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New York Regents Physics June 2010

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PS/PHYSICS The University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PHYSICAL SETTING PHYSICS Tuesday, June 22, 2010 9:15 a.m. to 12:15 p.m., only The answers to all questions in this examination are to be written in your separate answer booklet. Be sure to fill in the heading on the front of your answer booklet. You are to answer all questions in all parts of this examination according to the directions provided in the examination booklet. All work should be written in pen, except for graphs and drawings, which should be done in pencil. You may use scrap paper to work out the answers to the questions, but be sure to record all your answers in the answer booklet. When you have completed the examination, you must sign the statement printed on the first page of your answer booklet, indicating that you had no unlawful knowledge of the questions or answers prior to the examination and that you have neither given nor received assistance in answering any of the questions during the examination. Your answer booklet cannot be accepted if you fail to sign this declaration. Notice. . . A scientific or graphing calculator, a centimeter ruler, a protractor, and a copy of the 2006 Edition Reference Tables for Physical Setting/Physics, which you may need to answer some questions in this examination, must be available for your use while taking this examination. The use of any communications device is strictly prohibited when taking this examination. If you use any communications device, no matter how briefly, your examination will be invalidated and no score will be calculated for you. DO NOT OPEN THIS EXAMINATION BOOKLET UNTIL THE SIGNAL IS GIVEN. PS/PHYSICS Part A Answer all questions in this part. Directions (1 35): For each statement or question, write in your answer booklet the number of the word or expression that, of those given, best completes the statement or answers the question. 1 A baseball player runs 27.4 meters from the batter s box to first base, overruns first base by 3.0 meters, and then returns to first base. Compared to the total distance traveled by the player, the magnitude of the player s total displacement from the batter s box is (1) 3.0 m shorter (3) 3.0 m longer (2) 6.0 m shorter (4) 6.0 m longer 6 As shown in the diagram below, a student standing on the roof of a 50.0-meter-high building kicks a stone at a horizontal speed of 4.00 meters per second. v = 4.00 m/s 2 A motorboat, which has a speed of 5.0 meters per second in still water, is headed east as it crosses a river flowing south at 3.3 meters per second. What is the magnitude of the boat s resultant velocity with respect to the starting point? (1) 3.3 m/s (3) 6.0 m/s (2) 5.0 m/s (4) 8.3 m/s 50.0 m 3 A car traveling on a straight road at 15.0 meters per second accelerates uniformly to a speed of 21.0 meters per second in 12.0 seconds. The total distance traveled by the car in this 12.0-second time interval is (1) 36.0 m (3) 216 m (2) 180. m (4) 252 m Level ground (Not drawn to scale) How much time is required for the stone to reach the level ground below? [Neglect friction.] (1) 3.19 s (3) 10.2 s (2) 5.10 s (4) 12.5 s 4 A 0.149-kilogram baseball, initially moving at 15 meters per second, is brought to rest in 0.040 second by a baseball glove on a catcher s hand. The magnitude of the average force exerted on the ball by the glove is (1) 2.2 N (3) 17 N (2) 2.9 N (4) 56 N 7 On the surface of Earth, a spacecraft has a mass of 2.00 104 kilograms. What is the mass of the spacecraft at a distance of one Earth radius above Earth s surface? (1) 5.00 103 kg (3) 4.90 104 kg 4 kg (2) 2.00 10 (4) 1.96 105 kg 5 Which body is in equilibrium? (1) a satellite moving around Earth in a circular orbit (2) a cart rolling down a frictionless incline (3) an apple falling freely toward the surface of Earth (4) a block sliding at constant velocity across a tabletop PS/Physics June 10 8 A student pulls a 60.-newton sled with a force having a magnitude of 20. newtons. What is the magnitude of the force that the sled exerts on the student? (1) 20. N (3) 60. N (2) 40. N (4) 80. N [2] 9 The data table below lists the mass and speed of four different objects. 12 The diagram below represents a mass, m, being swung clockwise at constant speed in a horizontal circle. Data Table Object Mass (kg) Speed (m/s) A 4.0 6.0 B 6.0 5.0 C 8.0 3.0 D 16.0 1.5 C B m Which object has the greatest inertia? (1) A (3) C (2) B (4) D 10 The diagram below shows a 12-newton force being applied to A and B, initially at rest on a frictionless surface. Block A has 1.0 kilogram and block B has 2.0 kilograms. F = 12 N A 1.0 kg D A horizontal two blocks, horizontal, a mass of a mass of At the instant shown, the centripetal force acting on mass m is directed toward point (1) A (3) C (2) B (4) D 13 A 3.1-kilogram gun initially at rest is free to move. When a 0.015-kilogram bullet leaves the gun with a speed of 500. meters per second, what is the speed of the gun? (1) 0.0 m/s (3) 7.5 m/s (2) 2.4 m/s (4) 500. m/s B 2.0 kg Frictionless surface The magnitude of the acceleration of block B is (1) 6.0 m/s2 (3) 3.0 m/s2 2 (2) 2.0 m/s (4) 4.0 m/s2 11 A ball is thrown vertically upward with an initial velocity of 29.4 meters per second. What is the maximum height reached by the ball? [Neglect friction.] (1) 14.7 m (3) 44.1 m (2) 29.4 m (4) 88.1 m PS/Physics June 10 [3] [OVER] 14 Four projectiles, A, B, C, and D, were launched from, and returned to, level ground. The data table below shows the initial horizontal speed, initial vertical speed, and time of flight for each projectile. Data Table Projectile Initial Horizontal Speed (m/s) Initial Vertical Speed (m/s) Time of Flight (s) A 40.0 29.4 6.00 B 60.0 19.6 4.00 C 50.0 24.5 5.00 D 80.0 19.6 4.00 Which projectile traveled the greatest horizontal distance? [Neglect friction.] (1) A (3) C (2) B (4) D 15 A wound spring provides the energy to propel a toy car across a level floor. At time ti ,the car is moving at speed vi across the floor and the spring is unwinding, as shown below. At time tf , the spring has fully unwound and the car has coasted to a stop. vi vf = 0 At time ti At time tf Which statement best describes the transformation of energy that occurs between times ti and tf ? (1) Gravitational potential energy at ti is converted to internal energy at tf . (2) Elastic potential energy at ti is converted to kinetic energy at tf . (3) Both elastic potential energy and kinetic energy at ti are converted to internal energy at tf . (4) Both kinetic energy and internal energy at ti are converted to elastic potential energy at tf . 16 A 75-kilogram bicyclist coasts down a hill at a constant speed of 12 meters per second. What is the kinetic energy of the bicyclist? (3) 5.4 103 J (1) 4.5 102 J 2J (2) 9.0 10 (4) 1.1 104 J PS/Physics June 10 [4] 17 The diagram below represents a 155-newton box on a ramp. Applied force F causes the box to slide from point A to point B. 22 The diagram below represents the electric field surrounding two charged spheres, A and B. B m 5.60 F -N 155 x o b A 1.80 m B A 5.30 m What is the sign of the charge of each sphere? (1) Sphere A is positive and sphere B is negative. (2) Sphere A is negative and sphere B is positive. (3) Both spheres are positive. (4) Both spheres are negative. What is the total amount of gravitational potential energy gained by the box? (1) 28.4 J (3) 868 J (2) 279 J (4) 2740 J 18 An electric heater operating at 120. volts draws 8.00 amperes of current through its 15.0 ohms of resistance. The total amount of heat energy produced by the heater in 60.0 seconds is (1) 7.20 103 J (3) 8.64 104 J 4J (2) 5.76 10 (4) 6.91 106 J 23 Which circuit has the smallest equivalent resistance? 2 19 Magnetic fields are produced by particles that are (1) moving and charged (2) moving and neutral (3) stationary and charged (4) stationary and neutral 2 2 2 2 (1) 20 A charge of 30. coulombs passes through a 24-ohm resistor in 6.0 seconds. What is the current through the resistor? (1) 1.3 A (3) 7.5 A (2) 5.0 A (4) 4.0 A 2 (3) 2 2 21 What is the magnitude of the electrostatic force between two electrons separated by a distance of 1.00 10 8 meter? (3) 2.30 10 12 N (1) 2.56 10 22 N 20 N (2) 2.30 10 (4) 1.44 10 1 N PS/Physics June 10 2 2 2 (2) [5] 2 (4) [OVER] Base your answers to questions 24 through 26 on the information and diagram below. A longitudinal wave moves to the right through a uniform medium, as shown below. Points A, B, C, D, and E represent the positions of particles of the medium. Wave movement A C B D E 24 Which diagram best represents the motion of the particle at position C as the wave moves to the right? C (1) C (2) C C (4) (3) 25 The wavelength of this wave is equal to the distance between points (1) A and B (3) B and C (2) A and C (4) B and E 26 The energy of this wave is related to its (1) amplitude (2) period (3) speed (4) wavelength 27 A ray of monochromatic yellow light ( f = 5.09 1014 Hz) passes from water through flint glass and into medium X, as shown below. Normal Water Flint glass Medium X The absolute index of refraction of medium X is (1) less than 1.33 (3) greater than 1.52 and less than 1.66 (2) greater than 1.33 and less than 1.52 (4) equal to 1.66 PS/Physics June 10 [6] 33 What total mass must be converted into energy to produce a gamma photon with an energy of 1.03 10 13 joule? (3) 3.09 10 5 (1) 1.14 10 30 22 (2) 3.43 10 (4) 8.75 1029 28 A light ray traveling in air enters a second medium and its speed slows to 1.71 108 meters per second. What is the absolute index of refraction of the second medium? (1) 1.00 (3) 1.75 (2) 0.570 (4) 1.94 34 Compared to the mass and charge of a proton, an antiproton has (1) the same mass and the same charge (2) greater mass and the same charge (3) the same mass and the opposite charge (4) greater mass and the opposite charge 29 Playing a certain musical note on a trumpet causes the spring on the bottom of a nearby snare drum to vibrate. This phenomenon is an example of (1) resonance (3) reflection (2) refraction (4) diffraction Note that question 35 has only three choices. 30 In a vacuum, all electromagnetic waves have the same (1) speed (3) frequency (2) phase (4) wavelength 35 As viewed from Earth, the light from a star has lower frequencies than the light emitted by the star because the star is (1) moving toward Earth (2) moving away from Earth (3) stationary 31 A particle that is composed of two up quarks and one down quark is a (1) meson (3) proton (2) neutron (4) positron 32 A helium atom consists of two protons, two electrons, and two neutrons. In the helium atom, the strong force is a fundamental interaction between the (1) electrons, only (2) electrons and protons (3) neutrons and electrons (4) neutrons and protons PS/Physics June 10 [7] [OVER] Part B 1 Answer all questions in this part. Directions (36 50): For each statement or question, write in your answer booklet the number of the word or expression that, of those given, best completes the statement or answers the question. 36 The total work done in lifting a typical high school physics textbook a vertical distance of 0.10 meter is approximately (1) 0.15 J (3) 15 J (2) 1.5 J (4) 150 J 40 A child, starting from rest at the top of a playground slide, reaches a speed of 7.0 meters per second at the bottom of the slide. What is the vertical height of the slide? [Neglect friction.] (1) 0.71 m (3) 2.5 m (2) 1.4 m (4) 3.5 m 37 Which electrical unit is equivalent to one joule? (1) volt per meter (3) volt per coulomb (2) ampere volt (4) coulomb volt 41 The graph below represents the relationship between the current in a metallic conductor and the potential difference across the conductor at constant temperature. 38 A small electric motor is used to lift a 0.50-kilogram mass at constant speed. If the mass is lifted a vertical distance of 1.5 meters in 5.0 seconds, the average power developed by the motor is (1) 0.15 W (3) 3.8 W (2) 1.5 W (4) 7.5 W Current vs. Potential Difference 2.0 Current (A) 1.5 0 Time (2) PS/Physics June 10 1.0 2.0 3.0 4.0 Potential Difference (V) Time (3) The resistance of the conductor is (1) 1.0 (3) 0.50 (2) 2.0 (4) 4.0 Total Energy Total Energy Time (1) 1.0 0.5 Total Energy Total Energy 39 A ball is dropped from the top of a cliff. Which graph best represents the relationship between the ball s total energy and elapsed time as the ball falls to the ground? [Neglect friction.] Time (4) [8] 5.0 + 0- Velocity Velocity 42 A student throws a baseball vertically upward and then catches it. If vertically upward is considered to be the positive direction, which graph best represents the relationship between velocity and time for the baseball? [Neglect friction.] Time + 0 (1) (3) + 0- Velocity Velocity Time Time + 0- Time (2) (4) 43 A 5.0-kilogram sphere, starting from rest, falls freely 22 meters in 3.0 seconds near the surface of a planet. Compared to the acceleration due to gravity near Earth s surface, the acceleration due to gravity near the surface of the planet is approximately (1) the same (3) one-half as great (2) twice as great (4) four times as great 44 A 15.0-kilogram mass is moving at 7.50 meters per second on a horizontal, frictionless surface. What is the total work that must be done on the mass to increase its speed to 11.5 meters per second? (1) 120. J (3) 570. J (2) 422 J (4) 992 J 45 The circuit diagram below represents four resistors connected to a 12-volt source. R1 = 4.0 R2 = 6.0 12 V R3 = 8.0 R4 = 6.0 What is the total current in the circuit? (1) 0.50 A (2) 2.0 A PS/Physics June 10 (3) 8.6 A (4) 24 A [9] [OVER] Potential Difference (1) Power Power Power Power 46 Which graph best represents the relationship between the power expended by a resistor that obeys Ohm s Law and the potential difference applied to the resistor? Potential Difference (2) Potential Difference (3) Potential Difference (4) 47 The distance between an electron and a proton is varied. Which pair of graphs best represents the relationship between gravitational force, Fg, and distance, r, and the relationship between electrostatic force, Fe, and distance, r, for these particles? r r Fe Fg Fe Fg (1) (3) Fe Fg Fe Fg r r r r r r (4) (2) 48 The diagram below represents a periodic wave traveling through a uniform medium. 6.0 m If the frequency of the wave is 2.0 hertz, the speed of the wave is (1) 6.0 m/s (3) 8.0 m/s (2) 2.0 m/s (4) 4.0 m/s PS/Physics June 10 [10] 49 The diagram below represents a light ray reflecting from a plane mirror. Light ray Plane mirror The angle of reflection for the light ray is (1) 25 (2) 35 (3) 50. (4) 65 50 The diagram below shows a standing wave in a string clamped at each end. What is the total number of nodes and antinodes in the standing wave? (1) 3 nodes and 2 antinodes (3) 5 nodes and 4 antinodes (2) 2 nodes and 3 antinodes (4) 4 nodes and 5 antinodes PS/Physics June 10 [11] [OVER] Part B 2 Answer all questions in this part. Directions (51 60): Record your answers in the spaces provided in your answer booklet. Base your answers to questions 51 through 53 on the information and graph below. A machine fired several projectiles at the same angle, , above the horizontal. Each projectile was fired with a different initial velocity, vi. The graph below represents the relationship between the magnitude of the initial vertical velocity, viy, and the magnitude of the corresponding initial velocity, vi, of these projectiles. Initial Vertical Velocity (m/s) Initial Vertical Velocity vs. Initial Velocity 40. 30. 20. 10. 0.0 10. 20. 30. 40. 50. 60. Initial Velocity (m/s) 51 Determine the magnitude of the initial vertical velocity of the projectile, viy, when the magnitude of its initial velocity, vi, was 40. meters per second. [1] 52 Determine the angle, , above the horizontal at which the projectiles were fired. [1] 53 Calculate the magnitude of the initial horizontal velocity of the projectile, vix, when the magnitude of its initial velocity, vi, was 40. meters per second. [Show all work, including the equation and substitution with units.] [2] 54 A student makes a simple pendulum by attaching a mass to the free end of a 1.50-meter length of string suspended from the ceiling of her physics classroom. She pulls the mass up to her chin and releases it from rest, allowing the pendulum to swing in its curved path. Her classmates are surprised that the mass doesn t reach her chin on the return swing, even though she does not move. Explain why the mass does not have enough energy to return to its starting position and hit the girl on the chin. [1] PS/Physics June 10 [12] 55 A 6-ohm resistor and a 4-ohm resistor are connected in series with a 6-volt battery in an operating electric circuit. A voltmeter is connected to measure the potential difference across the 6-ohm resistor. In the space in your answer booklet, draw a diagram of this circuit including the battery, resistors, and voltmeter using symbols from the Reference Tables for Physical Setting/Physics. Label each resistor with its value. [Assume the availability of any number of wires of negligible resistance.] [2] Base your answers to questions 59 and 60 on the information below. In an experiment, a 0.028-kilogram rubber stopper is attached to one end of a string. A student whirls the stopper overhead in a horizontal circle with a radius of 1.0 meter. The stopper completes 10. revolutions in 10. seconds. Stopper 10 2 56 When a spring is compressed 2.50 meter from its equilibrium position, the total potential energy stored in the spring is 1.25 10 2 joule. Calculate the spring constant of the spring. [Show all work, including the equation and substitution with units.] [2] 1.0 m Base your answers to questions 57 and 58 on the information below. (Not drawn to scale) 59 Determine the speed of the whirling stopper. [1] A 3.50-meter length of wire with a crosssectional area of 3.14 10 6 meter2 is at 20 Celsius. The current in the wire is 24.0 amperes when connected to a 1.50-volt source of potential difference. 60 Calculate the magnitude of the centripetal force on the whirling stopper. [Show all work, including the equation and substitution with units.] [2] 57 Determine the resistance of the wire. [1] 58 Calculate the resistivity of the wire. [Show all work, including the equation and substitution with units.] [2] PS/Physics June 10 [13] [OVER] Part C Answer all questions in this part. Directions (61 75): Record your answers in the spaces provided in your answer booklet. Base your answers to questions 61 through 64 on the information below. Base your answers to questions 65 through 68 on the information below. In a laboratory investigation, a student applied various downward forces to a vertical spring. The applied forces and the corresponding elongations of the spring from its equilibrium position are recorded in the data table below. An ice skater applies a horizontal force to a 20.-kilogram block on frictionless, level ice, causing the block to accelerate uniformly at 1.4 meters per second2 to the right. After the skater stops pushing the block, it slides onto a region of ice that is covered with a thin layer of sand. The coefficient of kinetic friction between the block and the sand-covered ice is 0.28. Data Table Force (N) Elongation (m) 0 0 0.5 0.010 1.0 0.018 1.5 0.027 2.0 0.035 2.5 0.046 65 Calculate the magnitude of the force applied to the block by the skater. [Show all work, including the equation and substitution with units.] [2] 66 On the diagram in your answer booklet, starting at point A, draw a vector to represent the force applied to the block by the skater. Begin the vector at point A and use a scale of 1.0 centimeter = 5.0 newtons. [1] Directions (61 63): Construct a graph on the grid in your answer booklet, following the directions below. 67 Determine the magnitude of the normal force acting on the block. [1] 61 Mark an appropriate scale on the axis labeled Force (N). [1] 68 Calculate the magnitude of the force of friction acting on the block as it slides over the sand-covered ice. [Show all work, including the equation and substitution with units.] [2] 62 Plot the data points for force versus elongation. [1] 63 Draw the best-fit line or curve. [1] 64 Using your graph, calculate the spring constant of this spring. [Show all work, including the equation and substitution with units.] [2] PS/Physics June 10 [14] Base your answers to questions 69 through 71 on the information and diagram below. Base your answers to questions 72 through 75 on the information below. A monochromatic light ray ( f = 5.09 1014 Hz) traveling in air is incident on the surface of a rectangular block of Lucite. As a mercury atom absorbs a photon of energy, an electron in the atom changes from energy level d to energy level e. Normal 72 Determine the energy of the absorbed photon in electronvolts. [1] Light ray 73 Express the energy of the absorbed photon in joules. [1] Air Lucite 74 Calculate the frequency of the absorbed photon. [Show all work, including the equation and substitution with units.] [2] 75 Based on your calculated value of the frequency of the absorbed photon, determine its classification in the electromagnetic spectrum. [1] Air 69 Measure the angle of incidence for the light ray to the nearest degree. [1] 70 Calculate the angle of refraction of the light ray when it enters the Lucite block. [Show all work, including the equation and substitution with units.] [2] 71 What is the angle of refraction of the light ray as it emerges from the Lucite block back into air? [1] PS/Physics June 10 [15] PS/PHYSICS Printed on Recycled Paper PS/PHYSICS FOR TEACHERS ONLY The University of the State of New York REGENTS HIGH SCHOOL EXAMINATION PS P PHYSICAL SETTING/PHYSICS Tuesday, June 22, 2010 9:15 a.m. to 12:15 p.m., only SCORING KEY AND RATING GUIDE Directions to the Teacher: Refer to the directions on page 2 before rating student papers. Updated information regarding the rating of this examination may be posted on the New York State Education Department s web site during the rating period. Check this web site http://www.emsc.nysed.gov/osa/ and select the link Examination Scoring Information for any recently posted information regarding this examination. This site should be checked before the rating process for this examination begins and several times throughout the Regents examination period. Part A and Part B 1 Allow 1 credit for each correct response. Part A Part B 1 1 . . . . . 2. . . . . 13 . . . . .2. . . . . 25 . . . . .2. . . . . 3 6 . . . . . 2. . . . . 44 . . . . .3 . . . . 2 . . . . .3 . . . . 1 4 . . . . . 4. . . . . 26 . . . . .1. . . . . 3 7 . . . . . 4. . . . . 45 . . . . .1 . . . . 3 . . . . . 3. . . . . 15 . . . . .3. . . . . 27 . . . . .4. . . . . 3 8 . . . . . 2. . . . . 46 . . . . .4 . . . . 4 . . . . . 4. . . . . 16 . . . . .3. . . . . 28 . . . . .3. . . . . 39 . . . . .4. . . . . 47 . . . . .1 . . . . 5 . . . . . 4. . . . . 17 . . . . .2. . . . . 29 . . . . .1. . . . . 4 0 . . . . . 3. . . . . 48 . . . . .3 . . . . 6 . . . . . 1. . . . . 18 . . . . .2. . . . . 30 . . . . .1. . . . . 41 . . . . . 2 . . . . 49 . . . . . 1 . . . . 7 . . . . .2 . . . . 1 9 . . . . . 1. . . . . 31 . . . . .3. . . . . 42 . . . . . 4 . . . . 50 . . . . .3 . . . . 8 . . . . .1 . . . . 2 0 . . . . . 2. . . . . 32 . . . . .4. . . . . 43 . . . . . 3 . . . . 9 . . . . .4 . . . . 2 1 . . . . . 3. . . . . 33 . . . . .1. . . . . 1 0 . . . . . 4. . . . . 22 . . . . .2. . . . . 34 . . . . .3. . . . . 1 1 . . . . . 3. . . . . 23 . . . . .3. . . . . 35 . . . . .2. . . . . 1 2 . . . . . 3. . . . . 24 . . . . .4. . . . . PHYSICAL SETTING/PHYSICS continued Directions to the Teacher Follow the procedures below for scoring student answer papers for the Physical Setting/Physics examination. Additional information about scoring is provided in the publication Information for Scoring Regents Examinations in the Sciences. Use only red ink or red pencil in rating Regents papers. Do not attempt to correct the student s work by making insertions or changes of any kind. For Part A and Part B 1, indicate by means of a check mark each incorrect or omitted answer. In the box provided at the end of each part, record the number of questions the student answered correctly for that part. Students responses must be scored strictly according to the Scoring Key and Rating Guide. For open-ended questions, credit may be allowed for responses other than those given in the rating guide if the response is a scientifically accurate answer to the question and demonstrates adequate knowledge as indicated by the examples in the rating guide. Fractional credit is not allowed. Only whole-number credit may be given to a response. Units need not be given when the wording of the questions allows such omissions. Raters should enter the scores earned for Part A, Part B 1, Part B 2, and Part C on the appropriate lines in the box printed on the answer booklet, and then should add these four scores and enter the total in the box labeled Total Written Test Score. Then, the student s raw score on the written test should be converted to a scale score by using the conversion chart that will be posted on the Department s web site: http://www.emsc.nysed.gov/osa/ on Tuesday, June 22, 2010. The student s scale score should be entered in the labeled box on the student s answer booklet. The scale score is the student s final examination score. On the front of the student s answer booklet, raters must enter their initials on the lines next to Rater 1 or Rater 2. All student answer papers that receive a scaled score of 60 through 64 must be scored a second time. For the second scoring, a different committee of teachers may score the student s paper or the original committee may score the paper, except that no teacher may score the same open-ended questions that he/she scored in the first rating of the paper. The school principal is responsible for assuring that the student s final examination score is based on a fair, accurate, and reliable scoring of the student s answer paper. Because scale scores corresponding to raw scores in the conversion chart may change from one examination to another, it is crucial that for each administration, the conversion chart provided for that administration be used to determine the student s final score. [2] PHYSICAL SETTING/PHYSICS continued Teachers should become familiar with the Department publication Regents Examination in Physical Setting/Physics: Rating Guide for Parts B 2 and C. This publication can be found on the New York State Education Department web site http://www.emsc.nysed.gov/osa/scire/scirearch/phyratg02.pdf. This guide provides a set of directions, along with some examples, to assist teachers in rating parts B 2 and C of the Regents Examination in Physical Setting/Physics. For each question requiring the student to determine the answer, apply the following scoring criteria: Allow credit if the answer is not expressed with the correct number of significant figures. Do not penalize a student for a rounding error or if the answer is truncated. For each question requiring the student to show all calculations, including the equation and substitution with units, apply the following scoring criteria: Scoring Criteria for Parts Calculations Allow 1 credit for the equation and substitution of values with units. If the equation and/or substitution with units is not shown, do not allow this credit. Allow credit if the student has listed the values with units and written a correct equation. Allow 1 credit for the correct answer (number and unit). If the number is given without the unit, allow credit if the credit for units was previously deducted for this calculation problem. Penalize a student only once per calculation problem for incorrect or omitted units. Allow credit if the answer is not expressed with the correct number of significant figures. Do not penalize a student for a rounding error or if the answer is truncated. Part B 2 51 [1] Allow 1 credit for 25 m/s 1 m/s. 52 [1] Allow 1 credit for 39 2 . Note: Allow credit for an answer that is consistent with the student s response to question 51. 53 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Examples of 2-credit responses: (40. m/s) cos 39 vix 31 m/s or viy 2 vi 2 vix vi cos vix vix 2 vi 2 viy 2 vix vix (40. m/s) 2 vix (25 m/s) 2 31 m/s Note: Allow credit for an answer that is consistent with the student s response to question 51 or 52. [3] [OVER] PHYSICAL SETTING/PHYSICS continued 54 [1] Allow 1 credit. Acceptable responses include, but are not limited to: friction Some of the gravitational energy of the mass was converted into internal energy. Therefore, it could not return to its original height. air resistance 55 [2] Allow a maximum of 2 credits, allocated as follows: Allow 1 credit for drawing a series circuit containing two resistors and a battery. Allow 1 credit for correct placement of the voltmeter. Example of a 2-credit response: V 6V 6 4 Note: Allow credit even if the student draws a cell instead of a battery and/or labels only one resistor with its value. 56 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Example of a 2-credit response: 1 PEs = kx2 2 2 PEs x2 2(1.25 10 2 J) k= (2.50 10 2 m)2 k= k = 40.0 N/m [4] PHYSICAL SETTING/PHYSICS continued 57 [1] Allow 1 credit for 6.25 10 2 . 58 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Example of a 2-credit response: R L A RA L (6.25 10 5.61 10 2 )(3.14 10 6 m 2 ) 3.50 m 8 m Note: Allow credit for an answer that is consistent with the student s response to question 57. 59 [1] Allow 1 credit for 6.3 m/s. 60 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Example of a 2-credit response: Fc Fc Fc Fc mac ac v2 r mv 2 r (0.028 kg)(6.3 m/s) 2 1.0 m 1.1 N Note: Allow credit for an answer that is consistent with the student s response to question 59. [5] [OVER] PHYSICAL SETTING/PHYSICS continued Part C 61 [1] Allow 1 credit for an appropriate linear scale. 62 [1] Allow 1 credit for plotting all points accurately 0.3 grid space. 63 [1] Allow 1 credit for drawing the best-fit line or curve consistent with the student s responses to questions 61 and 62. Example of a 3-credit graph for questions 61 63: Force vs. Elongation 2.5 Force (N) 2.0 1.5 1.0 0.5 0 0.010 0.020 0.030 0.040 0.050 Elongation (m) 64 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Examples of 2-credit responses: k k k F x 2.5 N 0.046 m 54 N/m y x 2.5 N slope 0.046 m slope 55 N/m slope or 0.8 N 0.015 m Note: Allow credit for an answer that is consistent with the student s graph. The slope may be determined by substitution of values from the data table only if the data points are on the best-fit line or if the student failed to draw a best-fit line. [6] PHYSICAL SETTING/PHYSICS continued 65 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Example of a 2-credit response: Fnet m Fnet = ma a= Fnet = (20. kg)(1.4 m/s 2 ) Fnet = 28 N 66 [1] Allow 1 credit for a vector 5.6 cm 0.2 cm long parallel to the surface of the ice and pointing to the right. Example of a 1-credit response: A Level ice Note: Allow credit for an answer that is consistent with the student s response to question 65. The vector need not start at point A to receive this credit. 67 [1] Allow 1 credit for 2.0 2 10 N or 196 N. 68 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Example of a 2-credit response: F f = FN F f = (0.28) (2.0 102 N) F f = 56 N Note: Allow credit for an answer that is consistent with the student s response to question 67. [7] [OVER] PHYSICAL SETTING/PHYSICS concluded 69 [1] Allow 1 credit for 50. 2 . 70 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Example of a 2-credit response: n1 sin sin sin 2 n2 sin 1 2 2 n1 sin n2 2 1 1.00 (sin 50.c ) 1.50 31 Note: Allow credit for an answer that is consistent with the student s response to question 69. 71 [1] Allow 1 credit for 50. . Note: Allow credit for an answer that is consistent with the student s response to question 69 or 70. 72 [1] Allow 1 credit for 1.24 eV. 73 [1] Allow 1 credit for 1.98 question 72. 10 19 J or an answer that is consistent with the student s response to 74 [2] Allow a maximum of 2 credits. Refer to Scoring Criteria for Calculations in this rating guide. Example of a 2-credit response: E photon = hf f= E photon h 1.98 10 19 J f= 6.63 10 34 J s f 2.99 1014 Hz Note: Allow credit for an answer that is consistent with the student s response to question 73. 75 [1] Allow 1 credit for infrared or an answer that is consistent with the student s response to question 74. [8] Regents Examination in Physical Setting/Physics June 2010 Chart for Converting Total Test Raw Scores to Final Examination Scores (Scale Scores) The Chart for Determining the Final Examination Score for the June 2010 Regents Examination in Physical Setting/Physics will be posted on the Department s web site http://www.emsc.nysed.gov/osa/ on Tuesday, June 22, 2010. Conversion charts provided for previous administrations of the Regents Examination in Physical Setting/Physics must NOT be used to determine students final scores for this administration. Online Submission of Teacher Evaluations of the Test to the Department Suggestions and feedback from teachers provide an important contribution to the test development process. The Department provides an online evaluation form for State assessments. It contains spaces for teachers to respond to several specific questions and to make suggestions. Instructions for completing the evaluation form are as follows: 1. Go to www.emsc.nysed.gov/osa/exameval. 2. Select the test title. 3. Complete the required demographic fields. 4. Complete each evaluation question and provide comments in the space provided. 5. Click the SUBMIT button at the bottom of the page to submit the completed form. [9] Map to Core Curriculum June 2010 Physical Setting/Physics Question Numbers Part A 1 35 Standard 1 Key Ideas Part B 36 60 Math Key Idea 1 1, 2, 3, 4, 6, 8, 10, 11, 13, 14, 16, 17, 18, 20, 21, 23, 28, 33 37, 38, 40, 44, 45, 48, 49, 57, 58, 59, 60 Math Key Idea 2 9, 29 39, 46, 47, 51, 53 Math Key Idea 3 14 41, 43, 52 Part C 61 75 61, 62, 63, 65, 66, 67, 68, 73, 74 61, 64, 69, 70, 71 Sci. Inq. Key Idea 1 Sci. Inq. Key Idea 2 Sci. Inq. Key Idea 3 42 Eng. Des. Key Idea 1 Standard 2 Key Idea 1 Key Idea 2 Standard 6 Key Idea 1 Key Idea 2 34 Key Idea 3 36 Key Idea 4 Key Idea 5 Key Idea 6 Standard 7 Key Idea 1 Key Idea 2 Standard 4 Process Skills 4.1 15, 16, 24 54, 55, 58, 56 4.3 29 50, 48 70, 71 56, 42 66, 64 5.1 5.3 33 72, 75 Standard 4 4.1 15, 16, 17, 18, 19, 20, 23 36, 37, 38, 39, 40, 41, 44, 45, 46, 54, 55, 56, 57, 58 4.3 24, 25, 26, 27, 28, 29, 30, 35 48, 49, 50 69, 70, 71, 75 5.1 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 21, 22 42, 43, 47, 51, 52, 53, 59, 60 61, 62, 63, 64, 65, 66,67, 68 5.3 31, 32, 33, 34 72, 73, 74 [10] PS/Physics June 10 Rating Guide Printed on Recycled Paper

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