PHY 29737

subject Type Homework Help
subject Pages 9
subject Words 1306
subject Authors Paul G. Hewitt

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The correspondence principle applies to
A) theories of submicroscopic phenomena.
B) theories of macroscopic phenomena.
C) all good theories.
The force required to maintain a body at constant velocity in free space is equal to
1) the mass of the body.
2) zero.
3) the weight of the body.
4) the force required to stop it.
5) none of these.
This is in accordance with the law of
6) inertia.
7) action/reaction.
8) gravitation.
9) energy conservation.
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A crate of grapes lifted 10 meters gains 200 J of potential energy. If the same crate is
instead lifted 20 meters, its gain in potential energy is
A) half as much.
B) the same.
C) twice as much.
D) four times as much.
E) more than four times as much.
Light will pass through a pair of Polaroids when their axes are
A) 45 degrees to each other.
B) parallel.
C) either of these
D) neither of these
The chef at the infamous Fattening Tower of Pizza tosses a spinning disk of uncooked
pizza dough into the air. The disk becomes wider during its flight, while its rotational
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speed
A) remains constant.
B) quickens.
C) slows.
What is the wavelength of an electromagnetic wave that has a frequency of 3 kilohertz?
A) less than 1 km
B) 1 km
C) more than 1 km
When an elevator is accelerating upward, the frequency of a pendulum inside
A) increases.
B) decreases.
C) doesn't change.
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You and a friend can share the same space and time measurements when
A) you are side by side at rest.
B) you both are side by side moving at constant velocity.
C) either of these
D) none of these
An apple at rest weighs 1 N. The net force on the apple when it is in free fall is
A) 0 N.
B) 0.1 N.
C) 1 N.
D) 9.8 N.
E) none of the above
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The first scientist to be credited for postulating that Earth circled the Sun was
A) Aristotle.
B) Copernicus.
C) Galileo.
D) Newton.
According to Louis de Broglie, a material particle has
A) particle properties.
B) wave properties.
C) both of these
D) neither of these
Which experiences the greatest electrical force in an electric field?
A) alpha particle
B) beta particle
C) electron
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D) gamma ray
E) all the same
A light aluminum ball and a heavy lead ball of the same size roll down an incline. When
they are halfway down the incline, they will have identical
A) kinetic energies.
B) potential energies.
C) momentum.
D) inertias.
E) none of the above
When two lamps are connected in series to a battery, the electrical resistance that the
battery senses is
A) more than the resistance of either lamp.
B) less than the resistance of either lamp.
C) none of these
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An important feature of the mass spectrometer is that
A) all ions enter the device at equal speeds.
B) ions of different masses bend differently.
C) the greater an ion's mass, the wider its circular arc.
D) a magnetic field exerts forces on moving charged particles.
E) all of the above
Which produces an interference pattern when directed through two suitably spaced
slits?
A) light
B) sound
C) electrons
D) all of the above
E) none of the above
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A certain radioactive isotope placed near a Geiger counter registers 160 counts per
minute. Eight hours later, the counter registers 10 counts per minute. What is the
half-life of the isotope?
A) 8 hours
B) 6 hours
C) 4 hours
D) 2 hours
E) none of the above
In air and in water the same sound travels with different
A) frequencies.
B) speeds.
C) both of these
D) neither of these
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A rock is thrown vertically into the air. At the top of its path the net force on it is
A) less than mg.
B) mg.
C) more than mg.
Consider some water at 6oC. For a slight increase its temperature the water will
A) expand.
B) contract.
C) remain the same.
A block pulled to the left with 15 N and to the right with 5 N at the same time
experiences a net force of
A) 5 N.
B) 10 N.
C) 15 N.
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D) 20 N.
As you recede from a steady light source, the wavelength of the emitted light appears
A) longer.
B) shorter.
C) the same.
Inside an accelerating spaceship in deep space, a sideways-tossed ball will
A) curve as it would in a gravitational field equal to the spaceship's acceleration.
B) follow a straight-line path from one side of the interior to the other.
C) fall in a semi-circular path.
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When Nellie hangs suspended from a pair of ropes that are not vertical, the tension in
each rope is
A) less than half her weight.
B) half her weight.
C) more than half her weight.
D) her weight.
Two spectral lines in a spectrum have frequencies of 2.0 x 1014 Hz and 4.6 x 1014 Hz. A
higher-frequency line in the same spectrum likely has a frequency of
A) 2.6 x 1014 Hz.
B) 6.6 x 1014 Hz.
C) 13.2 x 1014 Hz.
D) none of the above
The tapered shape of the wheel rims that ride on railroad tracks allows opposite wheels
to
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A) in effect, vary their diameters.
B) travel at different linear speeds for the same rotational speed.
C) both of these
D) none of these
Although a magnet can change the direction of travel of an electron beam, it cannot
change its
A) speed
B) kinetic energy.
C) both of these
D) neither of these
The Moon does not crash into Earth because
A) Earth's gravitational field is relatively weak at the Moon.
B) gravitational pull of other planets keeps the Moon up.
C) Moon has a sufficient tangential speed.
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D) Moon has less mass than Earth.
E) none of the above
Which of these relate most to the loudness of sound?
A) wavelength.
B) frequency.
C) speed.
D) amplitude.
E) all of the above
When a 12-V battery powers a single 6-ohm lamp,
A) 2 joules flow in the lamp each second.
B) 6 joules flow in the lamp each second.
C) 12 joules flow in the lamp each second.
D) none of the above
page-pfe
The effects of scaling are beneficial to small creatures
A) that get wet.
B) that fall from great heights.
C) who are hungry.
D) all of the above
E) none of the above
A bridge is more likely to be ice covered than the roadway on a cold day because
A) a bridge is more conducting than ground.
B) a bridge is more commonly wet than ground.
C) heat upwelling from the ground below is absent on a bridge.
D) none of the above

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