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Phil leans over the edge of a cliff and throws a rock upward at 5 m/s. How far below the
level from which it was thrown is the rock 2 seconds later?
A) 5 m
B) 10 m
C) 15 m
D) 20 m
The greater efficiency achieved with the curved blades of a Pelton wheel is due to
A) bouncing.
B) greater time of water impact.
C) rotational momentum.
D) divided impulse.
Which will melt more ice when placed on its surface, a kilogram of wood or a kilogram
of iron of the same high temperature?
A) 1 kg of wood.
B) 1 kg of iron.
C) both the same
D) neither of these
A ring and a disk both at rest roll down a hill together. Which rolls slower?
A) ring
B) disk
C) depends on the masses
D) both roll at the same speed
E) need more information
If a pencil's length and diameter are both multiplied by 10, then its volume is multiplied
by
A) 10.
B) 100.
C) 1000.
D) 10,000.
E) none of the above
The place from which motion is observed and measured is called
A) a frame of reference.
B) a starting point.
C) an initial location.
The tarp covering on a trailer or truck puffs upward for fast-moving vehicles, which
illustrates
A) Pascal's principle.
B) Archimedes' principle.
C) the principle of continuity.
D) Bernoulli's principle.
The cause of electrical shock is predominantly
A) excess current.
B) excess voltage.
C) reduced resistance.
D) none of the above
When the air of a fully-inflated party balloon quickly escapes, its temperature
A) drops.
B) rises.
C) remains unchanged.
D) none of the above
The disadvantages to fission power plants include
A) radioactive waste disposal.
B) production of plutonium for possible weapons proliferation.
C) risk of accidental release of radioactivity.
D) all of the above
E) none of the above
According to Heisenberg's uncertainty principle, the more we know about a particle's
momentum, the less we know about its
A) kinetic energy.
B) mass.
C) speed.
D) location.
E) none of the above
Which experiment best illustrates the particle-like nature of light?
A) photoelectric effect
B) double-slit experiment
C) both of these
D) neither of these
Compared with a neutron bouncing off a carbon nucleus, a neutron bouncing off an iron
nucleus loses
A) less speed.
B) more speed.
C) the same amount of speed.
The beam in a cathode-ray tube is composed of
A) photons.
B) electrons.
C) both of these
D) neither of these
A cannonball has more kinetic energy than the recoiling cannon from which it is fired
because the force on the ball
A) is more concentrated.
B) meets less resistance than the cannon on the ground.
C) acts over a longer distance.
To multiply an applied force while using a simple hydraulic lift, your force should be
applied to the
A) large-diameter piston.
B) small-diameter piston.
C) relative piston sizes don't matter.
A less intense sonic boom at ground level can occur if the aircraft
A) is smaller.
B) flies higher.
C) is more streamlined.
D) all of the above
E) none of the above
Heat a copper wire and its electric resistance
A) decreases.
B) remains unchanged.
C) increases.
If the Sun were twice as massive
A) its pull on Earth would double.
B) the pull of Earth on the Sun would double.
C) both of these
D) neither of these
How long a tuning fork vibrates when its handle is held against a table is most related to
A) its frequency.
B) resonance.
C) the conservation of energy.
D) the length of its prongs.
What occurs in a pan of water placed outdoors on a warm day?
A) evaporation
B) condensation
C) both of these
D) neither of these
Escape speed from the Moon is
A) about the same as from Earth.
B) much greater than from Earth.
C) much less than from Earth.
When a falling object has reached its terminal velocity, its acceleration is
A) zero.
B) g.
C) constant.
The total time it takes a projectile fired straight up at 10 m/s to reach the top of its path
and return to its starting point is about
A) 1 s.
B) 2 s.
C) 10 s.
D) 20 s.
Impulse involves the time that a force acts, whereas work involves the
A) distance that a force acts.
B) time and distance that a force acts.
C) acceleration that a force produces.
During a lightning strike you don't want to be inside a building framed with
A) steel.
B) iron.
C) aluminum.
D) wood.
Neglecting air resistance, a ball projected straight upward so it remains in the air for 10
seconds needs an initial speed of
A) 50 m/s.
B) 60 m/s.
C) 80 m/s.
D) 100 m/s.
E) 110 m/s.
The surface of hot water has a relatively high rate of
A) evaporation.
B) condensation.
C) conductivity.
D) convection.
Radioactive muons formed high in the atmosphere have an average lifetime of 2
millionths of a second and travel toward Earth at nearly the speed of light. Because of
their altitude most of them should have decayed by the time they reach the Earth's
surface, according to pre-relativity physics. They don't because they
A) live longer due to time dilation.
B) travel a shorter distance due to length contraction.
C) both of these
D) neither of these
Compared to the atoms that make up the body of an elderly person, the atoms that make
up the body of a newborn baby are
A) newer.
B) actually older.
C) the same age.
