The dedicated third wire on a 3-prong plug is connected to
A) ground.
B) a fuse.
C) a ground fault interrupter.
D) the “hot” wire.
Natural line broadening can be understood in terms of the
A) de Broglie wave length.
B) uncertainty principle.
C) Schrodinger wave equation.
D) Pauli exclusion principle.
E) quantum numbers.
A charged particle moves with a constant speed through a region where a uniform
magnetic field is present. If the magnetic field points straight upward, the magnetic
force acting on this particle will be maximum when the particle moves
A) upward at an angle of 45 above the horizontal.
B) straight upward.
C) straight downward.
D) horizontally.
If a liquid does not wet the inner surface of a capillary tube inserted into it, the cohesion
of the liquid is ________ the adhesion between the liquid and surface.
A) less than
B) greater than
C) the same as
FIGURE 8-6
NASA puts a satellite in space which consists of two (32. kg each) masses connected by
a 12. meter long light cable, as shown in Fig. 8-6. The entire system initially is rotating
4.0 rpm about an axis (at the center of mass) perpendicular to the cable. Motors in each
mass reel out more cable so that the masses double their separation (to 24. m).
(a) What is the final ROTATIONAL VELOCITY?
(b) The final KINETIC ENERGY is what fraction of the initial?
After filling the 5s level, the next higher level to be filled is
A) 4s.
B) 4d.
C) 5p.
D) 5d.
E) 6s.
A sound source departs from a stationary observer. The frequency heard by the observer
is
A) higher than the source.
B) lower than the source.
C) the same as that of the source.
D) equal to zero.
E) impossible to predict.
Increasing the resistance of a voltmeter’s series resistance
A) converts it to an ammeter.
B) allows it to measure a smaller voltage at full-scale deflection.
C) allows it to measure a larger voltage at full-scale deflection.
D) enables more current to pass through the meter movement at full-scale deflection.
What kind of reactor produces more fissionable fuel than it consumes?
A) LOCA
B) moderated
C) heavy water
D) breeder
The mass of a neutron is ________ the combined mass of a proton and an electron.
A) less than
B) equal to
C) more than
Isotopes of an element have nuclei with
A) the same number of protons, but different numbers of neutrons.
B) the same number of protons, and the same number of neutrons.
C) a different number of protons, and a different number of neutrons.
D) a different number of protons, and the same numbers of neutrons.
E) the same number of protons, but different numbers of electrons.
Ice cream, when eaten, gives about 2100. Calories/kg to the body. On the other hand,
the body must give back energy to warm it up to body temperature (37°C). Assuming
ice cream has similar thermal properties to water:
(a) 1/2 kg produces how much energy?
(b) 1/2 kg absorbs how much energy to reach 37°C?
(c) What is the net gain or loss (eating 1/2 kg ice cream)?
An atomic nucleus has a charge of +40e. What is the magnitude of the electric field at a
distance of 1.0 m from the nucleus?
A) 5.4 x 10-8 N/C
B) 5.6 x 10-8 N/C
C) 5.8 x 10-8 N/C
D) 6.0 x 10-8 N/C
E) 6.2 x 10-8 N/C
A “blown” fuse has
A) moderate resistance.
B) zero resistance.
C) infinite (very large) resistance.
FIGURE 4-14
A 42.0 kg block of ice slides down the plane incline 34.0 in Fig. 4-14. Assuming
friction is negligible, what is the acceleration of the block down the incline?
A) 5.48 m/s2
B) 9.80 m/s2
C) 2.73 m/s2
D) 8.12 m/s2
E) 6.61 m/s2
Since the Helium molecule (He) is 2 times as massive as the Hydrogen molecule (H2),
the speed of sound in Hydrogen is ________ the speed in Helium.
A) 1.41 times
B) two times
C) four times
D) eight times
E) 1/ times
What happens to the half-life of a radioactive substance as it decays?
A) It remains constant.
B) It increases.
C) It decreases.
If you stand in front of a convex mirror, at the same distance from it as its radius of
curvature,
A) you won’t see your image because there is none.
B) you will see your image and you will appear larger.
C) you will see your image and you will appear smaller.
D) you will see your image at your same height.
E) you won’t see your image because it’s focused at a different distance.
When the length of a simple pendulum is tripled, the time for one complete vibration
increases by a factor of
A) 9.
B) 1/9.
C) 3.
D) 1/3.
E) .
FIGURE 7-5
The record playing on the turntable of your stereo is rotating clockwise (as seen from
above in Fig. 7-5). After turning it off, your turntable is slowing down, but hasn’t
stopped yet. The direction of the acceleration of point P (at the left) is
A) graph a.
B) graph b.
C) graph c.
D) graph d.
E) graph e.
The density of water is
A) 1.0 kg/m3.
B) 1.0 Mg/m3.
C) 1.0 103 kg/cm3.
D) 1.0 101 kg/cm3.
E) 1.0 10-3 g/m3.
Is it possible to transfer heat from a hot reservoir to a cold reservoir?
A) theoretically yes, but it hasn’t been accomplished yet
B) yes, but work will have to be done
C) yes; this will happen naturally
D) no!
When two or more capacitors are connected in series to a battery,
A) the total voltage across the combination is the algebraic sum of the voltages across
the individual capacitors.
B) each capacitor carries the same amount of charge.
C) the equivalent capacitance of the combination is less than the capacitance of any of
the capacitors.
D) all of the given answers
E) none of the given answers
When a 60-W lightbulb is operating on a 120-V household line, what current does it
draw?
A) 0.5 A
B) 120 J/C
C) 2.0 A
D) 1.414 A
E) 40 J/C
How much heat is needed to raise the temperature of 200 g of lead (c = 0.11 kcal/kg ∙
C) by 10 °C?
A) 33.0 cal
B) 330 cal
C) 2000 cal
D) 20 kcal
The number of molecules in one mole of a substance
A) depends on the atomic weight of the substance.
B) depends on the density of the substance.
C) depends on the molecular weight of the substance.
D) is the same for all substances.
E) depends on the temperature of the substance.
The slope of a tangent line at a given time value on a velocity versus time graph gives
A) instantaneous velocity.
B) average velocity.
C) instantaneous acceleration.
D) average acceleration
E) none of the given answers.
Given a concave mirror, rays of light originating from the center of curvature reflect off
the mirror and focus at
A) 2 R from the mirror.
B) the focal point.
C) the center of curvature.
D) infinity.
Daisy throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s
before reaching the water below.
(a) When the rock hits the water it is traveling with what horizontal component of
velocity?
(b) What was the total speed just before hitting the water?
A skier, of mass 60. kg, pushes off the top of a frictionless hill with an initial speed of
4.0 m/s. How fast will she be moving after dropping 10. m in elevation?
A) 0.20 km/s
B) 15. m/s
C) 10. m/s
D) 0.15 km/s
E) 49. m/s
A 15. μF capacitor is connected to a 50. V battery and becomes fully charged. The
battery is removed and a slab of dielectric that completely fills the space between the
plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage
across the capacitor’s plates after the slab is inserted?
A) 0.25 kV
B) 10. V
C) 2.0 V
D) 0.10 kV
E) 20. V
A triatomic molecule is modeled as follows: mass m is at the origin, mass 2m is at x =
a, and mass 3m is at x = 2a.
(a) What is the amount of inertia about the origin?
(b) What is the moment of inertia about the center of mass?
A spherical inflated balloon is submerged in a pool of water. If it is further inflated so
that its radius doubles, how is the buoyant force affected?
A) not at all
B) 4 times larger
C) 2 times larger
D) 6 times larger
E) 8 times larger
A 82.0 kg painter stands on a long horizontal board 1.55 m from one end. The 15.5 kg
board is 5.50 m long. The board is supported at each end.
(a) What is the total force provided by both supports?
(b) With what force does the support, closest to the painter, push upward?
Refer to Fig. 5-4. What is the amount of work done by force F2 as the object moves up
the inclined plane?
A) 0 J
B) 12.0 J
C) 16.0 J
D) 24.0 J
E) 20.8 J