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According to Einstein's theory of general relativity, a ray of light bends in an
accelerated frame of reference.
A wave front is not a surface of constant phase within a wave.
When a rigid body rotates about a fixed axis all the points in the body have the same
tangential speed.
Moving clocks are observed to run more slowly than clocks that are at rest in the
observer's own frame fo reference.
The capacitive reactance is directly proportional to the frequency of the applied ac
signal.
A convex lens always produces a virtual image.
A time-varying magnetic field produces a time-varying electric field.
If a beam of X-rays is scattered from protons instead of electrons, the change in the
wavelength of this X-ray beam for a given angle of scattering decreases.
Farsightedness can be corrected with a converging lens.
The work required to stretch a spring changes linearly with the amount of stretch.
Negative charges, when released, accelerate toward regions of lower electric potential.
A time-varying electric field produces a time-varying magnetic field.
Einstein's theory of general relativity applies to accelerated frames of reference.
An object will float in a fluid if the average density of the object is greater than the
density of the fluid.
When a rigid body rotates about a fixed axis all the points in the body have the same
angular acceleration.
The internal energy of an ideal gas does not depend on the pressure.
A fusion reaction generates energy by combining lighter nuclei into a heavier nucleus,
plus additional particles.
A person with a longer near point can see an object as closely with the unaided eye as
can a person with the shorter near point.
Entropy is a measure of order. The more order there is, the higher the system's entropy.
A force is required for an object to accelerate.
Free fall is the motion of an object subject only to the influence of gravity.
A battery is responsible for supplying a constant current to a circuit.
Nearsightedness can be corrected with a diverging lens.
The focal length of the objective in a microscope is very small as compared to the focal
length of the eyepiece.
A capacitor, in addition to storing charge, also stores electrical energy.
For a pair of oppositely charged parallel plates, the negatively charged plate is at a
lower electric potential than the positively charged one by an amount △V.
A changing magnetic field can produce an electric current.
An object's length is largest when measured by an observer at rest with respect to the
object.
Observers in different inertial frames can disagree about the time separating two events.
A neutron carries a negative charge.
The kinetic coefficient of friction is usually larger than the static coefficient of friction.
The acceleration of an object depends only on the net applied force.
The near point of a normal human eye is infinity.
If no force is applied to a moving object, it will continue to move with constant speed in
a straight line.
Pressure in a fluid decreases with depth.
An observer approaches a stationary 1000 Hz sound source at twice the speed of sound.
The observer hears a frequency of
A) 2000 Hz.
B) 500 Hz.
C) 4000 Hz.
D) 1500 Hz.
E) 3000 Hz.
Liquid Crystal Displays (LCDs) depend upon which of the following for their
operation?
A) coherence
B) polarization
C) diffraction
D) dichroism
E) thin film interference
An oil layer that is 5.0 cm thick is spread smoothly and evenly over the surface of water
on a windless day. What is the angle of refraction in the water for a ray of light that has
an angle of incidence of 45 as it enters the oil from the air above? (The index of
refraction for oil is 1.15, and for water it is 1.33.)
A) 32.1
B) 27.2
C) 35.5
D) 25.6
E) 38.6
A Ping-Pong ball moving East at a speed of 4 m/s collides with a stationary bowling
ball. The Ping-Pong ball bounces back to the West, and the bowling ball moves very
slowly to the East. Which object experiences the greater magnitude impulse during the
collision?
A) Neither; both experienced the same magnitude impulse.
B) It's impossible to tell since the velocities after the collision are unknown.
C) the bowling ball
D) the Ping-Pong ball
A simple pendulum consists of a 0.25-kg spherical mass attached to a massless string.
When the mass is displaced slightly from its equilibrium position and released, the
pendulum swings back and forth with a frequency of 2. Hz. What frequency would have
resulted if a 0.50 kg mass (same diameter sphere) had been attached to the string
instead?
A) 1.41 Hz
B) 2π Hz
C) 2. Hz
D) 1. Hz
E) 4. Hz
If the human eyeball is too short from front to back, this gives rise to a vision defect
that can be corrected by using
A) convex-convex eyeglasses.
B) concave-convex eyeglasses.
C) cylindrical eyeglasses.
D) contact lenses, but no ordinary lenses.
E) shaded glasses (i.e., something that will cause the iris to dilate more).
FIGURE 8-7
A uniform rod has a length of 2.0 m. It is hinged to a wall (at the left end), and held in a
horizontal position by a vertical massless string (at the right end), as shown in Fig. 8-7.
What is the angular acceleration of the rod at the moment the string is released?
A) 15. rad/s2
B) It can't be calculated without knowing the rod's mass.
C) 7.4 rad/s2
D) 11. rad/s2
E) 3.3 rad/s2
In the fission reaction 235U + 1n 141Ba + 92Kr + neutrons, the number of neutrons
produced is
A) 0.
B) 4.
C) 1.
D) 3.
E) 2.
In single-slit diffraction
A) the central maximum is about as wide as the other maxima.
B) the central maximum is much narrower than the other maxima.
C) the central maximum is about twice as wide as the other maxima.
D) the intensities of successive maxima are roughly the same, falling off only gradually
as one goes away from the central maximum.
E) the slit width must be less than one wavelength for a diffraction pattern to be
apparent.
Two point charges of + 20.0 μC and - 8.00 μC are separated by a distance of 20.0 cm.
What is the intensity of electric field E midway between these two charges?
A) 25.2 x 106 N/C directed towards the negative charge
B) 25.2 x 1066 N/C directed towards the positive charge
C) 25.2 x 105 N/C directed towards the negative charge
D) 25.2 x 105 N/C directed towards the positive charge
E) 25.2 x 105 N/C directed towards the negative charge
Wall posters are usually sold curled up in cylindrical cardboard tubes. If the length of
the tube is 84.5 cm, and the diameter of the tube is 2.40 cm, what is the area of the
poster, in cm2? (Assume the poster doesn't overlap itself.)
A) 1529 cm2
B) 203 cm2
C) 637 cm2
D) 382 cm2
E) 605 cm2
Which color of light undergoes the smallest refraction when passing from air to glass?
A) red
B) yellow
C) green
D) violet
E) blue.
You hit a tennis ball over the net. When the ball reaches its maximum height, its speed
is
A) equal to its initial speed.
B) less than its initial speed.
C) greater than its initial speed.
D) zero.
E) g t. ∗
Thermal efficiency (non-Carnot) is
A) Q/T.
B) Q/m.
C) 1 " Qcold/Qhot.
D) Q - W.
E) 1 - Tcold/Thot.
A car travels east and its velocity decreases. The acceleration of the car is in which of
the following directions?
A) Eastward
B) Westward
C) Northward
D) Southward
E) Downward
If you stand in front of a double-concave mirror, exactly at its center of curvature, your
image will appear where you are, but
A) larger and upside down.
B) the same size and upside down.
C) larger and upright.
D) the same size and upright.
A 60. gram toy rocket achieves a speed of 80. m/s after 3.0 s, when fired straight up.
What is the average total force on the rocket during the 3 s?
A) 3.4 N
B) 1.6 N
C) 2.2 N
D) 3.2 N
E) 1.2 N
A thin layer of oil (n = 1.25) is on top of a puddle of water (n = 1.33). If normally
incident 500 nm light is strongly reflected, what is the minimum thickness of the oil
layer?
A) 200 nm
B) 250 nm
C) 100 nm
D) 400 nm
E) 150 nm
As atmospheric pressure increases, what happens to the velocity of sound? (Assume
that all other factors remain constant.)
A) It increases.
B) It decreases.
C) It does not change.
D) It increases on warm days and decreases on cold days.
Marie & Pierre Curie
A) discovered radioactivity.
B) proposed the plum-pudding model.
C) proposed the tiny central nucleus idea.
D) observed back-scattering from nuclei.
E) discovered radium and polonium.
What is the sum of 1123 and 10.3 written with the correct number of significant
figures?
A) 1.13 x 103
B) 1133.3000
C) 1.1 x 103
D) 1133.3
E) 1133
Heavy-water molecules have a mass number of
A) 18.
B) 3.
C) 12.
D) 10.
E) 20.
When a cannon fires a cannonball, the cannon will recoil backward because the
A) momentum of the cannon is greater than the energy of the cannonball.
B) momentum of the cannonball and cannon is conserved.
C) momentum of the cannon is conserved.
D) energy of the cannonball and cannon is conserved.
E) energy of the cannon is greater than the energy of the cannonball.
In order to double the average speed of the molecules in a given sample of gas, the
temperature (measured in Kelvins) must
A) quadruple.
B) reduce to one-fourth its original value.
C) triple.
D) double.
E) reduce to one-half its original value.
Suppose you were to try to create a proton-antiproton pair by annihilation of a very high
energy photon. The proton and the anti-proton have the same masses, but opposite
charges. What energy photon would be required?
A) 1.022 MeV
B) 223. MeV
C) 1.88 GeV
D) 940. MeV
E) 0.47 GeV
Consider the Bohr Theory Hydrogen atom in the 2nd excited state.
(a) Determine the binding energy (eV) of the electron.
(b) What is the radius of the electron orbit?
(c) How far is it from the next higher excited orbit?
Assume a proton in a 1-dim box of width 3.0 fm is in its 1 st excited state.
(a) What is its "kinetic" energy (in eV)?
(b) How close (fm) to the wall of the "box" is the probability density a maximum?
A mirror with a focal length 100 cm has a 4.0 cm object placed 20 cm in front of it.
What is the position of the image?
A) 25 cm behind the mirror
B) 100 cm in front of the mirror
C) 20 cm in front of the mirror
D) 20 cm behind the mirror
E) 25 cm in front of the mirror
A photon has energy of 4.20 eV. To what wavelength does this energy correspond?
A) 321 nm
B) 103 nm
C) 296 nm
D) 412 nm
E) 420 nm
If the visible wavelengths of light range from 400 nm to 750 nm, what is the highest
frequency associated with visible light?
A) 3.0 x 108 Hz
B) 7.5 x 1014 Hz
C) 2.3 x 1020 Hz
D) 4.0 x 1014 Hz
E) 5.0 x 108 Hz
A ship that weighs 10,000 tons (mass 10 million kg) must displace what volume of
fresh water in order to float?
A) 104 m3
B) 107 m3
C) 108 m3
D) 1010 m3
E) 1012 m3
State Kepler's first law.
What is the average power if the current is Io sin(ωt) and the voltage is Vo sin(ωt) ?
A sled of mass 10. kg slides down a flat hill that makes an angle of 10. with the
horizontal. If friction is negligible, what is the resultant force on the sled?
FIGURE 4-8
Three blocks are pulled by a force f of 16.5 Newtons along a frictionless surface, as
shown in Fig. 4-8. What is the acceleration of the system and the tension in the string
between m2 and m3? (m1= 3.3 kg, m2= 1.1 kg, and m3= 2.2 kg)
A submarine must travel how fast (with respect to the water) and be pointed in what
direction such that it moves 10. m/s directly Northward (relative to the Earth) if the
water moves westward at 5.0 m/s?
A 60. kg person walks along a 100. kg log at the rate of 0.8 m/s (with respect to the
log). With what speed does the log move, with respect to the shore?
Suppose that you wish to construct a simple AC generator with an output of 12. V
maximum when rotated at 60. Hz. A magnetic field of 0.050 T is available. If the area of
the rotating coil is 100. cm2, how many turns are needed?
FIGURE 18-15
Fig. 18-15 shows a 40.0 μF capacitor in series with a 5,000. Ω resistor is charged by a
100. V battery. A neon lamp is connected cross the capacitor (in parallel with it). A neon
lamp has a very high resistance before it "fires", i.e., ionizes. When the voltage across it
reaches 70. V, it fires and its resistance drops almost instantaneously to zero. It then
ceases to conduct once the voltage drops below 70. V. This results in periodically
discharging the capacitor. This is the kind of circuit used to make roadside warning
lights at construction sites. Determine the frequency at which the light will blink.
Oil of specific gravity 0.90 is poured on top of a beaker of water. A cube of plastic of
specific gravity 0.95 is placed in the liquid. What fraction of the cube will be immersed
in water?
A rifle bullet is fired at an angle of 30 below the horizontal with an initial velocity of
800 m/s from the top of a cliff 80 m high. How far from the base of the cliff does it
strike the level ground below?
Four charges of equal charge +q are placed at the corners of a rectangle of sides a and b.
What is the potential at the center of the rectangle if q = 2.0 μC, a = 30. mm, and b =
40. mm?
A majorette fastens two batons together at their centers to form an X shape. What is the
moment of inertia of the combination about an axis through the center of the X if each
baton was 1.2 m long and each ball at the end of each baton has a mass of 0.25 kg
(assume negligible mass in the rods)?
A driver, traveling at 22. m/s, slows down her 1500. kg car to stop for a red light. What
work is done by the friction force against the wheels?
FIGURE 18-10
Find the equivalent resistance of the network shown in Fig. 18-10 between points A and
B:
The output voltage of a power supply is V = Vo sin (120. t) volts. At t = 0.010 s the
output voltage is 4.2 V. What is the rms voltage of the generator?
Bohr's atomic theory predicted energy levels for hydrogen of En = (2 π2 k2 e4m)/(hn)2.
If instead we place 1 electron in "orbit" about a bare nucleus of atomic number Z, how
do you expect Z to be incorporated into the En formula and why?
