After landing on an unexplored Klingon planet, Spock tests for the direction of the
magnetic field by firing a beam of electrons in various directions and by observing the
following:
Electrons moving upward feel a magnetic force in the NW direction;
Electrons moving horizontally North are pushed down;
Electrons moving horizontally South-East are pushed upward.
He naturally concludes that the magnetic field at this landing site is in which direction?
A) W
B) SE
C) NE
D) SW
E) E
Substitute the correct prefix to the fun-word “10-3 mouse”.
A) milli
B) kilo
C) peta
D) pico
E) tera
A rectangular loop of wire of width 10 cm and length 20 cm has a current of 2.5 A
flowing through it. Two sides of the loop are oriented parallel to a uniform magnetic
field of strength 0.037 T, the other two sides being perpendicular to the magnetic field.
The magnitude of the torque on the loop is
A) 0.0093 m∙N.
B) 0.025 m∙N.
C) 0.050 m∙N.
D) 0.0019 m∙N.
E) 0.038 m∙N.
An electron, initially moving at 2.0 104 m/s along the +x-axis, experiences a constant
acceleration of 1010 m/s2 in the +y direction. How far from its starting point is the
electron after 4.0 10-6 seconds?
A) 8.0 m
B) 11.3 m
C) 9.8 m
D) 11.3 cm
E) 8.0 cm
The focal lengths of the objective and eyepiece in a compound microscope are 0.8 cm
and 2.5 cm, respectively. The image formed by the objective is 16 cm from it and the
final image is 25 cm from the eye. What is the total magnification?
A) -19.0
B) -11.0
C) -2.0
D) -100
E) -200
The maximum torque is exerted on a current loop when the plane of the loop is at what
angle to the magnetic field?
A) 45.
B) 0.
C) 135.
D) 90.
E) -45.
Consider diving 30.0 m below the surface of the ocean (density 1.03 grams/cc).
(a) what is the gauge pressure at that depth, in atmospheres?
(b) what is the absolute pressure at that depth, in atmospheres?
(c) If you were in a submarine at that depth, what would be the total force on a 100. cm2
window?
Two astronauts, with masses 60. and 80. kg, are initially at rest in outer space. They
push each other apart. How far has the heavier astronaut moved when the lighter
astronaut has moved 12. m?
A) 12. m
B) 9.0 m
C) 16. m
D) 21. m
E) 7.0 m
Bound electrons have
A) zero energy.
B) infinite energy.
C) positive energy.
D) negative energy.
E) imaginary energy.
What is the Q-value of the following reaction?
14N + 4He = 1p + 17O
(14.003074) (4.002603) (1.007825) (16.999131)
A) 11.91 MeV
B) 1.191 MeV
C) -1.191 MeV
D) 1.279 10-3 MeV
E) -1.279 10-3 MeV
A piece of iron sinks to the bottom of a lake where the pressure is 21. atm. Which
statement best describes what happens to the volume of that piece of iron?
A) There has been no change in the volume of the iron.
B) Its volume becomes 21. times greater.
C) Its volume decreases slightly.
D) Its volume increases slightly.
How far does a beam of light travel in one full year?
A) 80 x 1012 m
B) 95 x 1014 m
C) 30 x 108 m
D) 20 x 1015 m
E) 36 x 1016 m
You are a passenger on a spaceship. As the speed of the spaceship increases, you would
observe
A) the length of your spaceship getting shorter.
B) the length of your spaceship getting longer.
C) the length of your spaceship varying erratically.
D) nothing unusual about the length of your spaceship.
E) cannot be determined from the given information
The resolving power of a microscope refers to the ability to
A) distinguish objects of different colors.
B) form clear images of two points that are very close together.
C) form a very large image.
D) form a very bright image.
E) form a very microscopic image.
FIGURE 26-1
A person onboard spaceship A sees craft B moving away at 92.2% the speed of light
and he sees C approaching at 0.833c (see Fig. 26-1).
(a) Spacecraft B sees C approaching with what speed?
(b) Ship C sees B approaching with what speed?
(c) Ship C sees A approaching at what speed?
(d) Spacecraft B determines A to be moving at what speed?
A solid concrete wall 4.0 m by 2.4 m and 30 cm thick, with a thermal conductivity of
1.3 W/(m∙K), separates a basement at 18°C from the ground outside at 6°C. How much
heat flows through the wall in one hour?
A) 1.8 MJ
B) 1.8 kJ
C) 500 J
D) 5.0 MJ
E) 5.0 kJ
Electric dipoles always consist of two charges that are
A) equal in magnitude; both are negative.
B) equal in magnitude; opposite in sign.
C) unequal in magnitude; opposite in sign.
D) equal in magnitude; both are positive.
When light passes through a prism the color refracted most is
A) green.
B) red.
C) violet.
D) blue.
E) yellow.
If an element of atomic number 15 has an isotope of mass number 32
A) the number of neutrons in the nucleus is 15.
B) the number of neutrons in the nucleus is 17.
C) the number of protons in the nucleus is 17.
D) the number of nucleons in the nucleus is 15.
E) the number of protons in the nucleus is 32.
An object is placed a distance d in front of a plane mirror. The size of the image will be
A) dependent on the distance d.
B) half as big as the size of the object.
C) twice the size of the object.
D) dependent on where you are positioned when you look at the image.
E) the same size as the object, independent of the distance d or the position of the
observer.
A 3. kg ball of putty moving at 1 m/s collides and sticks to a 2 kg ball initially at rest.
The putty and ball then move with a momentum of
A) 1 N-s.
B) 2 N-s.
C) 4 N-s.
D) 3 N-s.
E) 0 N-s.
An FM radio station broadcasts at 96.7 MHz. What is the wavelength associated with
this broadcast?
A) 3.1 m
B) 0.32 m
C) 2.9 x 1014 m
D) 2.9 x 1016 m
E) not enough information given
According to the selection rules, which of the following transitions is not allowed:
A) n = 3, ℓ = 2 to n = 2, ℓ = 1
B) n = 4, ℓ = 3 to n = 3, ℓ = 2
C) n = 3, ℓ = 1 to n = 1, ℓ = 0
D) n = 2, ℓ = 1 to n = 1, ℓ = 0
E) n = 4, ℓ = 2 to n = 3, ℓ = 2
An object is under the influence of a force as represented by the force vs. position graph
in Fig. 5-7. What is the work done as the object moves from 0 m to 4 m?
A) 20 J
B) 30 J
C) 0 J
D) 40 J
E) 70 J
Two light sources are said to be coherent if they
A) are of the same frequency.
B) are of the same amplitude.
C) are of the same frequency, and maintain a constant phase difference.
D) are of the same frequency and amplitude.
E) are of the same amplitude, and maintain a constant phase difference.
One terminal of a battery is connected to a closed circuit, while the other terminal is left
unconnected. Which of the following statements is true?
A) No current flows through the battery, and the potential of any point in the circuit is
the same.
B) No current flows through the battery, and the potentials of different points in the
circuit are different.
C) Current flows through the battery, and the potential of any point in the circuit is
unchanged.
D) Current flows through the battery, and the potentials of different points in the circuit
are different.
Florence, who weighs 120 lb, stands on a bathroom scale in an elevator. What will she
see the scale read when the elevator is accelerating upward at 2.0 m/s2?
A) 86 lb
B) 1.4 102 lb
C) 96 lb
D) 1.2 102 lb
E) 1.6 102 lb
Middle C has a frequency of 262. Hz. What is the frequency of C an octave higher?
A) 2.10 kHz
B) 786. Hz
C) 0.524 kHz
D) 270. Hz
E) 2.62 kHz
You toss a ball to your friend. The ball reaches its maximum altitude
A) in half of the time it is in the air.
B) in more than half the time it is in the air.
C) in less than half the time it is in the air.
FIGURE 4-7
Consider the Atwood machine in Fig. 4-7. Consider the m1= 33.0kg and m2= 11.0kg,
and the pulley mass is negligible.
(a) Determine the acceleration.
(b) What is the tension in the connecting string?
A capacitor 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.
The polarity of the voltage in a circuit operating at 60 Hz reverses
A) 90 times per second.
B) 30 times per second.
C) 10π times per second.
D) 120 times per second.
E) 60 times per second.
In order to produce a hologram, one needs, in addition to an object and a piece of
photographic film,
A) a beam of monochromatic light and a mirror.
B) a beam of coherent light and a lens.
C) a beam of monochromatic light and a lens.
D) a beam of coherent light and a mirror.
Complete the following reaction:
1n + 10B → 4He + ________
State Kepler’s second law.
What is the magnetic field at the center of a circular loop of wire of radius 4.0 cm when
a current of 2.0 A flows in the wire?
How was Newton able to calculate the period of revolution of the Moon using his
gravitation theory, even though he didn’t know the value of G or the masses of the Earth
and Moon?
State the work-energy principle.
A slide projector has a lens of focal length 150. mm. An image 100. cm 100. cm is
formed of a slide whose dimensions are 50.0 mm 50.0 mm. How far from the lens must
the screen be placed?
What is the magnetic moment of a rectangular loop of 120 turns that carries 6.0 A if its
dimensions are 40. mm 8.0 cm?
Suppose that the build-up of fatty tissue on the wall of an artery decreased the radius by
10%. By how much would the pressure provided by the heart have to be increased to
maintain a constant blood flow?
When charging a capacitor with a battery, how would the internal resistance of the
battery affect the charging of the capacitor?
Discuss similarities and differences between KINETIC ENERGY and MOMENTUM.
An arrow of mass 20. g is shot horizontally into a bale of hay, striking the hay with a
constant velocity of 60. m/s. It penetrates a depth of 20. cm before stopping. What is the
average stopping force acting on the arrow?
It was once thought that a “black hole” absorbed all the radiation falling upon it and
radiated none. If this were true, what would one infer the temperature of a black hole to
be? Actually Stephen Hawking discovered that black holes have a VERY small
probability of radiating. Modifying your first answer, would you now infer a large or
small temperature for a black hole.?
In using ray tracing to graphically locate the image of an object that is placed in front of
a lens, describe three simple rays that you could draw that pass by the head of the
object.
What is the average separation between air molecules at STP?
The moment of inertia of a solid sphere about any diameter is 2/5 MR2. What is the
moment of inertia about an axis that is tangent to the surface?
State Newton’s 1st law in your own words.
A circular loop of one turn and radius 5.0 cm is positioned with its axis parallel to a
magnetic field of 0.60 T. By means of high explosives, the area of the loop is suddenly
reduced to essentially zero in 0.50 ms. What emf is induced in the loop?
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot
day when the temperature is 115.F. Six months later the temperature has dropped to
-2.F. How much space now exists between each rail?
[ linear expansion coef. for steel is 12. x 10-6 C°-1]
What potential difference is required to cause 2.0 A to flow through a resistance of 8.0
Ω?