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What is the wavelength of a neutron having a kinetic energy of 0.025 eV? (The mass of
a neutron is 1.67 x 10-27 kg.)
A) 3.7 x 10-24 m
B) 2200 m
C) 1100 m
D) 1.8 x 10-10 m
E) 3.2 x 10-20 m
Assuming a pupil diameter of 3. mm, what is the angular resolution of the human eye at
the middle of the visible spectrum (550. nm)?
A) 0.8 degree
B) 0.8 arc-minute
C) 0.2 degree
D) 0.2 arc-minute
E) 2. milliradian
An insulated container is filled with a mix of 400 g of water at 20.0°C and 60 g of ice at
0.00°C. Assuming negligible heat is exchanged with the container, what is the
temperature of the mixture when it reaches thermal equilibrium?
A) 7.0°C
B) 6.0°C
C) 0.0°C
D) 4.0°C
E) 5.0°C
The type of detector that requires a magnetic field to "view" charged particles is a
A) spark chamber.
B) bubble chamber.
C) scintillation counter.
D) cloud chamber.
E) Geiger tube.
What is created in pair production?
A) a proton and an electron
B) a electron and an antiproton
C) an electron and a positron
D) an electron and a photon
E) a proton and an antiproton
Compared to the wavelength of a 400 Hz sound, the wavelength of a 200 Hz sound in
air is
A) four times as long.
B) twice as long.
C) the same.
D) one-half as long.
E) none of the above
A 1 mF, a 2 mF, and a 3 mF capacitor are connected in series, the combination being
connected across a 9 volt battery.
(a) Which capacitor has the greatest charge?
(b) Which capacitor has the greatest voltage?
When an alpha particle is emitted from an unstable nucleus, the atomic number of the
nucleus
A) decreases by 2.
B) increases by 4.
C) increases by 2.
D) decreases by 4.
E) increases by 6.
An ac generator has 80 rectangular loops on its armature. Each loop is 12 cm long and 8
cm wide. The armature rotates at 1200 rpm about an axis parallel to the long side. If the
loop rotates in a uniform magnetic field of 0.30 T, which is perpendicular to the axis of
rotation, what will be the maximum output voltage of this generator?
A) 20 V
B) 27 V
C) 29 V
D) 33 V
E) 35 V
A toy rocket, of mass 60 g, achieves a velocity of 80 m/s after 3.0 s when fired straight
up. What average thrust force does the rocket engine exert?
A) 3.4 N
B) 1.2 N
C) 2.2 N
D) 3.3 N
E) 1.6 N
What do we mean when we say that two light rays striking a screen are in phase with
each other?
A) When the electric field due to one is a maximum, the electric field due to the other is
also a maximum, and this relation is maintained as time passes.
B) They alternately reinforce and cancel each other.
C) They have the same wavelength.
D) They are traveling at the same speed.
A roller coaster car (mass = M) is on a track that forms a circular loop (radius = r) in the
vertical plane. If the car is to just maintain contact with the track at the top of the loop,
what is the minimum value for its speed at that point?
A) Mrg
B) 2 Mrg
C)
D)
E) /
Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If they are moved to
a new separation of 8.0 cm, what is the electric force between them?
A) 2.0 N
B) 4.0 N
C) 16 N
D) 1/4 N
E) 1/16 N
Most stars radiate much like black bodies. Consider two stars having the same surface
temperature, the second having 10 times the diameter of the first. The power radiated
per unit area is
A) 102 times larger for the 2nd.
B) 10 times larger for the 2nd.
C) the same for both.
D) 104 times larger for the 2nd.
E) 108 times larger for the 2nd.
A beam of light in air enters a glass slab with an index of refraction of 1.40 at an angle
of incidence of 30.0. What is the angle of refraction?
A) 20.9
B) 47.5
C) 51.8
D) 30.0
E) 14.9
One of the most efficient engines built so far has the following characteristics:
combustion chamber temperature = 1900°C; exhaust temperature = 430°C.
7 109 cal of fuel produces 1.4 x 1010 J of work in one hour.
(a) What is the actual efficiency of this engine?
(b) What is the Carnot efficiency of this engine?
An astronaut lands on a previously unknown planet of radius 2350. km and she
measures the acceleration of gravity to be 3.20 m/s2.
(a) What is the mass of this new planet?
(b) What does the astronaut weigh on this new planet if she weighs 384. N on Earth?
Which of the following is a megawatt?
A) 109W
B) 106W
C) 1000 W
D) 10-9W
E) 10-6W
FIGURE 15-2
Which of the arrows shown in Fig. 15-2 represents the correct direction of the electric
field between the two metal plates?
A) A
B) B
C) C
D) D
E) none of the above
1.8 μF and 3.6 μF capacitors are connected in series and then charged by a 24. volt
battery. The battery and capacitors are disconnected and the capacitors reconnected in
parallel (plus to plus, minus to minus).
(a) What charge initially flowed from the battery to the series combination?
(b) What total charge is on the final positive plates?
(c) What final voltage is across the parallel combination?
A proton of mass M rotates with an angular speed of 2 X 106 rad/s in a circle of radius
0.80 m in a cyclotron. What is the orbital angular momentum of the proton? (M = 1.67
X 10-27 kg)
A) 2.1 X 10-21 N-m-s
B) 1.1 X 10-20 N-m-s
C) 2.9 X 10-21 N-m-s
D) 5.3 X 10-21 N-m-s
E) 3.9 x 10-21 N-m-s
What Diopter takes an object at 47. cm and forms an upright image 23. cm from the
lens?
A) +2.2 D
B) -0.022 D
C) -2.2 D
D) 2.2 102 D
E) +0.022 D
A horse-power is equal to 550
A) J/s.
B) Kw-h.
C) ft-lb/minute.
D) ft-lb/s.
E) J/hour.
A mass is attached to a vertical spring and bobs up and down between points A and B.
Where is the mass located when its kinetic energy is a maximum?
A) at either A or B
B) midway between A and B
C) one-fourth of the way between A and B
A ray of light consisting of blue light (wavelength 480 nm) and red light (wavelength
670 nm) is incident on a thick piece of glass at 80. What is the angular separation
between the refracted red and refracted blue beams while they are in the glass? (The
respective indices of refraction for the blue light and the red light are 1.4636 and
1.4561.)
A) 0.277
B) 0.455
C) 0.330
D) 0.155
E) 0.341
Consider a particle composed of quarks.
(a) The negative pion is composed of what combination of up and down quarks?
(b) Is the negative pion a baryon or meson?
(c) Is the negative pion a lepton or a hadron?
In Fig. 18-3, which of the following equations is true?
A) V1 - I1 R1 - I2 R2 + V2 - I2 R3 = 0
B) V1+ I1 R1 - I2 R2 - V2 " I3 R4 = 0
C) V1+ I1 R1 + I2 R2 + V2 + I2 R3 = 0
D) V1- I1 R1 + I2 R2 - V2 + I2 R3 = 0
Which of the following is NOT a unit of pressure?
A) Pascal
B) inches of mercury
C) psi
D) atmosphere
E) N-
Consider an RLC series circuit. The impedance of the circuit increases if XC increases.
A) true only if XL is greater than or equal to XC
B) true only if XL is less than or equal to XC
C) always true
D) never true
A person's face is 30 cm in front of a concave shaving mirror. If the image is an erect
image 1.5 times as large as the object, what is the mirror's focal length?
A) 20 cm
B) 30 cm
C) 50 cm
D) 70 cm
E) 90 cm
When a β- particle is emitted from an unstable nucleus, the atomic number of the
nucleus
A) increases by 1.
B) does not change.
C) decreases by 1.
D) increases by 2.
E) decreases by 2.
When you sit on a chair, the reaction to your weight is
A) zero if in equilibrium.
B) the chair pushing on you.
C) the Earth being pulled up.
D) your push down on the chair.
E) the floor pushing up on the chair.
A proton moving with a velocity of 4.0 x 104 m/s enters a magnetic field of 0.20 T. If
the angle between the velocity of the proton and the direction of the magnetic field is
60, what is the magnitude of the force on the proton?
A) 1.8 x 10-15 N
B) 0.60 x 10-15 N
C) 1.1 x 10-15 N
D) 2.2 x 10-15 N
E) 3.3 x 10-15 N
If the ac peak current through a 100 ohm resistor is 1.7 A, the peak voltage across this
resistor is
A) 289 V.
B) 110 V.
C) 170 V.
D) 210 V.
E) 120 V.
