A transformer changes the 10,000 V power line to 120 V. If the primary coil contains
750 turns, how many turns are on the secondary?
A) 3
B) 0
C) 9
D) 6.3 x 104
E) 2.1 x 104
Relative to a stationary observer, a moving clock
A) always runs slower than normal.
B) always runs faster than normal.
C) keeps its normal time.
D) can do any of the above. It depends on the relative velocity between the observer
and the clock.
E) can do any of the above. It depends on the relative energy between the observer and
the clock.
As the temperature of the air 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 when atmospheric pressure is high and decreases when the pressure is
low.
A distinctive feature of quarks is that they
A) are always observed singly, since they do not readily interact with other particles.
B) have zero charge.
C) have zero rest mass.
D) have fractional electric charge.
The uncertainty in the position of a proton is 0.053 nm. What is the uncertainty in its
speed?
A) 2.2 m/s
B) 0.60 km/s
C) 0.98 km/s
D) 37. m/s
E) 1.2 km/s
Three identical capacitors are connected in series to a battery. If a total charge of Q
flows from the battery, how much charge does each capacitor carry?
A) 9Q
B) 3Q
C) Q
D) Q/3
E) Q/9
FIGURE 8-10
Initially, a 2.00-kg mass is whirling at the end of a string (in a circular path of radius
0.750 m) on a horizontal frictionless surface with a tangential speed of 5 m/s, as shown
in Fig. 8-10. The string has been slowly winding around a vertical rod, and a few
seconds later the length of the string has shortened to 0.250 m. What is the
instantaneous speed of the mass at the moment the string reaches a length of 0.250 m?
A) 75 m/s
B) 15 m/s
C) 225 m/s
D) 3.9 m/s
E) 9.3 m/s
A proton is accelerated from rest through 500. V. It enters a magnetic field of 0.300 T
oriented perpendicular to its direction of motion. Determine:
(a) the radius of the path it follows.
(b) the frequency with which it moves around this path.
What is the binding energy per nucleon for Al? The neutral Al atom has a mass
of 26.981539 u; a neutral hydrogen atom has a mass of 1.007825 u; a neutron has a
mass of 1.008665 u; and a proton has a mass of 1.007277 u. 1 u = 931.494 MeV/c2.
A) 8.3 MeV
B) 6.7 MeV
C) 5.4 MeV
D) 3.4 MeV
E) 2.8 MeV
FIGURE 21-2
Compare the voltage waves from two different AC circuits, as shown in Fig. 21-2. The
absolute value of the phase difference is
A) 180.
B) 45.
C) 90.
D) zero.
E) -90.
Which of the following combinations of nucleons would be the most likely to result in a
stable nucleus? (“Odd” and “even” refer to the numbers of protons and neutrons in the
nucleus.)
A) odd protons, even neutrons
B) even protons, odd neutrons
C) odd protons, odd neutrons
D) even protons, even neutrons
A mass attached to the free end of an ideal spring executes SHM according to the
equation x = 0.50 sin(18. t) where x is in meters and t is in seconds. What is the
maximum velocity of the mass?
A) 3 m/s
B) 3 m/s
C) 9 m/s
D) 36 m/s
E) 3 m/s
FIGURE 23-1
You may have seen ambulances on the street with the letters of the word
AMBULANCE written on the front of them, in such a way as to appear correctly when
viewed in your car’s rear-view mirror. See Fig. 23-1. How do the letters appear when
you look directly at the ambulance?
A) a
B) b
C) c
D) d
E) e
What is the change of entropy associated with 3.0 kg of water freezing to ice at 0.°C?
A) -1.1 kcal/K
B) -0.88 kcal/K
C) 0 kcal/K
D) 1.0 kcal/K
E) +0.88 kcal/K
A certain particle’s energy is known within 10-18 J. What is the minimum uncertainty in
its arrival time at a detector?
A) 10-15 s
B) 10-14 s
C) 10-13 s
D) 10-12 s
E) 10-16 s
Three point charges each equal to 10 microcoulombs are located at x = 1m, x = 2m, and
x = 3m, respectively, on the x-axis. What is the magnitude of the electric field at the
origin?
A) 2.25 x 103 N/C
B) 1.22 x 105 N/C
C) 1.75 x 106 N/C
D) 2.70 x 104 N/C
E) 1.65 x 104 N/C
FIGURE 2-5
Fig. 2-5 represents the velocity of a particle as it travels along the x-axis. What is the
average acceleration of the particle between t = 1 second and t = 4 seconds?
A) 0.33 m/s2
B) 1.7 m/s2
C) 2.0 m/s2
D) 2.5 m/s2
E) 3.5 m/s2
Room temperature is approximately
A) 68. K.
B) 300.F.
C) 300. K.
D) 68.C.
E) -68.F.
SAE No. 10 oil has a viscosity of 0.20 Pa-s. How long would it take to pour 4.0 L of oil
through a funnel with a neck 15. cm long and 2.0 cm in diameter? (Assume the surface
of the oil is kept 6.0 cm above the top of the neck, and neglect any drag effects due to
the upper part of the funnel.)
A) 105 s
B) 52 s
C) 1.5 minutes
D) 46 s
E) 84 s
A system undergoes a reversible cycle that traces a triangle in the p-V plane. In the first
leg of the cycle, the gas contracts at a constant pressure of 100 kPa from 30 L to 22 L;
in the second leg, the pressure increases to 150 kPa, with the volume staying constant.
In the third leg, the pressure and volume change so that the system follows the straight
line that closes the triangle. How much heat is supplied to the system in each cycle?
A) 200 J
B) 300 J
C) – 300 J
D) 400 J
E) – 400 J
A copper wire of 1.0 cm2 cross-sectional area would have to be how long to have a
resistance of 1.0 ohm?
A) 5.9 m
B) 5.9 Mm
C) 5.9 km
D) 5.9 x 102 m
E) 5.9 x 104 m
An object is thrown upwards with a speed of 14 m/s. How high above the projection
point does it reach?
A) 5.0 m
B) 10 m
C) 15 m
D) 20 m
E) 25 m
Consider a closed pipe of length L. What are the wavelengths of the three lowest tones
produced by this pipe?
A) 4L, 2L, L
B) 2L, L, L/2
C) 2L, L, 2L/3
D) 4L, 4L/3, 4L/5
The reaction 2H + 2H → 3H + 1H releases 4.03 MeV of energy. If one kilogram of
deuterium were made to go through this reaction, how much energy would be
produced?
A) 9.7 107J
B) 9.7 1013J
C) 1.9 107J
D) 1.9 1014J
E) 1.9 1011J
A 4.0 μF capacitor is charged to 6.0 V. It is then connected in series with a 3.0 MΩ
resistor and connected to a 12. V battery. How long after being connected to the battery
will the voltage across the capacitor be 9.0 V?
A) 5.5 s
B) 8.3 s
C) 11. s
D) 12. s
E) 17. s
FIGURE 20-4
The three loops of wire shown in Fig. 20-4 are all subject to the same uniform magnetic
field that does not vary with time. Loop 1 oscillates back and forth as the bob in a
pendulum, loop 2 rotates about a vertical axis, and loop 3 oscillates up and down at the
end of a spring. Which loop, or loops, will have an induced emf?
A) Loop 1
B) Loop 2
C) Loop 3
D) Loops 1 and 3
E) Loops 2 and 3
If you wear green sunglasses and look at equations written in white chalk on a
chalkboard, you would see the chalk as
A) green.
B) white.
C) red.
D) black.
E) yellow.
Rayleigh scattering would have 400. nm light be scattered how many times as much as
800. nm light?
A) 32
B) 4
C) 8
D) 2
E) 16
What is the slit spacing of a diffraction necessary for a 600 nm light to have a first order
principal maximum at 25.0?
A) 1.42 μm
B) 2.01 μm
C) 3.12 μm
D) 4.12 μm
E) 5.44 μm
An element with atomic number 88 goes through alpha decay. Its atomic number is now
A) 80.
B) 82.
C) 84.
D) 86.
E) 88.
Mathilda collects photoelectric data in her physics laboratory. She measures a stopping
potential of 5.82 volts for radiation of wavelength 100. nm, and 17.99 volts stops 50.0
nm.
(a) What is the work function for the material in eV?
(b) From her data one determines Planck’s constant to be what?
Consider a human heart rate of 80 beats per minute. If someone’s heart beats at that rate
over a 70-yr lifetime, how many times would it beat?
A) 2.20 x 109
B) 7.44 x 105
C) 3.26 x 1010
D) 2.95 x 109
E) 1.78 x 107