A 1200. kg ferryboat is moving south at 20. m/s. Its momentum is
A) 1.7 10-3 N∙s
B) 2.4 103 kg∙m/s
C) 1.2 103 kg∙m/s
D) 24. kN∙s
E) 6.0 102 kg∙m/s
A coal-fired plant generates 600 MW of electric power. The plant uses 4.8 x 106 kg of
coal each day. The heat of combustion of coal is 3.3 x 107 J/kg. The steam that drives
the turbines is at a temperature of 300°C, and the exhaust water is at 37°C.
(a) What is the overall efficiency of the plant for generating electric power?
(b) What is the Carnot efficiency?
When a target nucleus is bombarded by an appropriate beam of particles, it is possible
to produce
A) a less massive nucleus, but not a more massive one.
B) a more massive nucleus, but not a less massive one.
C) a nucleus with smaller atomic number, but not one with a greater atomic number.
D) a nucleus with greater atomic number, but not one with a smaller atomic number.
E) a nucleus with either greater or smaller atomic number.
Three identical resistors are connected in parallel to a battery. If the current of 12. A
flows from the battery, how much current flows through any one of the resistors?
A) 12 A
B) 4 A
C) 6 A
D) 18 A
E) 36 A
If sunlight peaks at 0.55 μm wavelength, this infers a surface temperature of the sun of
how many thousand degrees Kelvin?
A) 9.5
B) 5.3
C) 2.5
D) 25.
E) 15.
My battery charger uses 12. watts. At 6.0 cents per kilowatt-hour, how much does it
cost to charge batteries for 24. hours?
A) 0.28 cents
B) 1.4 cents
C) 0.74 cents
D) 1.7 cents
E) 2.3 cents
A horizontal curve on a bobsled run is banked at a 45 angle. When a bobsled rounds this
curve at the curve’s safe speed (no friction needed to stay on the run), what is its
centripetal acceleration?
A) 1.0 g
B) g
C) g /
D) 2.0 g
E) 0.5 g
The lowest tone to resonate in an open pipe of length L is 200 Hz. Which one of the
following frequencies will not resonate in the same pipe?
A) 200 Hz
B) 400 Hz
C) 600 Hz
D) 800 Hz
E) 900 Hz
As the frequency of the AC voltage across an inductor approaches zero, the inductive
reactance of that coil
A) approaches zero.
B) approaches infinity.
C) approaches unity.
D) becomes negative.
When a quark emits or absorbs a gluon, the quark changes
A) its mass.
B) its charge.
C) its color.
D) into an antiquark.
E) into a fermion.
Substitute the correct prefix to the fun-word “1012-tory”.
A) milli
B) kilo
C) giga
D) pico
E) tera
FIGURE 16-3
The net work done in moving an electron from point A at -50. V to point B at +50. V
along the semi-circle path shown in Fig. 16-3 is
A) zero.
B) +1.6 10-17 J.
C) -1.6 10-17 J.
D) -1.6 J.
E) not to be determined; not enough information given.
A nearsighted person has a far point that is 4.2 m from his eyes. What focal length
lenses must he use in his contact lenses to allow him to focus on distant objects?
A) -4.2 m
B) 4.2 m
C) -5.2 m
D) 5.2 m
E) 4.8 m
Three identical capacitors are connected in parallel 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
Which has the greatest effect on the flow of fluid through a pipe? That is, if you made a
10% change in each of the quantities below, which would cause the greatest change in
the flow rate?
A) the fluid viscosity
B) the length of the pipe
C) the pressure difference
D) the radius of the pipe
E) the fluid density
A circular window of 30.0 cm diameter in a submarine can withstand a maximum force
of 1.88 x 106 N. What is the maximum depth to which the submarine can go without
damaging the window?
A) 750 m
B) 2.70 km
C) 945 m
D) 1.33 km
E) 1.20 km
The number of protons in a neutral atom is
A) called the mass number.
B) zero.
C) the same for all elements.
D) equal to the number of electrons.
E) equal to the number of neutrons.
Under what condition is average velocity equal to the average of the object’s initial and
final velocity?
A) This can only occur if there is no acceleration.
B) The acceleration must be constant.
C) The acceleration must be constantly increasing.
D) The acceleration must be constantly decreasing.
E) This can occur only when they are zero.
The resolution limit of a circular aperture telescope is
A) inversely proportional to wavelength.
B) proportional to frequency of light.
C) less than that of a square aperture whose diagonal equals the diameter.
D) inversely proportional to aperture size.
A 200. Ω resistor is rated at 1/4 W.
(a) What is the maximum current it can draw?
(b) What is the maximum voltage that should be applied across it?
Pat is viewing the moon with her new telescope. She is using a 10. mm eyepiece.
Which of the following eyepieces will double the magnification?
A) 40. Diopter
B) 8. mm
C) 200. Diopter
D) 12. mm
E) 5. Diopter
The exchange particles for the weak force are very massive (about 100 times as massive
as a proton). This would lead one to expect that the weak force would
A) act over a very long range.
B) be transmitted at the speed of light.
C) act over a very short range.
D) only act on very massive particles.
When an object is released from rest and falls in the absence of friction, which of the
following is true concerning its motion?
A) Its velocity is constant.
B) Both its acceleration and its velocity are constant.
C) Neither its acceleration nor its velocity is constant.
D) Its acceleration is constant.
An area of 100 cm2 is how many square meters?
A) 1.00
B) 1.00 x 102
C) 1.00 x 10-2
D) 1.00 x 104
E) 1.00 x 10-3
When a neutron collides with a uranium-235 nucleus it can induce a variety of fission
reactions. One such reaction is U + n Xe + Sr + 2 n.
Given the following mass values: Xe, 139.921620 u; Sr, 93.915367 u; U,
235.043924 u; n, 1.008665 u, how much energy is released in this reaction? 1 u =
931.494 MeV/c2.
A) 185 MeV
B) 202 MeV
C) 32.6 MeV
D) 65.7 MeV
E) 98.6 MeV
A large fan placed in a closed room is effective by enhancing
A) conduction.
B) convection.
C) sublimation.
D) radiation.
Galileo’s Law of Inertia is the same as
A) Newton’s First Law.
B) Newton’s Third Law.
C) Kepler’s Law.
D) Newton’s Second Law.
E) Newton’s Law of Universal Gravitation.
What is the difference between 103.5 and 102.24?
A) 1
B) 1.3
C) 1.26
D) 1.260
E) 1.2600
You are designing a generator with a maximum emf 8.0 V. If the generator coil has 200
turns and a cross-sectional area of 0.030 m2, what would be the frequency of the
generator in a magnetic field of 0.030 T?
A) 7.1 Hz
B) 7.5 Hz
C) 8.0 Hz
D) 22 Hz
E) 44 Hz
Black holes
A) are holes in space, devoid of matter.
B) cannot be detected in binary star systems.
C) are the collapsed remnant of stars.
D) are predicted by Einstein’s special theory of relativity.
A Coulomb per second is the same as
A) a watt.
B) an ampere.
C) a volt-second.
D) a Coulomb.
E) a volt per second.
Which of the following is NOT a nuclear “magic number”?
A) 20
B) 8
C) 82
D) 58
E) 28
The intensity of a sound wave is proportional to its
A) wavelength.
B) decibel level.
C) power.
D) Doppler shift.
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160. m drops a
package of supplies. Two seconds later it drops a second package. How far apart will
the two packages land on the ground?
A) 100. m
B) 67.7 m
C) 283. m
D) 162. m
E) 177. m
A closed organ pipe of length 0.750 m is played when the speed of sound in air is 340.
m/s. What is the fundamental frequency?
A) 0.228 kHz
B) 0.113 kHz
C) 570. Hz
D) 57.0 Hz
E) 171. Hz