Farsightedness can usually be corrected with
A) cylindrical lenses.
B) achromatic lenses.
C) diverging lenses.
D) converging lenses.
In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state
n = 2?
A) -1.51 eV
B) -6.79 eV
C) -3.40 eV
D) -4.53 eV
E) -5.89 eV
The force of attraction between a – 40.0 μC and + 108 μC charge is 4.00 N. What is the
separation between these two charges?
A) 2.10 m
B) 3.67 m
C) 3.12 m
D) 2.49 m
E) 1.13 m
All of the following are vectors, except
A) mass.
B) acceleration.
C) displacement.
D) velocity.
E) force.
A crane lifts a steel submarine (density = 7.8 103 kg/m3) of mass 20,000 kg. What is the
tension in the lifting cable:
(a) when the submarine is submerged?
(b) when it is entirely out of the water?
A person of mass 50. kg has a wavelength of 4.42 10-36 m when running. How fast is
she running?
A) 4 m/s
B) 1 m/s
C) 3 m/s
D) 2 m/s
E) 5 m/s
A Carnot refrigerator has a COP of 2.0.
(a) What is its efficiency operated as an engine?
(b) Operated as an engine, heat is taken in at 500°.C; what is the exhaust Celsius
temperature?
Which of the following elements would be expected to be most stable?
A) Platinum-195
B) Iron-56
C) Carbon-12
D) Bismuth-209
E) Helium-3
FIGURE 17-3
Fig. 17-3 is the symbol for which of the following?
A) ground
B) switch
C) fuse
D) capacitor
E) resistor
Stacy (S) and David (D) are having a tug-of-war by pulling on opposite ends of a 5.0 kg
rope. Stacy pulls with a 15. N force. What is David’s force if the rope accelerates
toward Stacy at 2.0 m/s2?
A) 25 N
B) 5 N
C) 50 N
D) 3 N
E) 15 N
See Fig. 6-1. The area under the curve on a F – t graph represents
A) impulse.
B) average mass.
C) momentum.
D) work.
E) power.
Phase changes occur with an attendant
A) convection.
B) temperature decrease.
C) temperature remaining constant.
D) temperature increase.
A boy releases his 2.0 kg toy, from rest, at the top of a sliding-pond inclined at 20 above
the horizontal. What will the toy’s speed be after sliding 4.0 m along the sliding-pond?
The coefficient of kinetic friction is 0.20.
A) 3.0 m/s
B) 4.4 m/s
C) 2.2 m/s
D) 5.2 m/s
E) 3.5 m/s
A cylinder of radius R and mass M rolls without slipping down a plane inclined at an
angle θ above horizontal.
(a) What is the torque about the point of contact with the plane?
(b) What is the moment of inertia about the point of contact?
(c) What is the linear speed of the cylinder t seconds after it is released from rest?
Which of the following is a false statement?
A) Sound waves are longitudinal pressure waves.
B) Sound can travel through vacuum.
C) The transverse waves on a vibrating string are different from sound waves.
D) Light travels very much faster than sound.
E) “Pitch” (in music) and frequency have approximately the same meaning.
A spaceship, traveling at WARP 1/2 away from the Earth, launches a shuttle moving
away from the ship at c/2 (c/2 seen from the ship). Classically one expects to see the
shuttle moving at c from the Earth, but relativistically what speed do we expect seen
from the Earth?
A) 0.9c
B) 0.5c
C) 0.8c
D) 0.7c
E) 0.6c
A spear is thrown at you at a very high speed. As it passes, you measure its length as
one-half its normal length. From this measurement, you conclude that the moving
spear’s mass must be
A) one-half its rest mass.
B) twice its rest mass.
C) four times its rest mass.
D) zero.
A 3.0 cm tall statue is 24. cm in front of a concave mirror. The mirror radius of
curvature is 20. cm.
(a) Is the image real or virtual?
(b) How far is the image from the mirror?
(c) Is the image upright or inverted?
(d) How high is the image?
Planning to elope with her boyfriend, Janice slides down a rope from her fourth story
window. As she slides down the rope, she tightens harder on the rope which of course
increases the tension in the rope. When the upward tension in the rope equals Janice’s
weight
A) Janice will slow down.
B) Janice will speed up.
C) Janice will continue down at constant speed.
D) the rope will break.
E) Janice will stop moving down the rope.
“Pressure applied to an enclosed fluid is transmitted to every point in the fluid and to
the enclosure walls” is known as
A) Archimedes’ principle.
B) Bernoulli’s principle.
C) Kepler’s law.
D) Pascal’s principle.
E) Fermet’s principle.
What is the centripetal acceleration of a point on the perimeter of a bicycle wheel of
diameter 70. cm when the bike is moving 8.0 m/s?
A) 91 m/s2
B) 1.8 102 m/s2
C) 2.7 102 m/s2
D) 66 m/s2
E) 2.1 10-2 m/s2
In radioactive dating, carbon-14 is often used. This nucleus emits a single beta particle
when it decays. When this happens, the resulting nucleus is
A) still carbon-14.
B) boron-14.
C) nitrogen-14.
D) carbon-13.
E) carbon-15.
Three identical resistors are connected in parallel to a 12. V battery. What is the voltage
of any one of the resistors?
A) 36. V
B) 18. V
C) 12. V
D) 4. V
E) 3. V
After a rain, one sometimes sees brightly colored oil slicks on the road. These are due to
A) interference effects.
B) polarization effects.
C) diffraction effects.
D) selective absorption of different wavelengths by oil.
E) birefringence.
Tightrope walkers walk with a long flexible rod in order to
A) move faster along the rope.
B) increase their total weight.
C) lower their center of mass.
D) allow both hands to hold onto something.
What is 34 + ( 3) x (1.2465) written with the correct number of significant figures?
A) 37.7
B) 37.74
C) 4 x 101
D) 38
E) 37.7395
A material which has the ability to rotate the direction of polarization of linearly
polarized light is said to be
A) circularly polarized.
B) birefringent.
C) optically active.
D) dichroic.
E) diffraction limited.
With what color light would you expect to be able to see the greatest detail when using
a microscope?
A) blue, because it is brighter
B) red, because of its long wavelength
C) blue, because of its shorter wavelength
D) red, because it is refracted less than other colors by glass
E) The color makes no difference in the resolving power, since this is determined only
by the diameter of the lenses.
In many cartoon shows, a character runs of a cliff, realizes his predicament and lets out
a scream. He continues to scream as he falls. If the physical situation is portrayed
correctly, from the vantage point of an observer at the top of the cliff leaning over the
edge, the pitch of the scream should be
A) higher than the original pitch and constant.
B) higher than the original pitch and increasing as he falls.
C) lower than the original pitch and constant.
D) lower than the original pitch and decreasing as he falls.
E) It is impossible to predict.
At which of the following temperatures would we expect gas molecules to have half the
energy that they have at 100.C?
A) 93. K
B) 50.°C
C) -86.°C
D) -56.°C
E) 323. K
Electric fields produced by changing magnetic fields
A) start on positive charges and end on negative charges.
B) start on negative charges and end on positive charges.
C) are conservative.
D) are nonconservative.
E) do not exist.
A galvanometer has an internal resistance of 100 Ω and deflects full-scale at 2.00 mA.
What size resistor should be added to it to convert it to a milliammeter capable of
reading up to 4.00 mA?
A) 50.0 Ω in series
B) 50.0 Ω in parallel
C) 75.0 Ω in parallel
D) 100 Ω in series
E) 100 Ω in parallel
A solenoid 20. cm long is wound with 5000. turns of wire. What magnetic field is
produced at the center of the solenoid when a current of 10. A flows?
A) 1.4 T
B) 0.84 T
C) 1.6 T
D) 0.67 T
E) 0.31 T