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When a rigid body rotates about a fixed axis all the points in the body have the same
centripetal acceleration.
The allowed values for the magnetic quantum number, m , are from m = -ℓ to +ℓ.
Electrons come in discrete units of well defined mass and charge, but they also have
wave properties.
The image distance, di, is positive for images in front of a mirror.
The magnitude of a unit vector is one.
An emf is induced in a wire by changing the current in a nearby wire.
A vector quantity is described by both a magnitude and a direction.
The "acceleration of gravity" is 9.8 m/s2 everywhere on the surface of the Earth.
The capacitive reactance increases with the capacitance.
The amount of heat that flows through a rod whose ends are held at different
temperatures is proportional to the length of the rod.
The work done by a variable force in moving an object between two points is equal to
the area under the force versus displacement curve between those two points.
Convective heat transfer can only occur if fluids mediate the energy transfer.
Entropy of the universe is increasing.
Impedance is the total, or effective, opposition to current that takes into account both
resistances and reactances.
Events that are simultaneous in one inertial reference frame are simultaneous in all
inertial reference frames.
An object in motion with constant speed along a straight line can never have nonzero
angular momentum.
In a hydrogen atom, the difference in the energy between adjacent orbit radii increases
with the increasing value of n.
If an object is in unstable equilibrium, any small displacement results in a restoring
force or torque, which tends to return the object to its original equilibrium position.
In Young's double-slit experiment, light coming from each slit arrives in phase at the
first maximum on either side of the central bright fringe.
According to Einstein's theory of general relativity, a ray of light bends in a
gravitational field.
As a system loses the ability to do work, its entropy decreases.
The impulse delivered to an object is equal to the change in the object's velocity.
All nuclei of a given element have the same number of neutrons.
In an inelastic collision, the initial kinetic energy is less than the final kinetic energy.
The acceleration of an object depends only on the object's mass.
A negative velocity, approaching zero, represents a negative acceleration.
The difference between a camera and the human eye is that a camera utilizes a fixed
focal length lens and the eye does not.
Incompressible flow means that the fluid's density is constant.
A wave that travels from a medium of lower index of refraction to a medium of higher
index of refraction undergoes 180 phase changes relative to the incident wave.
When a rigid body rotates about a fixed axis all the points in the body have the same
linear displacement.
Your mass on the moon will be about one-sixth of your mass on Earth.
Sound waves in air are transverse waves.
If + = and A2 + B2 = C2, then the vectors and are oriented
perpendicular relative to one other.
When resistors are connected in parallel, we can be certain that
A) the same current flows in each one.
B) the potential difference across each is the same.
C) the power dissipated in each is the same.
D) their equivalent resistance is greater than the resistance of any one of the individual
resistances.
Which of the following materials has the largest conductivity (at 20C)?
A) copper
B) platinum
C) silver
D) iron
E) glass
Consider a 1.40 kW hair dryer operated on 120. V. What is
(a) the current?
(b) its resistance?
FIGURE 23-3
At which, if any, of the points indicated in Fig. 23-3 should you place your eye if you
wish to see an image of the arrow in the mirror?
A) A
B) B
C) C
D) D
What power contact lens should be used to correct the vision of a farsighted person
whose near point is 80 cm to see something clearly at a distance of 25 cm?
A) 2.8 diopters
B) -2.8 diopters
C) -4.0 diopters
D) -4.2 diopters
E) 4.2 diopters
Breaking a bar magnet in half will produce
A) one North and one South monopole.
B) a single North magnetic monopole.
C) a single South magnetic monopole.
D) two bar magnets.
In Fig. 5-2, showing a pendulum, at what position is the kinetic energy maximum?
A) A
B) B
C) C
FIGURE 8-8
A force is applied to the end of a 2.0 ft long uniform board weighing 50. lb, in order to
keep it horizontal, while it pushes against a wall at the left. If the angle the force makes
with the board is 30 in the direction shown in Fig. 8-8, what is the applied force F?
A) 58. lb
B) 50. lb
C) 29. lb
D) 90. lb
E) 32. lb
FIGURE 7-3
Marilyn (M) and her sister Sheila (S) are riding on a merry-go-round, as shown in Fig.
7-3 (bird's-eye view). Which of the following is true?
A) They have the same speed and the same angular velocity.
B) They have different speeds, and different angular velocities.
C) They have different speeds, but the same angular velocity.
D) They have the same speed, but their angular velocity is different.
A pure inductor is connected to an AC power supply. In this circuit, the current
A) leads the voltage by 90.
B) is in phase with the voltage.
C) lags the voltage by 45.
D) lags the voltage by 90.
E) leads the voltage by 45.
Another name for the POLARIZING ANGLE is the
A) Moles angle.
B) refracted angle.
C) Brewster angle.
D) Land angle.
A proton, of mass m and speed v, strikes an alpha-particle (which consists of 2 protons
and 2 neutrons) at rest. If the collision is completely elastic, what speed will the
α-particle have after the collision? (Assume the neutron's mass equals the proton's
mass.)
A) zero
B) 3/2 v
C) 2/5 v
D) 2/3 v
E) 5/3 v
FIGURE 4-13
A train consists of a caboose (mass = 1000 kg), a car (mass 2000 kg), and an engine car
(mass 2000 kg).
Refer to Fig. 4-13. If the train has an acceleration of 5.50 m/s2, then the tension force in
the coupling between the middle car and the engine car is
A) 8.25 kN.
B) 27.5 kN.
C) 16.5 kN.
D) 5.50 kN.
E) 11.0 kN.
A 1.0-m long wire is carrying a certain amount of current. The wire is placed
perpendicular to a magnetic field of strength 0.20 T. If the wire experiences a force of
0.60 N, what is the magnitude of the current moving through the wire?
A) 2.0 A
B) 1.0 A
C) 3.0 A
D) 4.0 A
E) 5.0 A
FIGURE 7-6
Your starship, the TOP-QUARK, is in a counter-clockwise "parking orbit" around the
planet VULCAN, as shown in Fig. 7-6. In order to achieve escape velocity, the
direction your retro-rockets should be facing is
A) graph a
B) graph b.
C) graph c.
D) graph d.
E) none of the above.
The last page of a book is numbered 764. The book is 3.0 cm thick. What is the average
thickness of a sheet of paper in the book, in centimeters?
A) 0.0039
B) 0.0078
C) 127.3
D) 0.072
E) 254.7
You slam on the brakes of your car in a panic, and skid a certain distance on a straight,
level road. If you had been traveling twice as fast, what distance would the car have
skidded, under the same conditions?
A) It would have skidded 4 times farther.
B) It would have skidded twice as far.
C) It would have skidded times farther.
D) It would have skidded half as far.
E) It is impossible to tell from the information given.
A charged particle moving along a direction perpendicular to the plane of a loop of
current-carrying wire, and which passes through the loop's center, will experience
A) no magnetic force.
B) a magnetic force perpendicular to its velocity.
C) a magnetic torque.
D) a magnetic force parallel to the loop axis.
A solid cylinder with a radius of 10 cm and a mass of 3.0 kg is rotating about its center
with an angular speed of 3.5 rad/s. What is its kinetic energy?
A) 0.18 J
B) 0.092 J
C) 0.96 J
D) 1.05 J
E) 0.53 J
A hydrogen atom is in the 6h state. Determine the principal quantum number.
A) 0
B) 3
C) 5
D) 6
E) 7
What is the minimum distance of two points on the moon that can be just resolved by
the Keck 10. meter telescope in Hawaii (use a wavelength of 600. nm, lunar distance of
380. thousand Km):
(a) if there were no atmosphere?
(b) if the atmosphere limits resolution to 0.2 arc-sec?
Two cars collide head-on on a level friction-free road. The collision was completely
inelastic and both cars quickly came to rest during the collision. What is true about the
velocity of this system's center of mass?
A) It was always zero.
B) It was never zero.
C) It was not initially zero, but ended up zero.
A fire hose is turned on the door of a burning building in order to knock the door down.
This requires a force of 1000. N. If the hose delivers 40. liters per second, what is the
maximum velocity of the stream needed, assuming the water doesn't bounce back?
A) 50. m/s
B) 25 m/s
C) 40. m/s
D) 15. m/s
E) 30. m/s
A seesaw made of a plank of mass 10.0 kg and length 3.00 m is balanced on a fulcrum
1.00 m from one end of the plank. A 20.0-kg mass rests on the end of the plank nearest
the fulcrum. What mass must be on the other end if the plank remains balanced?
A) 6.67 kg
B) 7.50 kg
C) 10.0 kg
D) -10.0 kg
E) 5.00 kg
A crystal diffracted a beam of electrons. The crystal spacing was 0.18 nm and the
maximum scattering occurred at 80. relative to the surface normal. The electrons were
directed normally onto the crystal.
(a) What is the wavelength of the electrons?
(b) What potential difference accelerated the electrons?
If you are measuring the length of a room, the most appropriate SI unit is the
A) kilometer.
B) meter.
C) centimeter.
D) millimeter.
E) micrometer.
Constructive interference of two coherent waves will occur if the path difference is
A) 3/4 λ.
B) 6/2 λ.
C) 3/2 λ.
D) 1/4 λ.
E) 6/4 λ.
Astronaut Jennifer's lifeline to her spaceship comes loose and she finds herself stranded,
"floating" 100. m from the mothership. She throws her 2.00 kg wrench at 20.0 m/s in a
direction away from the ship. If she and her spacesuit have a combined mass of 200. kg
how long does it take her to coast back to her spaceship?
A) 1000. s
B) 750. s
C) 250. s
D) 2.50 minutes
E) 500. s
A Nichrome wire is used as a heating element in a toaster. From the moment the toaster
is first turned on to the moment the wire reaches it maximum temperature, the current
in the wire drops by 20% from its initial value. What is the temperature change in the
wire? The temperature coefficient for Nichrome is α = 0.0004 (C)-1.
A) 200C
B) 400C
C) 500C
D) 100C
E) 300C
All of the following are units used to describe radiation dosage in humans except
A) Curie.
B) Rad.
C) rem.
D) RBE.
E) Sievert
You blow on food to cool it. Blowing increases
A) conduction.
B) convection.
C) radiation.
D) the specific heat.
E) the latent heat.
A 6.0 Ω and a 12. Ω resistor are connected in series to a 36. V battery. What power is
dissipated by the 12.0 Ω resistor?
A) 216. W
B) 486. W
C) 12. W
D) 24. W
E) 48. W
A nearsighted person has her distant vision corrected using a -2.0 D lens. Her
uncorrected near point is 15 cm. What is her near point using this lens if the lens is 2.0
cm from the eye?
A) 17 cm
B) 20 cm
C) 13 cm
D) 18 cm
E) 15 cm
A steel cable spanning a river is 200.000 m long when the temperature is 20.C. What
will be its length when the temperature drops to 0C? (The coefficient of thermal
expansion of steel is 12. x 10-6K-1.)
If kerosene costs 130. Passi per liter, and one dollar buys 227. Passi; what is its cost in
DOLLARS per GALLON? [1.00 gallon = 3.79 liters]
Light of wavelength 0.50 μm illuminates a soap film (n = 1.33). What is the minimum
thickness of film that will give an interference when the light is incident normally on it?
Two children, each of mass 20.0 kg, ride on the perimeter of a small merry-go-round
that is rotating at the rate of 1.0 revolution every 4.0 s. The merry-go-round is a disk of
mass 30. kg and radius 3.0 m. The children now both move halfway in toward the
center to positions 1.5 m from the axis of rotation. Calculate the kinetic energy before
and after, and the final rate of rotation. Explain any changes in energy.
State the condition of stable equilibrium.
An auto is coasting on a level road. It weighs 10. kN. How much work is done by
gravity as it moves horizontally 150. meters?
A motor that can do work at the rate of 2 hp has 60% efficiency. How much current
does it draw from a 120. V line? (1 hp = 746 W)
A friend who is 180. cm tall stands 2.0 m from a plane wall mirror. You stand slightly
behind him, 3.0 m from the wall mirror. How tall must the mirror be if you are to see all
of your friend in the mirror?
If you find you are able to move a positive charge from infinity (far away) to a
particular point without doing any work, can you infer that no other charges are nearby?
How do interference and diffraction differ? How are they similar?
A satellite orbits the Earth once every 6.0 hours in a circle. What is the radius of the
orbit if it is a 2000. Kg satellite?
At what frequency will the Inductive Reactance of 44. mH be equal to the Capacitive
Reactance of a 27. pF capacitor?
Given 3 capacitors: 4.00 μF, 7.00 μF, and 9.00 μF; what is the equivalent capacity if
they are connected in series?
What man-made object exceeded the speed of sound long before the invention of the
airplane or the bullet?
250. J of work is done in compressing a gas adiabatically. What is the change in internal
energy of the gas?
How much heat would be required to melt 1.0 kg of LEAD, initially at room
temperature? Assume room temperature to be 20°C.
(c = 920 J/kg-C
Lf = 0.25 105 J/kg
LV = 8.67 105 J/kg
melts at 328.°C
boils at 1744.°C)
