While you are standing in the aisle of a bus, the driver suddenly makes a left turn. You
lurch to the right due to
A) an unbalanced force.
B) your tendency to keep moving forward.
C) an equilibrium challenge.
In most cases, which expands more for comparable changes in temperature?
A) solids.
B) liquids.
C) gases.
D) all expand about equally.
After passing through double slits, electrons make a pattern on a screen that
A) shows which slit each electron has passed through.
B) resembles a pattern that waves make.
C) has two peaks of intensity.
D) has a single wide peak of intensity.
Electrons with greater potential energies relative to the atomic nucleus are
A) inner electrons.
B) outer electrons.
C) both the same
To “spear” a blue fish with a red laser beam and compensate for refraction, aim your
laser
A) directly at the sighted fish.
B) above the sighted fish.
C) below the sighted fish.
To estimate the distance in kilometers of a flash of lightning, count the number of
seconds between seeing the flash and hearing the accompanying thunder, then divide by
A) 2.
B) 3.
C) 4.
D) 5.
E) none of the above
Which concept is being illustrated when a tablecloth is quickly yanked beneath dishes
resting on a table?
A) equilibrium
B) friction
C) support force
D) inertia
If a monkey floating in outer space throws his hat away, the hat and the monkey will
both
A) move away from each other, but at different speeds.
B) move away from each other at the same speed.
C) move a short distance and then slow down.
D) move a short distance and then go faster.
E) come to a stop after a few minutes.
The frequency of a note one octave higher in pitch than a 440-Hz note is
A) 1760 Hz.
B) 880 Hz.
C) 440 Hz.
D) 220 Hz.
E) 110 Hz.
A lump of energy associated with light is called a
A) quantum.
B) photon.
C) both of these
D) neither of these
Which of the following continually emits electromagnetic radiation?
A) insects
B) radio antennas
C) red-hot coals
D) all of the above
E) none of the above
A hydraulic press, like an inclined plane, is capable of increasing energy.
A) sometimes true
B) always false
C) always true
D) sometimes false
The measured ratio of circumference to diameter on a disk is π when the disk is
A) moving at relativistic speeds.
B) rapidly rotating.
C) at rest.
D) all of the above
E) none of the above
A freight train rolls along a track with considerable momentum. If it rolls at the same
speed but has twice as much mass, its momentum is
A) zero.
B) twice.
C) four times as much.
D) unchanged.
If a star 100 light-years away explodes, the time for the gravitational waves to reach
Earth is 100 years as measured from
A) any uniformly moving reference frame.
B) any accelerating reference frame.
C) any reference frame, accelerated or not.
D) the reference frame of the waves.
E) Earth.
When a light ray passes at a non-90o angle from water into air, it
A) bends toward the normal.
B) bends away from the normal.
C) travels much slower.
The source of energy that illuminates a lamp in your home is
A) the power company.
B) the electrical outlet.
C) atoms in the bulb filament.
D) the wire leads to the lamp.
E) the source voltage.
Fissioning an iron nucleus would occur with
A) absorption of energy.
B) release of energy.
C) neither absorption nor release of energy
A ball is projected 125 meters straight upward and then falls the same distance back to
its starting point. Neglecting air resistance, its total time in the air is about
A) 5 s.
B) 10 s.
C) 15 s.
D) more than 20 s.
Earth and the Moon are attracted to each other by gravitational force. The more-massive
Earth attracts the less-massive Moon with a force
1) less than the force that Moon exerts on Earth.
2) greater than that of the force that Moon exerts on Earth.
3) the same as that of the force that Moon exerts on Earth.
This is in accord with
4) the law of inertia.
5) Kepler’s Laws.
6) the conservation of energy.
7) the fact that both Moon and Earth orbit about a common point, the center of mass.
8) the law of action and reaction.
The electric power supplied to a lamp that carries 2 A at 120 V is
A) 1/6 watts.
B) 2 watts.
C) 60 watts.
D) 20 watts.
E) 240 watts.
Heat normally flows from objects of high
A) internal energy to objects of low internal energy.
B) temperature to objects of low temperature.
C) both of these
D) neither of these
All waves have in common a
A) pattern.
B) vibrating source.
C) variable regions of high and low pressure.
D) none of the above
An element is changed into a completely different element in
A) radioactive alpha decay.
B) radioactive beta decay.
C) nuclear fission.
D) nuclear fusion.
E) all of the above
For a pair of Polaroids with axes at 45 degrees to each other
A) light will not pass.
B) light that passes is dimmer than for a parallel orientation.
C) another Polaroid is necessary for any light to pass.
Which requires the most amount of work by the brakes of a car?
A) slowing down from 100 km/h to 70 km/h
B) slowing down from 70 km/h to a stop
C) equal amounts for both
A golf ball is thrown at and bounces backward from a massive bowling ball that is
initially at rest. After the collision, compared to the golf ball, the bowling ball has more
A) momentum, but less kinetic energy.
B) kinetic energy, but less momentum.
C) momentum and more kinetic energy.
D) need more information
A friend says that changing electric and magnetic fields underlie the production of light.
A) agree with your friend
B) argue to the contrary with your friend.
C) find a new friend.
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
Room temperature on the Kelvin scale is about
A) 100 K.
B) 200 K.
C) 300 K.
D) 400 K.
E) more than 400 K.
We don’t hear the squeaks of bats because their sound is
A) of ultra-high frequencies.
B) of ultra-high loudness.
C) both of these
D) neither of these