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When a parcel of air expands against the environment and no heat enters or leaves, its
temperature
A) increases.
B) decreases.
C) remains unchanged.
Wobbles in the path of Uranus led to the discovery of
A) Jupiter.
B) Mars.
C) Neptune.
D) all of the above
E) none of the above
An astronaut traveling forward at 0.87c holds a meterstick in spear-like fashion. An
observer at rest sees the spear's length as
A) 0.5 m.
B) 0.87 m.
C) 1 m.
D) 1.25 m.
E) 1.5 m.
In which case would you have the largest mass of gold? If your chunk of gold weighed
1 N on the
A) Moon.
B) Earth.
C) planet Jupiter.
Compared with falling on a stone floor, a wine glass may not break when it falls on a
carpeted floor because the
A) carpeted floor provides a smaller impulse.
B) stopping time is shorter on the carpet.
C) stopping time is longer on the carpet.
D) carpet provides a smaller impulse and a longer time.
Airplane flight best illustrates
A) Archimedes' principle.
B) Pascal's principle.
C) Bernoulli's principle.
D) Boyle's law.
Inside a freely-falling elevator, you would have no
A) gravitational force on you.
B) weight.
C) both of these
D) neither of these
Glowing plasma is evident in the light from
A) a fluorescent lamp.
B) the aurora borealis (northern lights).
C) some TV screens.
D) all the above
E) none of the above
If the speed of a motor scooter doubles, which of the following also doubles?
A) momentum
B) kinetic energy
C) acceleration
D) all of the above
The brightness of a lamp is directly related to its
A) brand.
B) place of manufacture.
C) power rating.
D) all of the above
E) none of the above
At one instant an object in free fall is moving downward at 50 m/s. One second later its
speed is
A) 25 m/s.
B) 50 m/s.
C) 55 m/s.
D) 60 m/s.
E) 100 m/s.
The amount of current in an LED bulb rated 10.5W 120V is
A) less than 1 A.
B) about 1 A.
C) more then 1 A.
Lobsters live on the bottom of the ocean, which means their density is
A) greater than the density of sea water.
B) equal to the density of sea water.
C) less than the density of sea water.
A radiation detector measures radioactivity decay of a piece of radium by catching and
counting alpha particles it emits. Making this measurement affects the
A) radiation rate of the piece of radium.
B) alpha particles that are caught and counted.
C) both of these
D) neither of these
Two spaceships approaching each other move at very close to the speed of light, each
sending a beam of light to the other. Each measures the speed of light from the other
spaceship as
A) slightly less than c.
B) c.
C) slightly greater than c.
D) much greater than c.
The bob of a simple pendulum has its maximum kinetic energy at the
A) top of its swing.
B) bottom of its swing.
C) midpoint between top and bottom.
D) at all points along its path of swing.
If a material is heated until it is green hot, then
A) it would liquefy immediately.
B) it would be hotter than white hot.
C) its molecules would be vibrating at nearly identical rates.
D) it would be a strong absorber of red light.
E) energy conservation would be violated.
Which of the following bodies is comprised mostly of plasma?
A) Earth
B) Moon
C) Sun
D) all of the above
E) none of the above
Magnetic compasses reportedly were first used for navigation by
A) Aristotle.
B) Australian aborigines.
C) Chinese sailors.
D) none of the above
Planets would crash into the Sun if it weren't for
A) their tangential velocities.
B) their vast distances from the Sun.
C) the inverse-square law.
D) their relatively small masses.
E) the fact that they are beyond the main gravitation of the Sun.
When you run along the hall from one classroom to another you're moving through
A) space.
B) time.
C) both of these
D) none of these
The type of radio wave that produces the least static in a radio receiver is
A) AM.
B) FM.
C) neither of these
The main difference between the retina of a human eye and that of a dog's eye is the
A) predominance of cones in a dog's retina.
B) absence of cones in a dog's retina.
C) more intricate optic nerve in a human's eye.
D) small number of cones in a human's eye.
E) none of the above
According to the principle of continuity, the velocity of a fluid multiplied by the cross
section through which it flows at one point will equal the product of
A) velocity and cross section at another point.
B) velocity and pressure at another point.
C) a constraint factor.
D) none of the above
One neutron added to a helium nucleus results in
A) hydrogen.
B) boron.
C) lithium.
D) beryllium.
E) helium.
If the frequency of blinks for a light source appears to double as the light source
approaches you, the frequency of blinks as it moves away from you at the same speed
A) is halved.
B) is doubled.
C) stays the same.
Your hand is warmed when you blow on it with your mouth open, but when your lips
are puckered so that air expands as you blow, your hand is
A) warmer still.
B) cooler.
C) neither warmer nor cooler.
A player hits a ball with a bat. If action is the force of the bat against the ball, reaction is
the
A) air resistance on the ball.
B) weight of the ball.
C) force that the ball exerts on the bat.
D) grip of the player's hand against the ball.
E) weight of the bat.
Chromatic aberration is a consequence of different colors in a lens having different
A) aberrations.
B) frequencies.
C) energies.
D) critical angles.
E) speeds.
Polaroid sunglasses reduce much glare by polarization axes that are
A) vertical.
B) horizontal.
C) at right angles to each other.
