Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
One side of the Moon continually facing Earth is
A) a passing phenomenon.
B) a cosmic coincidence.
C) tidal lock.
To change mercury into gold, a pair of protons must be
A) removed from the mercury nucleus.
B) added to the mercury nucleus.
C) either of these
D) neither of these
Atoms can be excited by
A) thermal agitation.
B) electron impact.
C) photon impact.
D) all of the above
E) none of the above
Spots of sunlight on the ground cast through openings between leaves in trees above are
actually
A) images of the Sun.
B) part of a solar eclipse.
C) due to refraction of sunlight.
D) all of the above
A heavy ball hangs by a string, with a second string attached to its bottom. A slow pull
on the bottom string breaks the
A) top string.
B) bottom string.
C) top or bottom string equally.
Harry places a new air conditioner in the middle of his hot room, which when operating
A) cools the room.
B) further warms the room.
C) neither of these
The attraction between unlike substances is called
A) adhesion.
B) cohesion.
C) depends on the substances.
You can safely stand on the overhanging end of a heavy plank that rests on a table. How
much overhang depends on your mass and the plank's mass. If you can stand on the end
of a plank that overhangs the edge of the supporting table 1/4 its total length, how
massive is the plank compared to your mass?
A) 1/2
B) the same
C) 1 and 1/2 times
D) twice
E) 4 times
The shortest distance between two points on a curved surface is a
A) straight line.
B) geodesic.
C) neither of these
When a cannonball is fired from a cannon, which undergoes the greater acceleration?
A) the cannonball
B) the recoiling cannon
C) both the same
A shock wave is
A) the opposite of a bow wave.
B) usually composed of a pair of closely spaced cones.
C) weak for aircraft that fly at less than the speed of sound.
D) all of the above
E) none of the above
A light source blinks once per second in its own frame of reference. As you approach
the blinking source, you observe the frequency of blinks to be
A) less than 1 Hz.
B) 1 Hz.
C) more than 1 Hz.
Disregarding the effects of friction, a cyclist will coast farther when a lamp powered by
a wheel generator is
A) of low wattage.
B) of high wattage.
C) turned off.
D) none of the above
Chromatic aberration is a consequence of different colors in a lens having different
A) aberrations.
B) frequencies.
C) energies.
D) critical angles.
E) speeds.
Most of the mass of material that makes up a plasma is
A) electrically neutral.
B) always positively charged.
C) always negatively charged.
Centrifugal forces are an apparent reality to observers in a reference frame that is
A) moving at constant velocity.
B) an inertial reference frame.
C) at rest.
D) rotating.
E) none of the above
The scientific method is most effective in
A) making hypotheses.
B) gaining, organizing, and applying new knowledge.
C) discovering new things.
D) making theories.
E) performing experiments.
A cannonball following a parabolic path explodes into fragments. The momentum of
the fragments
A) continue along the path as if the explosion didn't occur.
B) cancels to zero by vector addition.
C) both of these
D) neither of these
Suzie Skydiver jumps from a high-flying plane. As her velocity of fall increases, her
acceleration
A) increases.
B) decreases.
C) remains unchanged regardless of air resistance.
The force due to gravity that acts on a block of ice that slides down an icy ramp
A) remains equal to mg at all angles.
B) decreases as the slope of the ramp increases.
C) becomes greatest when the ramp is vertical.
Alpha particles and beta particles are deflected by a magnetic field in
A) opposite directions.
B) perpendicular directions to each other.
C) the same direction.
Suspend your body from a pair of vertical ropes and the tension in each rope will be
A) half your weight.
B) equal to your weight.
C) greater than your weight.
D) none of the above
Stephanie dips a glass rod into vegetable oil. The submerged part of the rod can't be
seen because
A) refraction is unbent before light gets to your eye.
B) both the oil and glass have the same index of refraction.
C) of internal reflection.
D) light has different speeds in the oil and glass.
As a ball falls, the action force is the Earth's pull on the ball. The reaction force is the
A) air resistance acting against the ball.
B) acceleration of the ball.
C) ball's pull on Earth.
D) none of the above
A person who sees more clearly under water without eyeglasses or a facemask is
A) nearsighted.
B) farsighted.
C) neither of these
Which of these does NOT have an electrical charge?
A) proton
B) electron
C) neutron
D) all of the above
E) none of the above
When condensation occurs inside your bedroom window, the air outside is appreciably
A) colder.
B) warmer.
C) both of these
D) neither of these
A moving van with a stone lightly glued to the midpoint of its ceiling smoothly moves
at constant velocity. When the glue gives way, the stone falls and hits the floor
A) ahead of the midpoint of the ceiling.
B) exactly below the midpoint of the ceiling.
C) behind the midpoint of the ceiling.
D) none of the above
A temperature inversion occurs when the upper layers of air are
A) warmer than the lower regions of air.
B) cooler than the lower regions of air.
C) at the same temperature as lower regions of air.
The physics underlying photovoltaic solar cells is
A) electron diffraction.
B) photon capture.
C) the photoelectric effect.
D) none of the above
Which has the greater mass?
A) a king-size pillow
B) an automobile battery
C) both the same
There are about as many atoms of air in our lungs at any moment as there are breaths of
air in the atmosphere of
1) a large auditorium.
2) a large city.
3) North America.
4) the whole world.
If all the atoms exhaled by Isaac Newton in his last dying breath are still in the
atmosphere, then we breathe about one of those atoms with each
5) single breath.
6) day of breathing.
7) month of breathing.
8) year of breathing.
9) none, for some people may inhale Newton's atoms occasionally while others may
take years.
Kids in elementary school get this right: Which color of light gets through red glass?
A) red
B) cyan
C) none of these
When a colored light in air shines on water and is refracted, its wavelength
A) shortens.
B) remains unchanged.
C) lengthens.
When the frequency of light matches the natural frequency of molecules in a material,
light is
A) absorbed.
B) transmitted.
C) reflected.
D) none of the above
