PHYSICS 54412

subject Type Homework Help
subject Pages 9
subject Words 1174
subject Authors Paul G. Hewitt

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page-pf1
U-235 and Pu-239 are both
A) radioactive isotopes.
B) fissionable isotopes.
C) heavier than lead.
D) all of the above
E) none of the above
Escape speed from Mars is
A) about the same as from Earth.
B) greater than from Earth.
C) less than from Earth.
Which has the greater momentum when moving?
A) a container ship
B) a bullet
C) either of these depending on speed
page-pf2
If the speed of a bicycle is reduced to half before skidding to a stop, it will skid
A) one-eighth as far.
B) one-fourth as far.
C) one-half as far.
D) none of the above
Light refracts when traveling from air into glass because of a change in light's
A) intensity.
B) frequency.
C) speed.
D) all of the above
E) none of the above
page-pf3
Quantum uncertainties are most predominant for simultaneously measuring the speed
and location of
A) a baseball.
B) a spitball.
C) an electron.
D) none of the above
A hunter on level ground fires a bullet at an angle of 10 degrees below the horizontal
while simultaneously dropping another bullet from the level of the rifle. Which bullet
will hit the ground first?
A) the one dropped
B) the one fired
C) both hit at the same time.
When you rapidly stir raw eggs with an eggbeater, the temperature of the eggs
page-pf4
A) increases.
B) decreases.
C) remain unchanged.
D) none of the above
A "burning glass" used to concentrate sunlight in a tiny spot is a
A) converging lens.
B) diverging lens.
C) either of these
D) neither of these
Action and reaction pairs of forces
A) always act simultaneously.
B) may or may not act simultaneously.
C) are independent of time.
page-pf5
Which travels with the greatest speed in a vacuum?
A) radio waves
B) light waves
C) X-rays
D) gamma rays
E) all have the same speed
Sound refraction can occur when the speed of sound
A) remains constant.
B) changes.
C) ranges below supersonic.
D) none of the above
page-pf6
Several paper clips dangle from the north pole of a magnet. The induced pole in the
bottom of the lowermost paper clip is a
A) north pole.
B) south pole.
C) either of these
D) neither of these
The first scientist to be credited for postulating that Earth circled the Sun was
A) Aristotle.
B) Copernicus.
C) Galileo.
D) Newton.
Recall Galileo's Leaning Tower experiment. With negligible air resistance, a heavy and
page-pf7
a light object fall
A) with equal accelerations.
B) with the same increases in speed.
C) to the ground in equal times.
D) all of the above
Evaporation is a cooling process and condensation is
A) a warming process.
B) a cooling process also.
C) neither of these
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
page-pf8
E) none of the above
Newton discovered
A) gravity.
B) that gravity is universal.
C) neither of these
If a loaf of bread is compressed its
A) density decreases.
B) density increases.
C) neither of these
page-pf9
The function of graphite in the first atomic reactor was to
A) slow fast neutrons.
B) emit fast neutrons.
C) moderate uranium isotopes.
D) none of the above
The fact that a thermometer "takes its own temperature" illustrates
A) thermal equilibrium.
B) energy conservation.
C) the difference between heat and internal energy.
D) the fact that molecules are constantly moving.
Three-dimensional viewing was popular in the past with slide projectors. If the slides
for left and right positions in the stereo projector are duplicates of each other
A) depth can be seen.
page-pfa
B) no depth can be seen.
C) only parallax can be seen.
The high temperature of Earth's interior is mainly due to
A) great internal pressure.
B) friction, as plates move past one another.
C) the Earth's natural heat.
D) radioactive processes.
Internal energy is greater in a
A) cup of boiling-hot tea.
B) fire-engine pail of boiling-hot tea.
C) both the same
page-pfb
Which will NOT bend when moving in a magnetic field?
A) alpha particle
B) beta particle
C) gamma ray
D) all bend the same
An atom is excited when one or more of its electrons
A) vibrates.
B) is boosted into higher energy levels.
C) undergoes a frequency change.
D) becomes frantic.
Strictly speaking, the sum of the angles on a triangle equals 180 degrees
page-pfc
A) in flat space.
B) on a spherical surface.
C) on a saddle-shaped surface.
D) all or any of the above
E) none of the above
When a ball thrown straight upwards reaches the very top of its path, its acceleration is
A) zero.
B) 5 m/s2.
C) 10 m/s2.
D) none of the above
A definite method for losing weight is
A) exercise.
B) reduce Calorie intake.
page-pfd
C) maintain a low body temperature.
D) none of the above
An educated scientific guess is a
A) hypothesis.
B) theory.
C) either of these
D) neither of these
Electromagnetic induction is employed in
A) electric power lines.
B) triggering traffic lights.
C) hybrid automobiles.
D) mobile phones.
E) all the above
page-pfe
The water that operates a fission-reactor turbine is
A) not the same water that flows through the reactor.
B) heated to high-pressure steam.
C) without radioactivity.
D) all of the above
E) none of the above
Electric charge distributes itself on conducting surfaces
A) with greater concentration on more curved parts.
B) such that the electric field inside is zero.
C) both of the above
D) none of the above

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