The index of refraction of a certain medium is 1.5. What is the speed of light in that
medium?
A) 1.0 x 108 m/s
B) 2.0 x 108 m/s
C) 3.0 x 108 m/s
D) 4.0 x 108 m/s
E) 5.0 x 108 m/s
Consider a small satellite moving in a circular orbit (radius r) about a spherical planet
(mass M). The period does not depend upon
A) g at the satellite position.
B) the planet mass.
C) the satellite mass.
D) the radius r.
E) the universal gravitational constant.
In air a concave mirror has a focal length of 30. cm. Under water that same mirror
would have ________ focal length.
A) a larger
B) the same
C) a smaller
At what angle must a fish underwater look in order to see a fisherman at the shore?
(Note: n for water is 1.33.)
A) 41.2
B) 48.8
C) 60.0
D) 36.9
E) 90.0
What effect does an increase in the mass of the virtual exchange particle have on the
range of the force it mediates?
A) decreases it
B) increases it
C) has no appreciable effect
D) decreases charged particle interactions and increases neutral particle interactions
A wooden block slides directly down an inclined plane, at a constant velocity of 6.0
m/s. How large is the coefficient of kinetic friction, μk, if the plane makes an angle of
25. with the horizontal?
A) 0.47
B) 0.91
C) 1.2
D) 0.42
E) 0.37
A planet speeds up in its orbit as it gets closer to the sun because of
A) the torque exerted on the planet by the sun.
B) conservation of energy.
C) conservation of momentum.
D) conservation of angular momentum.
E) inertia.
In an inelastic collision, the final total momentum is
A) more than the initial momentum.
B) less than the initial momentum.
C) the same as the initial momentum.
D) insufficient information to answer
“30/40 vision” is a measure of
A) eyeball size.
B) chromatic aberration.
C) visual acuity.
D) astigmatism.
E) the resolution of the eye.
In a two-slit experiment, the slit separation is 3.00 x 10-5 m. The interference pattern is
created on a screen that is 2.00 m away from the slits. If the 7th bright fringe on the
screen is a linear distance of 10.0 cm away from the central fringe, what is the
wavelength of the light?
A) 100 nm
B) 204 nm
C) 214 nm
D) 224 nm
E) 234 nm
A 1.0-kg object is moving with a constant velocity 2.0 m/s toward the north. There are
two forces acting on the object. One of the forces is 3.0 N north. What is the second
force that acts on the object?
A) 1.0 N north.
B) 3.0 N north.
C) 3.0 N south.
D) 2.0 N north.
E) 0.
The binding energy of a 170Yb atom would be expected to be close to
A) 170. GeV.
B) 17. MeV.
C) 170. MeV.
D) 8. MeV.
E) 1.4 GeV.
If the efficiency of a reversible engine is 28.%,
(a) what is its COP operated as a refrigerator?
(b) what is its COP operated as a heat pump?
A person gazes at a very distant light source. If she now holds up two fingers, with a
very small gap between them, and looks at the light source, she will see
A) a series of bright spots.
B) the same thing as without the fingers, but dimmer.
C) a hazy band of light varying from red at one side to blue or violet at the other.
D) a sequence of closely spaced bright lines.
A car of mass M, traveling with a velocity V, strikes a parked station wagon, whose
mass is 2M. The bumpers lock together in this head-on inelastic collision. What fraction
of the initial kinetic energy is lost in this collision?
A) 1/4
B) 1/9
C) 1/2
D) 2/3
E) 1/3
A 100. gram steel bullet moves at 250. m/s just before imbedding itself into a thick
anchored wood post. If 40.% of the initial kinetic energy goes into heating the bullet
(steel c = 460.J/kg-C):
(a) how hot does the bullet become if it initially is at 25.°C?
(b) what would be the bullet’s temperature if it had been twice as massive ( 2 times 100.
grams)?
A hunter points a rifle horizontally 3.30 m above the ground. The bullet leaves the
barrel at 325. m/s.
(a) How long did it take for the bullet to strike the ground?
(b) How far horizontally did it travel?
Which part of a vibrating string experiences the maximum acceleration?
A) nodes
B) ends
C) antinodes
Which of the following represents the “Mechanical Equivalent of Heat”?
A) 1 ft-lb = 1.36 Joules
B) 1 cal = 3.97 10-3 BTU
C) 1. eV = 1.6 10-19 J
D) 1. J = 1 kg∙m2 / s2
E) 1.00 J = 0.239 cal
At higher altitudes water boils at ________ temperature as/than at sea level.
A) a lower
B) a higher
C) the same
A dielectric is inserted between the plates of an isolated parallel-plate capacitor that
carries a charge Q. What happens to the potential energy stored in the capacitor?
A) The potential energy of the capacitor decreases.
B) The potential energy of the capacitor increases or decreases depending on the value
of the dielectric constant of the capacitor.
C) The potential energy of the capacitor remains the same.
D) The potential energy of the capacitor increases.
E) More information is needed to answer the question.
In order for a photon to eject an electron from a metal’s surface in the photoelectric
effect, the photon’s
A) frequency must be greater than a certain minimum value.
B) wavelength must be greater than a certain minimum value.
C) speed must be greater than a certain minimum value.
D) momentum must be zero.
9/5 of a Fahrenheit degree is equivalent to
A) 273.16 K.
B) 1C.
C) 1 K.
D) 1 C.
E) 373.16 K.
Light of wavelength 687 nm is incident on a single slit 0.75 mm wide. At what distance
from the slit should a screen be placed if the second dark fringe in the diffraction
pattern is to be 1.7 mm from the center of the screen?
A) 0.39 m
B) 0.47 m
C) 0.93 m
D) 1.1 m
E) 1.9 m
A pipe of length L closed at one end is resonating at its fundamental frequency. Which
statement is correct?
A) The wavelength is 4L and there is a displacement node at the pipe’s open end.
B) The wavelength is 4L and there is a displacement antinode at the pipe’s open end.
C) The wavelength is L and there is a displacement node at the pipe’s open end.
D) The wavelength is L and there is a displacement antinode at the pipe’s open end.
What is the longest wavelength of light that can cause photoelectron emission from a
metal that has a work function of 2.20 eV?
A) 417 nm
B) 257 nm
C) 344 nm
D) 564 nm
E) 610 nm
What is the momentum of a 600. nm photon?
A) 2.07 N-s
B) 2.07 eV/c
C) 2.07 KeV/c
D) 2.07 MeV/c
E) 2.07 kN-m
If the net work done on an object is negative, then the object’s kinetic energy
A) decreases.
B) remains the same.
C) increases.
D) is zero.
E) cannot be determined without knowing the object’s mass.
Compared to the velocity of a 400 Hz sound, the velocity of a 200 Hz sound through air
is
A) twice as great.
B) the same.
C) one-half as great.
D) one-fourth as great.
E) none of the above
In the absence of an external force, a moving object will
A) stop immediately.
B) slow down and eventually come to a stop.
C) gradually speed up until it reaches its terminal velocity.
D) move with constant velocity in a straight line.
E) move with constant velocity in a circular orbit.
An incompressible fluid flows steadily through a pipe that has a change in diameter.
The fluid speed at a location where the pipe diameter is 8.0 cm is 1.28 m/s. What is the
fluid speed at a location where the diameter has narrowed to 4.0 cm?
A) 0.32 m/s
B) 0.64 m/s
C) 1.28 m/s
D) 2.56 m/s
E) 5.12 m/s
Consider the Bohr Theory Hydrogen atom.
(a) How much energy is needed to cause a transition of an electron from the 2nd excited
state to the 3rd excited state?
(b) What wavelength photon just has enough energy to initiate the transition?
One side of a normal outlet is at 120 V AC, the other side is at
A) -120 V AC.
B) 0 V.
C) 240 V.
D) 120 V AC.
E) +120 V AC.
A girl throws a stone straight down from a bridge. The stone leaves her hand with speed
of 8.00 m/s at a height of 12 m above the water below. How much time does it take for
the stone to hit the water?
A) 2.58 s
B) 0.95 s
C) 1.8 s
D) 0.41 s
E) 17.3 s
Captain Planet measures the magnetic forces on a proton which is vertically falling at
1996. m/s at the equator (take the Earth’s field to be 0.40 Gauss horizontal and pointing
Northward). What FORCE would she measure? (Give both amount of Newtons and
direction.)
The heat of fusion of lead is 5.9 kcal/kg, the heat of vaporization is 207. cal/kg, and its
melting point is 328°C. How much heat is required to melt 50. g of lead initially at
23°C? (The specific heat of lead is 0.031 kcal/kg-C.)
Choose from the following:
(a) composed of microscopic glassy fibers that slide over each other
(b) a jelly-like substance that fills most of the eye
(c) a circular diaphragm
(d) relays signals to the brain
(e) the central hole
(f) a curved transparent tissue where light first enters the eye
(g) photosensitive receptor cells of which the retina is composed
(h) a light-sensitive surface, upon which the image falls
Match the iris to the best description above.
The heating element in an electric drier operates on 240. V and generates heat at the rate
of 2.00 kW. The heating element shorts out and, in repairing it, the owner shortens the
Nichrome wire by 10%. (Assume the temperature is unchanged, although in reality, the
resistivity of the wire will depend on its temperature.) What effect will the repair have
on the power dissipated in the heating element?
On a day when the speed of sound in air is 340. m/s, a bat emits a shriek whose echo
reaches it later. How far away was the object that reflected back the sound?
A mountain climber of mass 60. kg slips and falls a distance of 4.0 m, at which time he
reaches the end of his elastic safety rope. The rope then stretches an additional 2.0 m
before the climber comes to rest. What is the spring constant of the rope, assuming it
obeys Hooke’s law?
Write the nuclear notation for the following nuclei: Hydrogen-2, Sulfur-33, and
Lead-207.
Consider an equilateral triangle of side 20. cm. A charge of +2.0 μC is placed at one
vertex and charges of -4.0 μC are placed at the other two vertices. Determine the
magnitude and direction of the electric field at the center of the triangle.
Why is it dangerous to probe inside a television set even hours after it has been
unplugged?
Take the lens maker equation and show that a lens which has been turned around
(surface 1 becomes 2 and 2 becomes 1) has the same focal length.
Name five different types of radiation detectors.
A machine gun, of mass 35. kg, fires 50. gram bullets, with a muzzle velocity of 750.
m/s, at the rate of 300. rounds per minute. What is the average force exerted on the
machine gun mount?
Explain how the specific heats of materials are measured using the technique of
calorimetry.
Write the Kirchhoff loop equation for the entire outside loop (see Fig. 18-1).
Three masses are positioned at the following coordinates:
3.0 kg at (3,2); 4.0 kg at (0,-1); and 5.0 kg at (5,-7).
What are the coordinates of the center of mass of the system?
A battery is rated at 12. V and 160. A ∙ h. How much charge does the battery store?
Spock has landed on a newly discovered planet and is instructed to determine its
gravitational strength. He constructs a simple pendulum with a length of 700. mm and
observes 20. full swings in 1 minute and 16.7 seconds. What does he deduce the
“acceleration of gravity” to be from this?
Classical theory predicts that the planets can orbit the Sun quite stably. Why could not
stable orbits be predicted for the atom by simply substituting the electrical attraction for
the gravitational attraction? Why was there a classical crisis in describing the atom?