PHY 10450

subject Type Homework Help
subject Pages 10
subject Words 1480
subject Authors Paul G. Hewitt

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The Moon would be at its fullest just before the time of a
A) solar eclipse.
B) lunar eclipse.
C) both of these
D) neither of these
Which of the following is a scientific statement?
A) candy Bon Bons contain no sugar
B) there are things we will never know about
C) matter is filled with undetectable particles
D) there are parts of the universe that will never be discovered by humans
E) none of the above
Newton's rings will be closer together if illuminated with
A) red light.
B) blue light.
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C) white light.
D) none of the above
The equivalent (combined) resistance of 1-ohm, 2-ohm, and 3-ohm in parallel is about
A) 0.06 ohm.
B) 1 ohm.
C) 1.8 ohms.
D) 6 ohms.
E) 9 ohms.
One kilowatt is a unit of
A) energy.
B) power.
C) voltage.
D) current.
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E) resistance.
Reflection of sound can occur in
A) air.
B) water.
C) both of these
D) neither of these
The lower the temperature of an object, the
A) lower the frequency of radiation it emits.
B) longer the wavelengths it radiates.
C) both of these
D) neither of these
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A car's speed 3 seconds after accelerating from rest at 2 m/s2 is
A) 2 m/s.
B) 3 m/s.
C) 4 m/s.
D) 6 m/s.
What characteristic of light mostly relates to color?
A) frequency
B) amplitude
C) both of these
A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. If
the period of stretch is 2 s while coming to a halt, the jumper's average deceleration is
about
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A) 0.5 g.
B) g.
C) 1.5 g.
D) 2 g.
When Monkey Mo is suspended at rest by holding a rope with one hand and the side of
his cage with the other, all the force vectors that act on him
A) have equal magnitudes.
B) cancel except for his weight vector, mg.
C) have a vector sum of zero.
In drinking soda or water through a straw, we make use of
A) capillary action.
B) surface tension.
C) atmospheric pressure.
D) Bernoulli's principle.
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E) none of the above
Suppose you and your sister travel at different speeds in space and you note a slowing
of her clock. Compared with her clock your sister will notice that your clock runs
A) faster.
B) slower.
C) the same.
D) need more information
The ram of a pile driver drops onto the top of an iron beam, driving it partway into the
ground. The distance that the beam sinks into the ground depends on the
A) initial height of the ram.
B) initial potential energy of the ram.
C) kinetic energy of the ram when it first hits the beam.
D) all of the above
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The mass of an atomic nucleon is nearly
A) twice that of an electron.
B) four times that of an electron.
C) a thousand times that of an electron.
D) two thousand times that of an electron.
There is a greater proportion of carbon-14 in
A) new bones.
B) old bones.
C) same in each
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Iron is a poor choice of nuclear fuel because it releases
A) energy only when fused.
B) energy only when fissioned.
C) no energy when fused or fissioned.
When a skateboarder pushes on a wall,
A) an interaction occurs between the skateboarder and the wall.
B) the wall pushes on the skateboarder.
C) such a push couldn't happen unless the wall pushed on the skateboarder.
D) all the above
E) none of the above
Diffuse reflection occurs when the size of surface irregularities is
A) small compared to the wavelength of the light used.
B) large compared to the wavelength of the light used.
C) microscopic.
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The ratio of the energy of a photon to its frequency is
A) π.
B) Planck's constant.
C) photon speed.
D) photon wavelength.
E) unknown.
If one of the pair of Magdeburg hemispheres were fastened to a strong tree, the force
needed by a single party to pull them apart would be
A) half as much.
B) the same.
C) twice as much.
D) none of the above
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A certain transformer doubles input voltage. If the primary coil draws 10 A of current,
then the current in the secondary coil is
A) 2 A.
B) 5 A.
C) 10 A.
D) 25 A.
E) none of the above
If the Moon had twice as much mass and still orbits Earth at the same distance, ocean
bulges on Earth would be
A) smaller.
B) larger.
C) unequal in size.
D) not significantly different.
E) none of the above
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Dr. Chuck projects a ball horizontally from a lab bench. If the projection speed of the
ball were greater, the time in the air would be
A) less.
B) the same.
C) greater.
It is difficult to see the roadway when driving on a rainy night mainly because
A) light scatters from raindrops and reduces the amount of light reaching your eyes.
B) of additional condensation on the inner surface of the windshield.
C) the film of water on your windshield provides an additional reflecting surface.
D) the film of water on the roadway makes the road less diffuse.
E) none of the above
Stand a broom upright on the end of its pole and let it topple to the floor. Repeat, but
with the bristles end on the floor. The faster fall will be the broom standing on its
A) pole-end.
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B) bristles-end.
C) the same either way.
The form of heat transfer that doesn't depend on a medium is
A) conduction.
B) convection.
C) radiation.
D) all of the above
If you quickly run away from the orchestra at a concert, the frequency of the sound you
hear will be
A) decreased.
B) increased.
C) neither of these.
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On some early automobiles both headlights failed when one bulb burned out. The
headlights were likely connected in
A) parallel.
B) perpendicular.
C) series.
D) haste.
If a fish looks upward at 45o to a pond's water's surface, it will see
A) the pond's bottom.
B) the sky and possibly some tall surroundings.
C) only the water's surface.
D) none of the above
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The kind of molecular motion that mostly relates to the temperature of a substance is
A) translational motion.
B) rotational motion.
C) vibrational motion.
D) all about equally
The mass of matter is due mostly to its
1) protons
2) electrons
while the volume of matter is due mostly to its
3) protons.
4) electrons.
5) none of these
Earth is closer to the Sun in winter than in summer. The orbital speed of Earth about the
Sun is therefore faster during the
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1) summer.
2) winter.
3) is the same for all seasons.
Correspondingly, the gravitational force between the Sun and Earth is strongest during
4) summer.
5) winter.
6) is the same for all seasons.
The speedometer of a car indicates a constant speed of 30 miles per hour. From this we
can say that the acceleration of the car is
1) zero.
2) nonzero.
3) can't really say.
This is because
4) no net force is acting on the car.
5) any reading (other than zero) on the speedometer indicates acceleration.
6) the car may be changing its direction.
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Figure A-5
If the mass per nucleon in atomic nuclei varied as shown in the fictitious plot above,
then nuclear energy would be available from the element iron (atomic no. 26) by the
process of nuclear
1) fission.
2) fusion.
3) both.
4) neither.
Accordingly, krypton (atomic no. 36) would yield energy by nuclear
5) fission.
6) fusion.
7) both.
8) neither.
9) not enough information to say.

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