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If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will
be
A) 50 m/s.
B) 500 m/s.
C) 3000 m/s.
D) 3600 m/s.
When properly used, a hydraulic press, like a wheel and axle, is capable of multiplying
force input.
A) A true statement.
B) A false statement.
C) Yes, and in special cases, energy as well.
If the specific heat capacity of water were lower than it is, a nice hot bath would be a
A) shorter experience.
B) longer experience.
C) same regardless of water's specific heat capacity.
If the atmosphere were about 40 times thicker, the Sun at noon would appear
A) red-orange.
B) orange-green.
C) green-blue.
D) blue-violet.
Two objects move toward each other due to gravity. As the objects get closer and closer,
the force between them
A) increases.
B) decreases.
C) remains constant.
Which would require the greater change in a satellite's orbital speed (8 km/s); slowing
down so it crashes into Earth, or speeding up so it escapes Earth?
A) slowing down
B) speeding up
C) same each way
D) need more information
Figure G-3
A satellite follows an elliptical orbit about a planet as shown. The speed of the satellite
is greatest when the satellite is in position
1) A.
2) B.
3) C.
4) D.
5) same at all points in its orbit.
At which position is there no component of force in the direction of the satellite's
instantaneous velocity?
6) A
7) B
8) C
9) D
10) A component of force exists in the direction of instantaneous velocity at every point
along the orbital path.
Heisenberg's uncertainty principle applies to
A) momentum and position.
B) energy and time.
C) both of these
D) neither of these
A ball rolls along a horizontal track in a certain time. If the track has a dip in it, the time
to roll the length of the track will be
A) less.
B) the same.
C) more.
Magnetic field strength inside a current-carrying coil will be greater if the coil encloses
a
A) vacuum.
B) wooden rod.
C) glass rod.
D) rod of iron.
E) none of the above
When an iron ring is heated, the hole becomes
A) smaller.
B) larger.
C) neither smaller nor larger.
D) either smaller or larger, depending on the ring thickness.
Infrared waves are often called heat waves because they
A) emanate from relatively hot sources.
B) consist of frequencies lower than those of visible light.
C) induce resonance in molecules and increase internal energy in a substance.
D) are the predominant waves emitted by the sun.
Action and reaction pairs of forces
A) always act simultaneously.
B) may or may not act simultaneously.
C) are independent of time.
A good heat conductor is
A) a poor insulator.
B) a good insulator.
C) neither of these
The force that accelerates a rocket in outer space is exerted on the rocket by the
A) rocket's nose cone.
B) rocket's wings.
C) atmospheric pressure.
D) exhaust gases.
E) none of the above
A lunar eclipse occurs when the
A) Sun passes into Earth's shadow.
B) Moon passes into Earth's shadow.
C) Earth passes into the Sun's shadow.
D) Earth passes into the Moon's shadow.
If glass expanded more than mercury, then the column of mercury in a mercury
thermometer would fall when the temperature
A) increases.
B) decreases.
C) neither of these
When a current-carrying wire is bent into a loop, its magnetic field inside the loop
A) weakens.
B) becomes concentrated.
C) cancels.
D) none of the above
The glare seen from water is largely
A) horizontally polarized.
B) vertically polarized.
C) unpolarized.
Spectral lines for an element are often in the
A) infrared region.
B) ultraviolet region.
C) both of these
D) neither of these
In the atoms of most materials the fields of individual electrons
A) cancel one another.
B) partly align.
C) completely align.
Pascal's principle applies to
A) liquids.
B) gases.
C) both of these
D) none of these
Because of absorption, a Polaroid will actually transmit 40% of incident unpolarized
light. Two such Polaroids with their axes aligned will transmit
A) 0%.
B) 40%.
C) 100%.
D) between 0% and 40%.
E) between 40% and 100%.
High-voltage wires in power lines are not high-current wires because the current in
them is
A) not the same as the current that powers the distant load.
B) proportional to the voltage drop from beginning to end of each line, rather low.
C) both of these
D) neither of these
A heavy meterstick has mass m. When the meterstick is thrown like a spear past you at
speed v, you measure its momentum to be 2mv. What do you measure its length to be?
A) 1 m
B) 0.87 m
C) 0.5 m
D) 0.25 m
E) none of the above
Like kinds of magnetic poles repel while unlike kinds of magnetic poles
A) attract.
B) repel also.
C) may attract or repel.
When light is refracted, there is a change in its
A) frequency.
B) wavelength.
C) both of these
D) neither of these
The laser light that can carry more information is
A) red.
B) blue.
C) either of these
D) neither of these
Which wavelengths are shortest?
A) light ray
B) X-ray
C) gamma ray
Archimedes' principle applies to
A) liquids.
B) gases.
C) fluids.
D) all of the above
A 1-kg glider and a 2-kg glider both slide toward each other at 1 m/s on an air track.
They collide and stick. The combined mass moves at
A) 0 m/s.
B) 1/2 m/s.
C) 1/3 m/s.
D) 1/6 m/s.
E) 1.5 m/s.
A block of wood and a block of copper will feel neither hot nor cold to the touch when
they each have
A) equal temperatures.
B) your temperature.
C) equal conductivities.
D) none of the above
The current produced by voltage in a circuit is impeded by
A) electric barriers.
B) closed switches.
C) electric resistance.
D) none of the above
A 10-N falling object encounters 4 N of air resistance. The net force on the object is
A) 0 N.
B) 4 N.
C) 6 N.
D) 10 N.
E) none of the above
