final exam review pdf

Name_________________________________
Per.__________
Spring Semester Review Packet 2015
GL Physics
Scantron must be turned in before Exemptions are signed (NO EXCEPTIONS). Review is graded on
accuracy and is a double quiz grade.
1) If a guitar string of length 0.54m is plucked and producing a wave of frequency 56Hz, what is the
speed of the wave.
a) 0.54m/s
b) 30.24m/s
c) 60.48m/s
d) 103.70m/s
2) A standing wave is produced on a 5m long string. What is the wavelength of the wave produced from
the 4th harmonic.
a) 5m
b) 10m
c) 20m
d) 2.5m
e) 2m
3) The amount of potential energy an object has depends on the path taken to get to a certain height.
a. True
b. False
4) If a positively charged object is used to give a neutral object a charge by contact, the neutral object
gains a _______ charge.
a. Positive
b. Negative
5) Two charged particles held close to each other are released. As they move, the force on each
particle increases. Therefore, the particles have
a. The same sign b. The opposite sign
c. Not enough information is given
6) An attracting force occurs between two charged objects when
a. charges are of unlike signs.
b. charges are of equal magnitude.
c. charges are of like signs.
d. charges are of unequal magnitude.
7) The process of charging a conductor by bringing it near another charged object and then grounding
the conductor is called
a .charging by contact.
c. induction.
b. charging by polarization
d. neutralization.
8) A difference between insulators and conductors is that in conductors
a. Electrons can be removed from atoms easily.
b. Electrons are free to move around.
c. Electrons carry electric charge
d. All of the above
9) When I throw an apple up into the air. While the apple is going UP, gravity does what type of work on
the apple
a. cannot be determined
b. zero c. negative
d. positive
10) Charging a neutral object by touching it with a charged rod is called
a. friction
b. conduction
c. induction
d. grounding
11) Two same charges when brought close together
a. attract
b. repel
c. neutralize each other
d. have no effect
12) What is the spring constant, k
a) The mass of the spring
b) How fast the spring bounces
c) The stiffness of the spring
d) The amplitude of the spring
13) Which of the following is true about insulators?
a) They allow charges to move through them quickly
b) They cannot be used during static electricity labs because they can’t be charged
c) They have tightly bound electrons
d) They have high voltage
14) What happens to the kinetic energy of an object if the speed is quadrupled?
a) Increases by 4
b) Decreases by 4
c) Decreases by 16
d) Increases by 16
e) Decreases by 1/2
15) How is current affected if the time interval decreases while the amount of charge remains the same?
a) The current increases.
b) The current decreases.
c) The current initially increases and then is gradually restored.
d) The current is not affected.
16) A device that measures the amount of strong current in a circuit is
a) potentiometer
b) galvanometer
c) voltmeter
d) ammeter
17) A 10 Ω and 20 Ω resistor are connected in series. They could be replaced with one ____ resistor that
has the same total resistance as the original two.
a. 15 Ω b. 10 Ω
c. 6.7 Ω
d. 30 Ω
e. 20 Ω
18) A 10 Ω and 20 Ω resistor are connected in parallel. They could be replaced with one ____ resistor
that has the same total resistance as the original two.
a. 15 Ω b. 10 Ω
c. 6.7 Ω
d. 30 Ω
e. 20 Ω
19) If there are four resistors connected in series circuit, then the number of current paths is:
a. one
b. two
c. three
d. four
20) If three resistors are connected in parallel, there are _____ paths for the current in the circuit.
a. one
b. two
c. three
d. four
21) The total resistance of a parallel circuit is always _____the resistance on any resistor in the circuit.
a. greater than
b. less than
c. equal to
22) The earth’s magnetic north pole is magnetically
a. north.
b. south.
c. neutral.
23) At a particular instant, an electron moves eastward at speed v in a uniform magnetic field that is
directed straight downward. The magnetic force that acts on it is
a) zero.
b. directed to the north.
c. directed to the south. d. none of the above.
24) An iron rod becomes magnetic when __________.
a. its electrons stop moving and point in the same direction.
b. the net spins of its electrons are in the same direction.
c. positive ions gather at one end and negative ions at the other end.
d. positive charges line up on one side and negative charges on the other side.
e. none of the above
25) The force on an electron moving in a magnetic field will be the largest when its direction:
a) is exactly opposite to the magnetic field direction.
b) is at an angle other than 90 degrees to the magnetic field direction.
c) is the same as the magnetic field direction.
d) is perpendicular to the magnetic field direction.
26) A vertical wire carries a current straight up in a region where the magnetic field vector points due
north. What is the direction of the resulting force on this current?
a) Down
b. North
c. East
d. West
27) If you walk up a flight of stairs and then you run up the same flight of stairs, how does your work and
power relate?
a. Power and work are the same for both walk and run
b. Power and work are greater for run.
c. Work is greater on run and power is the same for both
d. Power is greater on run, work is the same for both.
Matching:
28)
periodic wave
29)
transverse wave
30)
pulse wave
31)
longitudinal wave
a) produced when source of wave’s motion is a periodic
motion
b) a wave whose particles vibrate parallel to the direction of
the wave’s motion
c) a wave whose particles vibrate perpendicular to the
direction of the wave’s motion
d) a wave that consists of a single traveling pulse
32) When a wave is traveling through a medium with a fixed-end,
a) the pulse is inverted and the amplitude of the reflected pulse is equal to the amplitude of the
incident pulse
b. the pulse is not inverted
c. the pulse is inverted and the amplitude of the reflected pulse is twice as big
d. the pulse is not inverted and the amplitude of the reflected pulse is less
33) When a wave is traveling through a medium with a free-end,
a) the pulse is inverted
b) the pulse is not inverted
c) Newton’s third law is demonstrated
d) the last particle is unable to move
34) Interference that occurs when 2 waves meet that have displacement in the opposite direction is
a. destructive
b. instructive
c. constructive
d. restrictive
35) The part of a longitudinal wave where the particles are far apart
a. crest
b. compression
c. Doppler effect
d. rarefaction
36) As a moving sound such as a car horn comes closer to you (but does not pass you), you will hear
a. only a rise in pitch
b. only a drop in pitch
c. a rise in pitch and then a drop in pitch
d. a drop in pitch and then a rise in pitch
Use the figure below to answer the following 2 questions:
37) How many nodes does the standing wave have?
a. One
b. Two
c. Three
d. Four
38) How many antinodes does the standing wave have?
a) One
b. Two
c. Three
d. Four
39) The highness or lowness of a sound is called the
a. wavelength
b. amplitude
c. compression
40) . As the pitch increases, the frequency _______
a. decreases
b. increases
c. stays the same
d. pitch
d. unknown
41) When the frequencies of two sound waves are the same and the two sounds are played at the same
time, you will hear
a. a high pitch sound like a dog whistle
b. no sound at all
c. constructive interference and a louder, even sound
d. alternating constructive and destructive interference which produces beats
42) A singer uses her voice to match the natural frequency of a crystal glass. The glass begins to vibrate
and shatters. This is an example of
a. Constructive interference
b. Destructive interference
c. Resonance
d. answers a and c
43) Which sound will HURT your hearing permanently?
a. sounds above 120 decibels
b. sounds below 20 decibels
c. sounds above 20,000 hertz
d. sounds below 120 hertz
44) A sound wave is a mechanical wave, not an electromagnetic wave. This means that
a. particles of the medium move perpendicular to the direction of energy transport
b. a sound wave transports its energy through a vacuum
c. particles of the medium regularly and repeatedly oscillate about their rest position
d. a medium is required in order for sound waves to transport energy
45) There is an apparent increase in frequency and pitch as the source of a sound
a. moves away from the observer
b. is right next to the observer
c. moves toward the observer
d. is below the observer
46) Use the figure below to answer the following 3 questions:
47) Which wave has a higher frequency?
a. A
b. B
c. C
48) Which wave has the highest amplitude?
a. A
b. B
c. C
49) Which wave has the longest wavelength?
a. A
b. B
c. C
50) Which has a higher speed of sound at room temperature?
a. liquid water
b. oxygen gas
c. liquid methyl alcohol
d. solid copper
51) In Figure 18-2, the sound waves near point B have a __________ frequency than the sound waves
near point A.
a. higher
b. lower
c. same
52) The loudest sound a human can tolerate is called the __________ and the softest sound a human
can hear is called the _________.
a. threshold of hearing, threshold of pain
b. threshold of pain, threshold of softness
c. threshold of busting, threshold of hearing
d. threshold of pain, threshold of hearing
53) Which standing wave consists of just 1 wavelength?
a. A
b. B
c. C
d. D
54) Which of the following is relevant in determining an object’s momentum?
a) Direction
b) Velocity
c) Mass
d) All of the above
55) Which of the following is the number of cycles or vibrations per unit of time?
a) Amplitude
c. Frequency
b) Period
d. Revolution
56) How are frequency and period related in a wave?
a) They are directly related
b) They are inversely related
c) They both measure the time per cycle
d) They are unrelated
57) An amusement park ride has a frequency of 0.05 Hz. What is the ride’s period?
a) 5 s
c. 20 s
b) 10 s
d. 40 s
58) A musical tone sounded on a piano has a frequency of 410 Hz and a wavelength of 0.80 m. What is
the speed of the sound wave?
a) 170 m/s
c) 328 m/s
b) 240 m/s
d) 590 m/s
59) Which of the following types of interference will occur in the figure above?
a) Constructive
b) Destructive
c) Collective
d) Partial constructive
60) How many nodes and antinodes are shown in the standing wave above?
a) 4 Nodes and 4 Antinodes
c) 4 Nodes and 5 Antinodes
b) 4 Nodes and 3 Antinodes
d) 5Nodes and 4 Antinodes
61) Which statement about sound waves is correct?
a) They travel faster through solids than gasses
b) The travel faster through gasses than solids
c) The travel faster through gasses than liquids
d) They travel faster than light
62) Two notes have a beat frequency of 5 Hz. The frequency of one note is 450 Hz. What are the
possible frequencies of the other note?
a) 690 Hz or 700 Hz
c) 580 Hz or 560 Hz
b) 567 Hz or 587 Hz
d) 445 Hz or 455 Hz
63) What happens when a rubber rod is rubbed with a piece of fur, giving the rod a negative charge?
a) Protons are removed from rod
c) Fur is also negatively charged
b) Electrons are added to rod
d) Fur is left neutral
64) The figure above demonstrates charging by
a) Grounding
c) Polarization
b) Induction
d) Contact
65) What is the change in magnitude of electric potential energy in a lightning bolt if 35 C of charge
travels to the ground from a cloud 2000m above the ground in the direction of the field? Assume the
electric field is uniform and has a magnitude of 1.0 x 106 N/C. [-7 x 1010J]
a. 7 x 1010J
b. 3 x 1010J
c. 7 x 10-10J
d. 3 x 10-10J
e. None of the above
66) Impulse can be equated to which of the following?
a) Change in momentum
b) Change in momentum per unit time
c) Force per unit time
d) Mass per unit velocity
67) When Ms. Crutcher says, “Get to work!” She could also say,
a) “Get to the mass times velocity!”
b) “Get to the force times distance!”
c) “Get to the forces times distance times sine of theta!”
d) “Get to the torque!”
68) In the right hand rule, the palm represents which of the following?
a) velocity
b) current
c) magnetic field
d) magnetic force
69) The speed of sound in Plutonium is __________ ____________ the speed of sound in Osmium
(Osmium is the densest element)
a) Equal to
b) Double the
c) Less than
d) Greater than
70) In a wave on a string, to simulate an increase in loudness of a sound wave, one would
a. Increases the loudness of the oscillator
b. Increase the amplitude of the wave
c. Decrease the wavelength of the wave
d. Increase the frequency of the wave
71) The threshold of hearing is
a. 9.8dB
b. 10-12W/m2
c. 9 x 109 W/m2
d. 6.67 x 10-11dB
72) The A 0.35 kg bullet moving at 475 m/s strikes a 2.5-kg wooden block at rest. The bullet passes
through the block, leaving at 275 m/s. How fast is the wooden block moving when the bullet leaves?
Assume the mass of the wooden block does not change significantly.
a) 14m/s
b) 28m/s
c) 56m/s
d) 275m/s
73) A hockey player makes a slap shot with a force of 30 N on the hockey puck for 0.16 seconds. What is
the change in velocity of the hockey puck if it has a mass of 0.5kg?
a) 0m/s
b) 9.6m/s
c) 4.8m/s
d) 12.8m/s
74) A weight lifter lifts a set of weights a vertical distance of 2.00 m. If a constant net force of 350 N is
exerted on the weights, what is the net work done on the weights while lifting them? [700 J]
a. 2J
b. 350J
c. 700J
d. 175J
e. 0J
75) The During a goal-line stand, a 75-kg fullback moving eastward with a speed of 8 m/s collides headon with a 100-kg lineman moving westward with a speed of 4 m/s. The two players collide and stick
together, moving at the same velocity after the collision. Determine the post-collision velocity of the
two players.
a) 1.14m/s west
b) 1.14m/s west
c) 4m/s east
d) 4m/s west
e) None of the above
76) What is the distance between two negative charges of 7.4 x 10 -9 C and 5.3 x 10 -6 C that have a force
of .32 Newton’s between them?
a. 0m
b. 0.033m
c. 0.0011m
d. 5.3m
e. None of the above
77) The energy lost by a substance is equal to the energy gained in a closed system.
a. True
b. False
78) In a magnetized substance, the domains
a) Are randomly oriented
c) line up mainly in one direction
b) Cancel each other
d) cannot be reoriented
79) A stationary positive charge, Q, is located in a magnetic field, B, which is directed toward the right, as
shown in the figure above. The direction of the magnetic force on Q is
a) toward the right
c) down
b) up
d) there is no magnetic force
80) A current-carrying wire 0.50 m long is positioned perpendicular to a uniform magnetic field. If the
current is 10.0 A and there is a resultant force of 3.0 N on the wire due to the interaction of the current
and field, what is the magnetic field strength?
a) 0.6T
c) 1.8 x 103 T
b) 15 T
d) 6.7 x 103 T
81) Electromagnetic waves __________.
a) Can travel through a vacuum
b) must have a medium to travel through
82) .Which of these electromagnetic waves has the shortest wavelength?
a) Light waves
c) Ultraviolet Waves
b) X-Rays
d) Gamma Rays
83) Calculate the current where 15 coulombs of charge pass a point in 3 seconds.
a. 3A
b. 15A
c. 45A
d. 30A
84) The current through a toaster connected to a 120 V source is 8.0 A. What is the power rating (ex: 65
Watts) of the toaster?
a) 65Watts
b) 96Watts
c) 120Watts
d) 960Watts
85) The direction of electric field lines show the __________.
a. size of the field.
c. direction of the force on a test positive charge.
b. strength of the field.
d. all of the above
86) In order for there to be a flow of current from one place to another, there must be a ________.
a. potential difference between the two places.
b. conductor, such as a wire, connecting the two places.
c. Both A and B above
87) How much power is used by a 6.0-V flashlight battery that draws 0.5 A of current?
a. 12 W
b. 6 W
c. 3 W
d. 0.5 W
e. 30 W
88) In order to form an electric circuit, you need to have __________.
a. a complete path for the current.
b. a ΔV source.
c. wires or conductors to connect everything.
d. all of the above
89) When two light bulbs are connected in series, the __________.
a. same amount of current always flows through each bulb.
b. current through each light bulb is proportional only to the resistance of the bulb.
c. neither A nor B
90) When one light bulb in a series circuit containing several light bulbs burns out __________.
a. none of the other bulbs will light up.
b. the other light bulbs burn brighter.
c. nothing changes in the rest of the circuit.
91) In a simple parallel circuit __________.
a. the circuit won't work unless there is a fuse in it.
b. current through each branch is always the same.
c. voltage across each branch is always the same.
d. the value of each resistor is the same.
92) Surrounding every moving electron is __________.
a. a magnetic field.
b. an electric field.
c. both A and B
d. none of the above
93) If the north pole of one magnet is brought near the south pole of another magnet, the poles will ___
a) repel each other.
b. attract each other.
c. not interact with each other at all.
94) If you break a bar magnet in half, each half __________.
a) contains one magnetic pole.
b) becomes unmagnetized.
c) becomes a bar magnet with two poles.
95) Magnetic field lines surrounding a magnet are conventionally drawn __________.
a. from north to south.
b. from south to north.
c. either way.
96) A highly polished finish on a new car provides a ___ surface for ____ reflection. The magnitude of an
electric field is 4.2 x 10 2 N/C. If the force is .90 Newtons, how many Coulombs does the positive
charge have? [.00214 C]
a) 0.00107C
b) 0.00214C
c) 0.00428C
d) 0.90C
97) In order to catch a ball, a baseball player naturally moves his or her hand backward in the direction of
the ball's motion once the ball contacts the hand. This habit causes the force of impact on the players
hand to be reduced in size principally because _
a) a. the resulting impact velocity is lessened
b) the momentum change is decreased
c) the time of impact is increased
d) the time of impact is decreased
e) none of these
Use the following information for questions, 98-100. I have two apples being fired from
cannon. If the first apple has a mass of m1 = 0.5 kg and the second apple has a mass of m2 =
1.0 kg. The cannon is at a height of 15 m. The muzzle velocity of the cannon is 10 m/s.
98) How do their kinetic energies compare?
a) KE1 = 25 J
KE2 = 50J
b) b) KE1 = 50 J KE2 = 50J
c) c) KE1 = 49 J KE2 = 98J
d) d) KE1 = 74 J KE2 = 148J
99) How do their potential energies compare?
a) PE1 = 25 J
PE2 = 50J
b) PE1 = 50 J
PE2 = 50J
c) PE1 = 73.5 J
PE2 = 147J
d) PE1 = 98.5 J
PE2 = 148J
100)
How do their total mechanical energies compare?
a) ME1 = 25 J
ME2 = 50J
b) ME1 = 50 J
ME2 = 50J
c) ME1 = 73.5 J
ME2 = 73.5J
d) ME1 = 98.5 J
ME2 = 197J
Physics Spring Final Formula Sheet – 2015
Electricity and Magnetism
Felec = kcq1q2
r2
Req = R1 + R2 + R3
P=IV
kc = 8.99 x 109
1 = 1 + 1 + 1
Req R1 R2 R3
P = I2 R
∆V = -Ed
PEelectric = -qEd
∆V = kcq
r
V=IR
B = Fmag
qv
I=Q
t
P = ∆V2
R
F = BIL
Momentum and Impulse
a) P=mv
b) I= Ft = m∆V =∆p
c) I = Ft
d) M1 V1i + M2 V2i = M1 V1f + M2 V2f
e) M1 V1i + M2 V2i = ( M1 + M2 )Vf
Waves and Sound
v = λf
λ=2L/n
v(in air) = 331 + 0.6T
f= vn/2L
Energy
Wtotal = Ftotald
W = ∆PE
P = W/t
P = Fv
KE1 + PE1 = KE2 + PE2
KE = ½ mv2 PE = mgh
PE = ½ kx2
Fg = mg
ME = PE + KE
mgh1 + ½ mv12 = mgh2 + ½ mv22
W =∆KE