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When Burl and Paul stand on opposite ends of a sign-painting scaffold, the tensions in
the supporting ropes
A) are equal.
B) depend on the relative weights of Burl and Paul.
C) combine to equal zero.
D) are in equilibrium.
A piece of putty moving with 1 unit of momentum strikes and sticks to a heavy bowling
ball that is initially at rest. Both move with a combined momentum of
A) less than 1 unit.
B) more than 1 unit.
C) 1 unit.
D) need more information
Galileo's use of inclined planes allowed him to effectively
A) slow down the ball's changes in speed.
B) reduce the time of the ball's changes in speed.
C) eliminate all changes in speed.
D) eliminate friction.
In photoelectric emission, the work function is the minimum
A) frequency of light to produce emission.
B) energy required to eject an electron from the surface.
C) energy an emitted electron possesses.
D) none of the above
In the formation of a cloud, moist air rises and
A) expands.
B) cools.
C) condenses.
D) all of the above
E) none of the above
The phenomenon easily explained only in terms of the particle model of light is
A) reflection.
B) refraction.
C) photoelectric effect.
D) diffraction.
E) none of the above
A parallelogram is a four-sided figure with opposite sides that are
A) equal.
B) parallel.
C) at right angles.
D) none of the above
The direction of an electric field is the direction of the force exerted on
A) a neutral test charge.
B) an electron.
C) an atom.
D) a proton.
E) a molecule.
A bullet fired horizontally from a rifle begins to fall
A) as soon as it leaves the barrel.
B) after air friction reduces its speed.
C) neither of these
Internal energy in thermodynamics is the same as
A) temperature.
B) thermal energy.
C) heat.
D) all of the above
The number of nodes, including the end points, in a standing wave that is three
wavelengths long is
A) 4.
B) 5.
C) 6.
D) 7.
E) none of the above
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.
Electrons flow in a wire when there is
A) an imbalance of charges in the wire.
B) a potential difference across its ends.
C) a difference in potential energy across its ends.
D) none of the above
According to de Broglie, constructive interference occurs when an orbiting wave
A) reinforces itself
B) doesn't reinforce itself.
C) neither of these
The volume of matter is due mostly to its
A) protons.
B) electrons.
C) both of these
The radiation source closest to us originates in
A) medical treatments.
B) all kinds of power plants.
C) our own bodies.
D) none of the above
The exhaust product from a hydrogen fuel cell is
A) carbon dioxide.
B) methane.
C) pure water.
D) nitric acid.
The vibrational direction of an electron and the plane of polarization of the light it emits
A) are the same.
B) are at right angles to each other.
C) may or may not be at right angles to each other.
D) are independent of each other.
An Earth satellite is simply a projectile
A) freely falling around Earth.
B) floating motionless in space near Earth.
C) approaching Earth from outer space.
Interference colors in a soap bubble is evidence that the soap film
A) has two reflecting surfaces.
B) is thin.
C) both of these
D) neither of these
In the field induction credited to Maxwell, wires
A) can be insulated or non-insulated.
B) are minimized.
C) are not needed.
To a fair approximation, Early Greeks knew the
A) size of Earth.
B) size of the Moon.
C) Earth-Moon distance.
D) all of the above
The air in your classroom has
A) mass.
B) weight.
C) energy.
D) all of the above
E) none of the above
Comparing the light from a glowing tube of neon gas and the beam of a helium-neon
laser, there is a greater number of spectral lines in light from the
A) neon gas tube.
B) laser beam.
C) both about the same
Buoyant force is greater on a submerged 10-newton block of
A) lead.
B) aluminum.
C) same on each
Danny Diver weighs 500 N and steps off a diving board 10 m above the water. Danny
hits the water with kinetic energy of
A) 10 J.
B) 500 J.
C) 510 J.
D) 5000 J.
E) more than 5000 J.
Acceleration due to gravity on the Moon is less than on Earth, and the Moon is smaller
than Earth. This means that compared to an Earth satellite, a satellite in close orbit
about the Moon would travel
A) slower.
B) faster.
C) the same.
D) need more information
In casually observing a cup of tea you are
A) affecting its temperature.
B) affecting its location.
C) both of these
D) neither of these
A main difference between a radio wave and a light wave is
A) wavelength.
B) frequency.
C) both of these
D) neither of these
When you're ready for the hottest sips of coffee, add cream
A) right away.
B) at any time.
C) when you are ready to drink the coffee.
Tides caused mainly by the Moon occur in Earth's
A) oceans.
B) atmosphere.
C) interior.
D) all of the above
Your image in a plane mirror is
A) virtual.
B) real.
C) both of these
D) neither of these
