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As a block of ice at 0oC melts, the block absorbs energy
A) and decreases in temperature.
B) and increases in temperature.
C) without a temperature change.
D) all of the above
E) none of the above
An asteroid exerts a 360-N gravitational force on a nearby spacecraft. If the spacecraft
moves to a position three times as far from the center of the asteroid, the force will be
A) zero.
B) 40 N.
C) 120 N.
D) 360 N.
E) 1080 N.
A measuring stick on a rapidly rotating disk will not appear to shrink if it is oriented
along the
A) circumference.
B) radius.
C) either of these
D) neither of these
A large ice cube containing an iron railroad spike floats in a brim-full container of
water. When the ice cube melts,
A) water spills over.
B) no change in water level occurs.
C) water level in the container drops.
What approximate weight of air is in a column 1-cm2 in cross section that extends from
sea level to the top of the atmosphere?
A) 0.01 N
B) 10 N
C) 100 N
D) 1000 N
The first to be credited for assigning the terms positive and negative to electricity was
A) William Crookes.
B) J.J. Thomson.
C) Robert Millikan.
D) Benjamin Franklin.
E) none of the above
The lamp most similar to the common fluorescent lamp is the
A) LED.
B) CFL.
C) incandescent lamp.
D) none of the above
Which interacts more with high-frequency sounds?
A) large bells
B) small bells
C) both the same
The force a magnetic field exerts on a current-carrying wire is maximum when the wire
is oriented
A) parallel to the magnetic field.
B) perpendicular to the magnetic field.
C) either of these
D) neither of these
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
Whether a truck comes to a stop by crashing into a haystack or a brick wall, the
stopping force is
A) greater with the haystack.
B) greater with the brick wall.
C) both the same
Two factors that greatly affect air resistance on falling objects are frontal area and
A) mass.
B) weight.
C) speed.
The most harmful radiations are those that
A) kill living cells.
B) damage living cells.
C) don't encounter cells.
When a hot object makes thermal contact with a cold object, the direction of
A) temperature is from hot to cold.
B) internal energy flow is from hot to cold
C) both of these
D) neither of these
If a child swinging to and fro on a playground swing stands up, her time for a to-and-fro
swing is
A) longer.
B) shorter.
C) unchanged.
Solar power is used in many parts of the world for
A) heating water.
B) generating electricity.
C) both of these
D) neither of these
Colors seen when gasoline forms a thin film on water illustrate
A) refraction.
B) reflection.
C) dispersion.
D) polarization.
E) interference.
When you weigh yourself on a bathroom scale on a slight incline instead of a level
surface, your weight reading on the scale will be
A) less.
B) no different.
C) more.
Einstein rejected the classical idea that space and time are
A) two parts of a whole.
B) connected to each other.
C) independent of each other.
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.
The origin of most internal energy in Earth's interior is
A) the Sun.
B) radioactivity.
C) volcanoes.
D) none of the above
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.
If you wish to keep chicken warm in a shed on a cold night, the best lamp to use is
A) an incandescent lamp.
B) a fluorescent lamp.
C) an LED lamp.
D) a CFL lamp.
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
A ball rolling down an incline has its maximum potential energy at
A) the top.
B) a quarter of the way down.
C) halfway down.
D) the bottom.
The average speed of a horse that gallops 10 kilometers in 30 minutes is
A) 15 km/h.
B) 20 km/h.
C) 30 km/h.
D) 40 km/h.
The concept of pressure involves both
A) force and volume.
B) force and area.
C) area and volume.
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
The natural frequency of an object depends on its
A) size.
B) shape.
C) elasticity.
D) all of the above
E) none of the above
Jogging Jake runs at 4 m/s along a train flatcar that moves at 10 m/s in the opposite
direction. Jake's speed relative to the ground is
A) 6 m/s.
B) 10 m/s.
C) 14 m/s.
D) none of the above
The element gold contains
A) gold atoms.
B) atoms that combine to produce gold.
C) gold atoms plus various slightly lighter and heavier atoms.
D) none of the above
The fact that the weight of a brim-full container of water is unchanged whether or not
something floats in it is nicely employed in
A) hydraulic devices.
B) all floating devices.
C) Scotland's Falkirk Wheel.
D) none of the above
When steam condenses, the surrounding air is
A) cooled.
B) warmed.
C) both of these
D) neither of these
In placing a cool thermometer into a hot cup of tea you likely are
A) affecting its temperature.
B) draining energy from the tea.
C) both of these
D) neither of these
