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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.

Base your answers to questions 1 and 2 on the
information below.
In a drill during basketball practice, a
player runs the length of the 30.meter court
and back. The player does this three times in
60. seconds.
1 The magnitude of the player’s total displacement
after running the drill is
(1) 0.0 m (3) 60. m
(2) 30. m (4) 180 m Answer: 1
2 The average speed of the player during the drill is
(1) 0.0 m/s (3) 3.0 m/s
(2) 0.50 m/s (4) 30. m/s Answer: 3
3 A baseball is thrown at an angle of 40.0° above
the horizontal. The horizontal component of the
baseball’s initial velocity is 12.0 meters per
second. What is the magnitude of the ball’s initial
velocity?
(1) 7.71 m/s (3) 15.7 m/s
(2) 9.20 m/s (4) 18.7 m/s Answer: 3
4 A particle could have a charge of
(1) 0.8 × 10^{−19} C (3) 3.2 × 10^{−19} C
(2) 1.2 × 10^{−19} C (4) 4.1 × 10^{−19} C Answer: 3
5 Which object has the greatest inertia?
(1) a 15kg mass traveling at 5.0 m/s
(2) a 10.kg mass traveling at 10. m/s
(3) a 10.kg mass traveling at 5.0 m/s
(4) a 5.0kg mass traveling at 15 m/s Answer: 1
6 A car, initially traveling east with a speed of
5.0 meters per second, is accelerated uniformly
at 2.0 meters per second^{2} east for 10. seconds
along a straight line. During this 10.second
interval the car travels a total distance of
(1) 50. m (3) 1.0 × 10^{2} m
(2) 60. m (4) 1.5 × 10^{2} m Answer: 4
7 Which situation describes an object that has no
unbalanced force acting on it?
(1) an apple in free fall
(2) a satellite orbiting Earth
(3) a hockey puck moving at constant velocity
across ice
(4) a laboratory cart moving down a frictionless
30.° incline Answer: 3
8 A child riding a bicycle at 15 meters per second
accelerates at −3.0 meters per second^{2} for
4.0 seconds. What is the child’s speed at the end
of this 4.0second interval?
(1) 12 m/s (3) 3.0 m/s
(2) 27 m/s (4) 7.0 m/s Answer: 3
9 An unbalanced force of 40. newtons keeps a
5.0kilogram object traveling in a circle of radius
2.0 meters. What is the speed of the object?
(1) 8.0 m/s (3) 16 m/s
(2) 2.0 m/s (4) 4.0 m/s Answer: 4
10 A 5.00kilogram block slides along a horizontal,
frictionless surface at 10.0 meters per second for
4.00 seconds. The magnitude of the block’s
momentum is
(1) 200. kg•m/s (3) 20.0 kg•m/s
(2) 50.0 kg•m/s (4) 12.5 kg•m/s Answer: 2
11 A 0.50kilogram puck sliding on a horizontal
shuffleboard court is slowed to rest by a
frictional force of 1.2 newtons. What is the
coefficient of kinetic friction between the puck
and the surface of the shuffleboard court?
(1) 0.24 (3) 0.60
(2) 0.42 (4) 4.1 Answer: 1
12 A number of 1.0newton horizontal forces are
exerted on a block on a frictionless, horizontal
surface. Which topview diagram shows the
forces producing the greatest magnitude of
acceleration of the block?
Answer: 1
13 On a small planet, an astronaut uses a vertical
force of 175 newtons to lift an 87.5kilogram
boulder at constant velocity to a height of
0.350 meter above the planet’s surface. What is
the magnitude of the gravitational field strength
on the surface of the planet?
(1) 0.500 N/kg (3) 9.81 N/kg
(2) 2.00 N/kg (4) 61.3 N/kg Answer: 2
14 A car uses its brakes to stop on a level road.
During this process, there must be a conversion
of kinetic energy into
(1) light energy
(2) nuclear energy
(3) gravitational potential energy
(4) internal energy Answer: 4
15 Which change decreases the resistance of a piece
of copper wire?
(1) increasing the wire’s length
(2) increasing the wire’s resistivity
(3) decreasing the wire’s temperature
(4) decreasing the wire’s diameter Answer: 3
16 A stone on the end of a string is whirled
clockwise at constant speed in a horizontal circle
as shown in the diagram below.
Which pair of arrows best represents the
directions of the stone’s velocity, v, and
acceleration, a, at the position shown?
Answer: 4
17 How much work is done by the force lifting a
0.1kilogram hamburger vertically upward at
constant velocity 0.3 meter from a table?
(1) 0.03 J (3) 0.3 J
(2) 0.1 J (4) 0.4 J Answer: 3
18 Two electrons are separated by a distance of
3.00 × 10^{−6} meter. What are the magnitude and
direction of the electrostatic forces each exerts
on the other?
(1) 2.56 × 10^{−17} N away from each other
(2) 2.56 × 10^{−17} N toward each other
(3) 7.67 × 10^{−23} N away from each other
(4) 7.67 × 10^{−23} N toward each other Answer: 1
19 Which object will have the greatest change in
electrical energy?
(1) an electron moved through a potential
difference of 2.0 V
(2) a metal sphere with a charge of 1.0 × 10^{−9} C
moved through a potential difference of 2.0 V
(3) an electron moved through a potential
difference of 4.0 V
(4) a metal sphere with a charge of 1.0 × 10^{−9} C
moved through a potential difference of 4.0 V Answer: 4
20 The resistance of a circuit remains constant.
Which graph best represents the relationship
between the current in the circuit and the
potential difference provided by the battery?
Answer: 4
21 The wavelength of a wave doubles as it travels
from medium A into medium B. Compared to the
wave in medium A, the wave in medium B has
(1) half the speed
(2) twice the speed
(3) half the frequency
(4) twice the frequency Answer: 2
22 The watt•second is a unit of
(1) power
(2) energy
(3) potential difference
(4) electric field strength Answer: 2
23 Which quantity has both a magnitude and a
direction?
(1) energy (3) power
(2) impulse (4) work Answer: 2
24 A tuning fork vibrates at a frequency of 512 hertz
when struck with a rubber hammer. The sound
produced by the tuning fork will travel through
the air as a
(1) longitudinal wave with air molecules
vibrating parallel to the direction of travel
(2) transverse wave with air molecules vibrating
parallel to the direction of travel
(3) longitudinal wave with air molecules vibrating
perpendicular to the direction of travel
(4) transverse wave with air molecules vibrating
perpendicular to the direction of travel Answer: 1
25 A 3ohm resistor and a 6ohm resistor are
connected in parallel across a 9volt battery.
Which statement best compares the potential
difference across each resistor?
(1) The potential difference across the 6ohm
resistor is the same as the potential
difference across the 3ohm resistor.
(2) The potential difference across the 6ohm
resistor is twice as great as the potential
difference across the 3ohm resistor.
(3) The potential difference across the 6ohm
resistor is half as great as the potential
difference across the 3ohm resistor.
(4) The potential difference across the 6ohm
resistor is four times as great as the potential
difference across the 3ohm resistor. Answer: 1
26 A 3.6volt battery is used to operate a cell phone
for 5.0 minutes. If the cell phone dissipates
0.064 watt of power during its operation, the
current that passes through the phone is
(1) 0.018 A (3) 19 A
(2) 5.3 A (4) 56 A Answer: 1
27 A monochromatic beam of light has a frequency
of 7.69 × 10^{14} hertz. What is the energy of a
photon of this light?
(1) 2.59 × 10^{−40} J (3) 5.10 × 10^{−19} J
(2) 6.92 × 10^{−31} J (4) 3.90 × 10^{−7} J Answer: 3
28 A 3.00 × 10^{−9}coulomb test charge is placed near
a negatively charged metal sphere. The sphere
exerts an electrostatic force of magnitude
6.00 × 10^{−5} newton on the test charge. What is
the magnitude and direction of the electric field
strength at this location?
(1) 2.00 × 10^{4} N/C directed away from the
sphere
(2) 2.00 × 10^{4} N/C directed toward the sphere
(3) 5.00 × 10^{−5} N/C directed away from the
sphere
(4) 5.00 × 10^{−5} N/C directed toward the sphere Answer: 2
29 What is characteristic of both sound waves and
electromagnetic waves?
(1) They require a medium.
(2) They transfer energy.
(3) They are mechanical waves.
(4) They are longitudinal waves. Answer: 2
30 A small object is dropped through a loop of wire
connected to a sensitive ammeter on the edge of
a table, as shown in the diagram below.
A reading on the ammeter is most likely
produced when the object falling through the
loop of wire is a
(1) flashlight battery (3) brass mass
(2) bar magnet (4) plastic ruler Answer: 2
31 What is the wavelength of a 2.50kilohertz sound
wave traveling at 326 meters per second through
air?
(1) 0.130 m (3) 7.67 m
(2) 1.30 m (4) 130. m Answer: 1
32 Ultrasound is a medical technique that transmits
sound waves through soft tissue in the human
body. Ultrasound waves can break kidney stones
into tiny fragments, making it easier for them to
be excreted without pain. The shattering of
kidney stones with specific frequencies of sound
waves is an application of which wave
phenomenon?
(1) the Doppler effect (3) refraction
(2) reflection (4) resonance Answer: 4
33 In the diagram below, a stationary source located
at point S produces sound having a constant
frequency of 512 hertz. Observer A, 50. meters to
the left of S, hears a frequency of 512 hertz.
Observer B, 100. meters to the right of S, hears a
frequency lower than 512 hertz.
Which statement best describes the motion of
the observers?
(1) Observer A is moving toward point S, and
observer B is stationary.
(2) Observer A is moving away from point S, and
observer B is stationary.
(3) Observer A is stationary, and observer B is
moving toward point S.
(4) Observer A is stationary, and observer B is
moving away from point S. Answer: 4
34 While sitting in a boat, a fisherman observes that
two complete waves pass by his position every
4 seconds. What is the period of these waves?
(1) 0.5 s (3) 8 s
(2) 2 s (4) 4 s Answer: 2
35 A wave passes through an opening in a barrier.
The amount of diffraction experienced by the
wave depends on the size of the opening and the
wave’s
(1) amplitude (3) velocity
(2) wavelength (4) phase Answer: 2
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 length of a football field is closest to
(1) 1000 cm (3) 1000 km
(2) 1000 dm (4) 1000 mm Answer: 2
37 A student on an amusement park ride moves in a
circular path with a radius of 3.5 meters once
every 8.9 seconds. The student moves at an
average speed of
(1) 0.39 m/s (3) 2.5 m/s
(2) 1.2 m/s (4) 4.3 m/s Answer: 3
38 When a 1.0kilogram cart moving with a speed of
0.50 meter per second on a horizontal surface
collides with a second 1.0kilogram cart initially
at rest, the carts lock together. What is the speed
of the combined carts after the collision?
[Neglect friction.]
(1) 1.0 m/s (3) 0.25 m/s
(2) 0.50 m/s (4) 0 m/s Answer: 3
39 Two elevators, A and B, move at constant speed.
Elevator B moves with twice the speed of
elevator A. Elevator B weighs twice as much as
elevator A. Compared to the power needed to lift
elevator A, the power needed to lift elevator B is
(1) the same (3) half as great
(2) twice as great (4) four times as great Answer: 4
40 What is the maximum height to which a motor
having a power rating of 20.4 watts can lift a
5.00kilogram stone vertically in 10.0 seconds?
(1) 0.0416 m (3) 4.16 m
(2) 0.408 m (4) 40.8 m Answer: 3
41 What is the current in a wire if 3.4 × 10^{19}
electrons pass by a point in this wire every
60. seconds?
(1) 1.8 × 10^{−18} A (3) 9.1 × 10^{−2} A
(2) 3.1 × 10^{−11} A (4) 11 A Answer: 3
42 Which graph represents the relationship
between the magnitude of the gravitational force
exerted by Earth on a spacecraft and the distance
between the center of the spacecraft and center
of Earth? [Assume constant mass for the
spacecraft.]
Answer: 4
43 To increase the brightness of a desk lamp, a
student replaces a 50watt incandescent
lightbulb with a 100watt incandescent lightbulb.
Compared to the 50watt lightbulb, the 100watt
lightbulb has
(1) less resistance and draws more current
(2) less resistance and draws less current
(3) more resistance and draws more current
(4) more resistance and draws less current Answer: 1
44 Electrons in excited hydrogen atoms are in the
n = 3 energy level. How many different photon
frequencies could be emitted as the atoms return
to the ground state?
(1) 1 (3) 3
(2) 2 (4) 4 Answer: 3
45 The diagram below represents a setup for demonstrating motion.
When the lever is released, the support rod withdraws from ball B, allowing it to fall. At the same instant,
the rod contacts ball A, propelling it horizontally to the left. Which statement describes the motion that is
observed after the lever is released and the balls fall? [Neglect friction.]
(1) Ball A travels at constant velocity.
(2) Ball A hits the tabletop at the same time as ball B.
(3) Ball B hits the tabletop before ball A.
(4) Ball B travels with an increasing acceleration. Answer: 2
46 Two speakers, S1 and S2, operating in phase in the same medium produce the circular wave patterns shown
in the diagram below.
At which two points is constructive interference occurring?
(1) A and B (3) B and C
(2) A and D (4) B and D Answer: 2
47 A 100.0kilogram boy and a 50.0kilogram girl, each holding a spring scale, pull against each other as shown
in the diagram below.
The graph below shows the relationship between the magnitude of the force that the boy applies on his
spring scale and time.
Boy’s Force vs. Time
Which graph best represents the relationship between the magnitude of the force that the girl applies on
her spring scale and time?
Answer: 1
48 In which diagram do the field lines best
represent the gravitational field around Earth?
Answer: 1
49 A ray of light ( f = 5.09 × 10^{14} Hz) travels through
various substances. Which graph best represents
the relationship between the absolute index of
refraction of these substances and the
corresponding speed of light in these substances?
Answer: 4
50 A pendulum is made from a 7.50kilogram mass
attached to a rope connected to the ceiling of a
gymnasium. The mass is pushed to the side until
it is at position A, 1.5 meters higher than its
equilibrium position. After it is released from
rest at position A, the pendulum moves freely
back and forth between positions A and B, as
shown in the diagram below.
What is the total amount of kinetic energy that
the mass has as it swings freely through its
equilibrium position? [Neglect friction.]
(1) 11 J (3) 110 J
(2) 94 J (4) 920 J Answer: 3
Part B–2
Answer all questions in this part.
Directions (51–65): Record your answers in the spaces provided in your answer booklet. Some questions
may require the use of the 2006 Edition Reference Tables for Physical Setting/Physics.

Base your answers to questions 51 through 53 on the information below.
A student produced various elongations of a spring by applying a series of forces to the spring.
The graph below represents the relationship between the applied force and the elongation of the
spring.
Force vs. Elongation
51 Determine the spring constant of the spring. [1] Answer: MODEL ANSWER GIVEN BELOW51 [1] Allow 1 credit for 20. N/m.
52–53 Calculate the energy stored in the spring when the elongation is 0.30 meter. [Show all work, including
the equation and substitution with units.] [2] Answer: MODEL ANSWER GIVEN BELOW52 [1] Allow 1 credit for the equation and substitutions with units or for an answer that is consistent with
the student’s response to question 51. Refer to Scoring Criteria for Calculations in this rating guide.
Examples of 1credit responses:
53 [1] Allow 1 credit for the correct answer with units or for an answer that is consistent with the student’s
response to question 52.
Example of a 1credit response:
PE_{s} = 0.90 J
Note: Do not penalize the student more than 1 credit for errors in units in questions 52–53.
54–55 Calculate the time required for a 6000.newton net force to stop a 1200.kilogram car initially
traveling at 10. meters per second. [Show all work, including the equation and substitution with
units.] [2] Answer: MODEL ANSWER GIVEN BELOW54 [1] Allow 1 credit for the equation and substitutions with units. Refer to Scoring Criteria for
Calculations in this rating guide.
Examples of 1credit responses:
55 [1] Allow 1 credit for the correct answer with units or for an answer that is consistent with the student’s
response to question 54.
Example of a 1credit response:
t = 2.0 s
Note: Do not penalize the student more than 1 credit for errors in units in questions 54–55.
56–57 A toy rocket is launched twice into the air from level ground and returns to level ground. The rocket
is first launched with initial speed v at an angle of 45° above the horizontal. It is launched the second
time with the same initial speed, but with the launch angle increased to 60.° above the horizontal.
Describe how both the total horizontal distance the rocket travels and the time in the air are affected
by the increase in launch angle. [Neglect friction.] [2] Answer: MODEL ANSWER GIVEN BELOW56 [1] Allow 1 credit for stating that the total horizontal distance would decrease.
57 [1] Allow 1 credit for stating that the time in the air would increase.
58–59 Calculate the magnitude of the average gravitational force between Earth and the Moon. [Show all
work, including the equation and substitution with units.] [2] Answer: MODEL ANSWER GIVEN BELOW58 [1] Allow 1 credit for the equation and substitutions with units. Refer to Scoring Criteria for
Calculations in this rating guide.
Example of a 1credit response:
59 [1] Allow 1 credit for the correct answer with units or for an answer that is consistent with the student’s
response to question 58.
Example of a 1credit response:
Fg = 1.99 × 10^{20} N
Note: Do not penalize the student more than 1 credit for errors in units in questions 58–59.
Base your answers to questions 60 through 63 on the information below.
A 15ohm resistor and a 20.ohm resistor are connected in parallel with a 9.0volt battery. A
single ammeter is connected to measure the total current of the circuit.
60–61 In the space in your answer booklet, draw a diagram of this circuit using symbols from the Reference
Tables for Physical Setting/Physics. [Assume the availability of any number of wires of negligible
resistance.] [2] Answer: MODEL ANSWER GIVEN BELOW60 [1] Allow 1 credit for drawing a parallel circuit containing two resistors or lamps and a battery or a cell.
61 [1] Allow 1 credit for correct placement of the ammeter.
Example of a 2credit response for questions 60–61:
62–63 Calculate the equivalent resistance of the circuit. [Show all work, including the equation and
substitution with units.] [2] Answer: MODEL ANSWER GIVEN BELOW62 [1] Allow 1 credit for the equation and substitutions with units or for an answer that is consistent with
the student’s response to question 60. Refer to Scoring Criteria for Calculations in this rating guide.
Example of a 1credit response:
63 [1] Allow 1 credit for the correct answer with units or for an answer that is consistent with the student’s
response to question 62.
Example of a 1credit response:
Req = 8.6 Ω
Note: Do not penalize the student more than 1 credit for errors in units in questions 62–63.
Base your answers to questions 64 and 65 on the diagram below, which shows a wave in a rope.
64 Determine the wavelength of the wave. [1] Answer: MODEL ANSWER GIVEN BELOW64 [1] Allow 1 credit for 3.2 m.
65 Determine the amplitude of the wave. [1] Answer: MODEL ANSWER GIVEN BELOW65 [1] Allow 1 credit for 0.60 m.
Part C
Answer all questions in this part.
Directions (66–85): Record your answers in the spaces provided in your answer booklet. Some questions
may require the use of the 2006 Edition Reference Tables for Physical Setting/Physics.

Base your answers to questions 66 through 70 on the information below.
A runner accelerates uniformly from rest to a speed of 8.00 meters per second. The kinetic
energy of the runner was determined at 2.00meterpersecond intervals and recorded in the data
table below.
Data Table
Speed (m/s) Kinetic Energy (J)
0.00 0.00
2.00 140.
4.00 560.
6.00 1260
8.00 2240
Directions (66–67): Using the information in the data table, construct a graph on the grid in your answer
booklet following the directions below.
66 Plot the data points for kinetic energy of the runner versus his speed. [1] Answer: MODEL ANSWER GIVEN BELOW66 [1] Allow 1 credit for correctly plotting all points ± 0.3 grid space.
67 Draw the line or curve of best fit. [1] Answer: MODEL ANSWER GIVEN BELOW67 [1] Allow 1 credit for drawing the line or curve of best fit.
Example of a 2credit graph for questions 66 and 67:
Kinetic Energy vs. Speed
Note: Allow credit for an answer that is consistent with the student’s response to question 66.
68–69 Calculate the mass of the runner. [Show all work, including the equation and substitution with units.] [2] Answer: MODEL ANSWER GIVEN BELOW68 [1] Allow 1 credit for the equation and substitutions with units or for an answer that is consistent with
the student’s response to question 67. Refer to Scoring Criteria for Calculations in this rating guide.
Example of a 1credit response:
69 [1] Allow 1 credit for the correct answer with units or for an answer consistent with the student’s
response to question 67 and/or 68.
Example of a 1credit response:
70.0 kg
Note: Do not penalize the student more than 1 credit for errors in units in questions 68–69.
70 A soccer player having less mass than the runner also accelerates uniformly from rest to a speed of
8.00 meters per second. Compare the kinetic energy of the less massive soccer player to the kinetic
energy of the more massive runner when both are traveling at the same speed. [1] Answer: MODEL ANSWER GIVEN BELOW70 [1] Allow 1 credit for indicating that the less massive soccer player has less kinetic energy.
Base your answers to questions 71 through 75 on the information below.
A river has a current flowing with a velocity of 2.0 meters per second due east. A boat is
75 meters from the north riverbank. It travels at 3.0 meters per second relative to the river and is
headed due north. In the diagram below, the vector starting at point P represents the velocity of
the boat relative to the river water.
71–72 Calculate the time required for the boat to cross the river. [Show all work, including the equation and
substitution with units.] [2] Answer: MODEL ANSWER GIVEN BELOW71 [1] Allow 1 credit for the equation and substitutions with units. Refer to Scoring Criteria for
Calculations in this rating guide.
Example of a 1credit response:
72 [1] Allow 1 credit for the correct answer with units or for an answer consistent with the student’s
response to question 71.
Example of a 1credit response:
t = 25 s
Note: Do not penalize the student more than 1 credit for errors in units in questions 71–72.
73 On the diagram in your answer booklet, use a ruler and protractor to construct a vector
representing the velocity of the river current. Begin the vector at point P and use a scale of
1.0 centimeter = 0.50 meter per second. [1] Answer: MODEL ANSWER GIVEN BELOW73 [1] Allow 1 credit for a vector 4.0 cm ± 0.2 cm long, directed to the east. Do not allow credit if the
arrowhead is missing or if the arrowhead is pointing in the wrong direction.
Example of a 1credit response for question 73 and a 1credit response for question 74:
Note: Allow credit even if the vector does not start at point P.
The graphical solution for the resultant, R, shown above, represents the graphical response to
question 74.
74–75 Calculate or find graphically the magnitude of the resultant velocity of the boat. [Show all work,
including the equation and substitution with units or construct the resultant velocity vector in your
answer booklet for question 73, using a scale of 1.0 centimeter = 0.50 meter per second. The value
of the magnitude must be written in your answer booklet in the space for questions 74–75.] [2] Answer: MODEL ANSWER GIVEN BELOW74 [1] Allow 1 credit for the equation and substitutions with units. Refer to Scoring Criteria for
Calculations in this rating guide.
Examples of 1credit responses:
or
For a graphic response, allow 1 credit for constructing a vector diagram in the student answer
space for question 73, with a resultant vector 7.2 cm ± 0.2 cm long or for an answer that is consis
tent with the student’s response to question 73. To receive this credit, the arrowheads must be cor
rectly drawn.
75 [1] Allow 1 credit for the correct answer with units or for an answer that is consistent with the student’s
response to question 73 and/or 74.
Examples of 1credit responses:
c = 3.6 m/s or hypotenuse = 3.6 m/s or R = 3.6 m/s
or
For a graphic response, allow 1 credit for 3.6 m/s ± 0.1 m/s.
Note: Do not penalize the student more than 1 credit for errors in units in questions 74–75.
Base your answers to questions 76 through 80 on the information below.
A light ray ( f = 5.09 × 1014 Hz) is refracted as it travels from water into flint glass. The path of
the light ray in the flint glass is shown in the diagram below.
76 Using a protractor, measure the angle of refraction of the light ray in the flint glass. [1] Answer: MODEL ANSWER GIVEN BELOW76 [1] Allow 1 credit for 37° ± 2°.
77–78 Calculate the angle of incidence for the light ray in water. [Show all work, including the equation and
substitution with units.] [2] Answer: MODEL ANSWER GIVEN BELOW77 [1] Allow 1 credit for the equation and substitutions with units or for an answer that is consistent with
the student’s response to question 76. Refer to Scoring Criteria for Calculations in this rating guide.
Example of a 1credit response:
78 [1] Allow 1 credit for the correct answer with units or for an answer consistent with the student’s
response to question 77.
Example of a 1credit response:
θ_{1} = 49°
Note: Do not penalize the student more than 1 credit for errors in units in questions 77–78.
79 Using a protractor and straightedge, on the diagram in your answer booklet, draw the path of the
incident light ray in the water. [1] Answer: MODEL ANSWER GIVEN BELOW79 [1] Allow 1 credit for drawing the incident ray at an angle of incidence of 49° ± 2°.
Example of a 1credit response:
Note: Allow credit for an answer that is consistent with the student’s response to question 78.
80 Identify one physical event, other than transmission or refraction, that occurs as the light interacts
with the waterflint glass boundary. [1] Answer: MODEL ANSWER GIVEN BELOW Allow 1 credit. Acceptable responses include, but are not limited to:
— reflection
— absorption
— The speed of the wave decreases upon entering the flint glass.
— wavelength decreases
Base your answers to questions 81 through 85 on the information below.
Two experiments running simultaneously at the Fermi National Accelerator Laboratory in
Batavia, Ill., have observed a new particle called the cascade baryon. It is one of the most massive
examples yet of a baryon—a class of particles made of three quarks held together by the strong
nuclear force—and the first to contain one quark from each of the three known families, or
generations, of these elementary particles.
Protons and neutrons are made of up and down quarks, the two firstgeneration quarks. Strange
and charm quarks constitute the second generation, while the top and bottom varieties make up
the third. Physicists had long conjectured that a down quark could combine with a strange and a
bottom quark to form the threegeneration cascade baryon.
On June 13, the scientists running Dzero, one of two detectors at Fermilab’s Tevatron
accelerator, announced that they had detected characteristic showers of particles from the decay of
cascade baryons. The baryons formed in protonantiproton collisions and lived no more than a
trillionth of a second. A week later, physicists at CDF, the Tevatron’s other detector, reported their
own sighting of the baryon...
Source: D.C., “Pas de deux for a threescoop particle,” Science News, Vol. 172, July 7, 2007
81 Which combination of three quarks will produce a neutron? [1] Answer: MODEL ANSWER GIVEN BELOW Allow 1 credit for udd or up, down, down.
82 What is the magnitude and sign of the charge, in elementary charges, of a cascade baryon? [1] Answer: MODEL ANSWER GIVEN BELOW Allow 1 credit for −1e. Do not allow credit if the negative sign is missing.
83 The Tevatron derives its name from teraelectronvolt, the maximum energy it can impart to a particle.
Determine the energy, in joules, equivalent to 1.00 teraelectronvolt. [1] Answer: MODEL ANSWER GIVEN BELOW Allow 1 credit for 1.60 × 10^{−7} J.
84–85 Calculate the maximum total mass, in kilograms, of particles that could be created in the headon
collision of a proton and an antiproton, each having an energy of 1.60 × 10^{−7} joule. [Show all work,
including the equation and substitution with units.] [2] Answer: MODEL ANSWER GIVEN BELOW84 [1] Allow 1 credit for the equation and substitutions with units. Refer to Scoring Criteria for
Calculations in this rating guide.
Examples of 1credit responses:
85 [1] Allow 1 credit for the correct answer with units or for an answer consistent with the student’s
response to question 84.
Examples of 1credit responses:
m = 3.56 × 10^{−24} kg or m total = 3.56 × 10^{−24} kg
Note: Do not penalize the student more than 1 credit for errors in units in questions 84–85.
Try the Quiz : Physical Setting / Physics  New York Regents June 2012 Exam
