]

8 44 Which graph best represents an object in equilibrium moving in a straight line? 46 Which graph best represents the relationship between photon energy and photon wavelength? 45 A body, B, is moving at constant speed in a horizontal circular path around point P. Which diagram shows the direction of the velocity (v) and the direction of the centripetal force (F c ) acting on the body? 47 Which combination of initial horizontal velocity, (v H ) and initial vertical velocity, (v v ) results in the greatest horizontal range for a projectile over level ground? [Neglect friction.] P.S./Physics June 14 [8]

9 48 Which graph best represents the greatest amount of work? 49 When a ray of light traveling in water reaches a boundary with air, part of the light ray is reflected and part is refracted. Which ray diagram best represents the paths of the reflected and refracted light rays? 50 The graph below represents the work done against gravity by a student as she walks up a flight of stairs at constant speed. Compared to the power generated by the student after 2.0 seconds, the power generated by the student after 4.0 seconds is (1) the same (3) half as great (2) twice as great (4) four times as great P.S./Physics June 14 [9] [OVER]

11 62 Regardless of the method used to generate electrical energy, the amount of energy provided by the source is always greater than the amount of electrical energy produced. Explain why there is a difference between the amount of energy provided by the source and the amount of electrical energy produced. [1] Base your answers to questions 63 through 65 on the graph below, which represents the relationship between velocity and time for a car moving along a straight line, and your knowledge of physics. 63 Determine the magnitude of the average velocity of the car from t = 6.0 seconds to t = 10. seconds. [1] 64 Determine the magnitude of the car s acceleration during the first 6.0 seconds. [1] 65 Identify the physical quantity represented by the shaded area on the graph. [1] P.S./Physics June 14 [11] [OVER]

13 Base your answers to questions 76 through 80 on the information below and on your knowledge of physics. A horizontal 20.-newton force is applied to a 5.0-kilogram box to push it across a rough, horizontal floor at a constant velocity of 3.0 meters per second to the right. 76 Determine the magnitude of the force of friction acting on the box. [1] Calculate the weight of the box. [Show all work, including the equation and substitution with units.] [2] Calculate the coefficient of kinetic friction between the box and the floor. [Show all work, including the equation and substitution with units] [2] Base your answers to questions 81 through 85 on the information below and on your knowledge of physics. An electron traveling with a speed of meters per second collides with a photon having a frequency of hertz. After the collision, the photon has joule of energy Calculate the original kinetic energy of the electron. [Show all work, including the equation and substitution with units.] [2] 83 Determine the energy in joules of the photon before the collision. [1] 84 Determine the energy lost by the photon during the collision. [1] 85 Name two physical quantities conserved in the collision. [1] P.S./Physics June 14 [13]

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