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The conversion of mass to energy of other forms via nuclear fission is
A) less than 1%.
B) about 10%.
C) about 20%.
D) about 30%.
E) more than 30%.
Answer:
A block of Styrofoam floats on water while a lead block of the same size block lies
submerged in the water. The buoyant force is greatest on the
A) lead.
B) Styrofoam.
C) same for both
Answer:
In the equation E = hf, the symbol h stands for
A) half-life.
B) momentum as it pertains to light.
C) energy per photon wavelength.
D) none of the above
Answer:
Atmospheric molecules do not fly off into outer space due to
A) their chaotic speeds.
B) their relatively low densities.
C) Earth gravitation.
D) cohesive forces.
Answer:
Underlying the concept of self-induction is
A) Ohm's law.
B) Faraday's law.
C) Maxwell's law.
D) all of these about equally
Answer:
Carbon was used in Fermi's first nuclear reactor to
A) slow neutrons.
B) increase the speed of neutrons.
C) absorb neutrons.
D) none of the above
Answer:
Reflection of sound can occur in
A) air.
B) water.
C) both of these
D) neither of these
Answer:
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.
Answer:
Just as "gravity" is the study of a wide range of gravitational interactions, "electricity"
is the study of a wide range of
A) electrical charges.
B) electrical forces.
C) electrical interactions.
D) none of the above
Answer:
The redness of the lunar eclipse is due to
A) refraction of sunsets and sunrises all around Earth.
B) infrared light continually emitted by the Moon.
C) scattering of lower frequencies of light by the Moon.
D) dim light that is incident upon the Moon by Jupiter and other planets.
Answer:
Compared to ultraviolet waves, the frequency of infrared waves is
A) lower.
B) the same.
C) higher.
Answer:
A heavy rock and a light rock of the same size are falling through the air from a tall
building. The one that encounters the greatest air resistance is the
A) light rock.
B) heavy rock.
C) same for both
Answer:
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance
are neglected, the force required to keep the puck sliding at constant velocity is
A) equal to its weight.
B) equal to its weight divided by its mass.
C) equal to its mass times its weight.
D) none of the above
Answer:
Transformers use ac to satisfy the required
A) transfer of energy from coil to coil.
B) voltage for transformation.
C) change in magnetic field for operation.
D) change in input current.
E) magnetic field intensities.
Answer:
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
Answer:
One kilowatt is a unit of
A) energy.
B) power.
C) voltage.
D) current.
E) resistance.
Answer:
In a heat pump, warming is accomplished when
A) condensation occurs in its coils.
B) vaporization occurs in its coils.
C) both of these
D) neither of these
Answer:
Modern automobile headlights are connected in
A) parallel.
B) a perpendicular orientation.
C) series.
D) none of the above
Answer:
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
Answer:
The half-life of carbon 14 is 5730 years. If a 1-gram sample of old carbon is 1/8 as
radioactive as 1-gram of a current sample, then the age of the old sample is about
A) 716 years.
B) 11,500 years.
C) 17,200 years.
D) 22,900 years.
E) 46,000 years.
Answer:
If the primary of a transformer is connected to a dc power source, the transformer
would have a voltage output
A) at a higher efficiency than with an ac source.
B) the same.
C) that is also dc.
D) only while being connected or disconnected.
E) none of the above
Answer:
A common naturally-polarized bit of matter is
A) an electron.
B) a hydrogen atom
C) a water molecule.
D) all of the above
E) none of the above
Answer:
A person is attracted toward the center of Earth by a gravitational force of 500 N. The
force with which Earth is attracted toward the person is
1) 500 N
2) infinitesimally small
3) billions and billions of tons
principally because
4) the forces in question make an action/reaction pair.
5) the mass of the person is negligible compared to the mass of Earth.
6) Earth itself weighs billions and billions of tons.
7) of inertia.
Answer:
The Moon's redness during a lunar eclipse is due to
A) light of lower frequencies reflected from the Moon.
B) excess infrared radiation.
C) an optical illusion.
D) refracted light from Earth's sunrises and sunsets.
E) none of the above
Answer:
The amount of current in an incandescent bulb rated 75W 120V is about
A) 0.4 A.
B) 0.6 A.
C) 1.2 A.
D) more than 1.2 A.
Answer:
Earth's interior is warmed by ________ and Earth's surface is warmed by ________.
A) radioactive processes; fusion in the Sun
B) fission; fossil fuels
C) volcanoes; solar energy
D) terrestrial radiation; terrestrial radiation
Answer:
An object in a vacuum has no
A) buoyant force.
B) mass.
C) weight.
D) temperature.
E) all of the above
Answer:
Which of these has its center of mass where no mass exists?
A) baseball
B) golf ball
C) basketball
D) none of the above
Answer:
Horses with the greatest linear speed on a merry-go-round are located
A) near the center.
B) near the outside.
C) anywhere, because they all move at the same speed.
Answer:
To outside observers at rest, the overall sizes of objects traveling at relativistic speeds
are
A) larger.
B) smaller.
C) the same size.
Answer:
A nucleon has more mass on average when it is
A) inside the nucleus.
B) removed from the nucleus.
C) both the same
Answer:
The beat frequency produced when a 240-hertz tuning fork and a 246-hertz tuning fork
are sounded together is
A) 6 hertz.
B) 12 hertz.
C) 240 hertz.
D) 245 hertz.
E) none of the above
Answer:
Which of these electromagnetic waves have the longest wavelength?
A) radio waves
B) infrared waves
C) X-rays
D) ultraviolet waves
E) light waves
Answer:
The production of interference colors requires
A) a reflecting surface.
B) at least two reflecting surfaces.
C) a medium with a relatively low index of refraction.
D) none of the above
Answer:
Light bends as it
1) passes a massive star,
2) traverses any gravitational field,
3) both of these,
4) none of these,
and when emitted from a massive star, light is
5) red shifted.
6) blue shifted.
7) speeded up.
8) none of these.
Answer:
A baseball is thrown straight upward. At the very top of its trajectory its instantaneous
velocity is zero and its acceleration is
1) zero.
2) 10 m/s2.
3) between zero and 10 m/s2.
4) none of these.
We can better understand this by noting that when it is at its highest point
5) there momentarily is no motion.
6) its rate of change of motion is still 10 m/s2.
7) although its velocity is not changing, its direction is.
Answer:
The diameter of a mercury atom, atomic number 80, compared with the diameter of a
zirconium atom, atomic number 40, is approximately
1) half as large
2) twice as large
3) the same size
because the
4) atomic masses are not appreciably different.
5) greater nuclear charge pulls the orbiting electrons closer.
6) atomic number and atomic diameter are directly proportional to each other.
7) atomic number and atomic diameter are inversely proportional to each other.
Answer:
A floating object displaces its own
1) volume,
2) weight,
3) density,
and a submerged object displaces its own
4) volume.
5) weight.
6) density.
Answer:
A garden hose is held at an angle of 50o. Neglecting air resistance, the water will travel
exactly the same horizontal distance before returning to the same level if the hose is
held at an angle of
1) 40o.
2) 45o.
3) 60o.
For maximum range, the hose should be held at
4) 40o.
5) 45o.
6) 55o.
7) 60o.
Answer:
Figure M-7
The maximum weight that can be held under the conditions illustrated is
1) 104 N.
2) 105 N.
3) 0 N.
4) need more information
It is interesting to note that in this case the piston actually is
5) pushed up by air.
6) pulled up by the vacuum.
Answer:
Figure M-4
A certain force is required to keep a block of wood 1 m beneath the surface of water.
The force required to keep it 2 m deep is
1) zero.
2) the same.
3) twice as much.
4) four times as much.
This is because
6) pressure increases with increased depth.
7) it displaces the same weight of water at any depth.
8) wood floats.
9) surface tension is not present beneath the surface.
Answer:
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.
Answer:
Figure N-11
As the ball rolls from the straight path from A to B its velocity increases and its
acceleration
1) increases,
2) decreases,
3) remains constant,
and as it rolls from B to C its acceleration along the path
4) increases.
5) decreases.
6) remains constant.
Answer:
The property of objects to resist a change in motion is called
1) friction,
2) velocity,
3) inertia,
4) acceleration,
5) gravity,
and it is measured by its
6) speed.
7) velocity.
8) mass.
9) all of these.
Answer:
A vibrating tuning fork causes an identical fork nearby to vibrate. This is called
1) refraction.
2) resonance.
3) beats.
4) reverberation.
For this to occur, both forks must have the same (or multiple)
5) intensities.
6) amplitudes.
7) frequencies.
8) geometries.
9) all of these.
Answer:
You would have the most quantity of gold if it weighed 1 N on the
1) Moon.
2) Earth.
3) planet Jupiter.
4) would be the same on each.
This is because
5) on the Moon a greater mass of gold is required for the gravitational force to equal 1
N.
6) weight and mass are directly proportional to each other.
7) gravitational force per mass is greatest on the most massive planet.
Answer:
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
Answer:
All things being practically equal, if the energy content in gasoline were doubled, then
the distance a car should travel per liter of gasoline should
1) be no different.
2) double.
3) quadruple.
If the low-energy and high-energy fuels are burned in the same time, then compared to
the POWER produced by combustion of the low-energy gasoline, the power produced
by the combustion of the higher-energy gasoline should
4) be no different.
5) double.
6) quadruple.
Answer:
A pinhole cameras has no lens. The tiny pin-hole opening insures that rays of light from
different parts of an object
1) overlap.
2) don't overlap.
3) bend to a focus.
Small openings between leaves in a tree act as pinholes. The round spots of light cast on
the ground below are images of
4) the Sun.
5) the openings themselves.
6) both of these
7) neither of these
Answer:
