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The force of gravity does work on a satellite when it is in
A) circular orbit.
B) elliptical orbit.
C) both of these
D) neither of these
When an electron and a positron meet and annihilate, the mass-energy of the particles is
carried away by
A) a gamma ray.
B) two gamma rays, otherwise momentum wouldn't be conserved.
C) nothing at all, gone.
In both fission of uranium and fusion of hydrogen, mass
A) decreases.
B) remains constant.
C) increases.
A blue shift for light indicates that the light source is moving
A) toward you.
B) away from you.
C) both of these
D) neither of these
To weaken a bar magnet
A) drop it on a hard surface.
B) put it in hot flames.
C) whack it with a hammer.
D) all of the above
E) none of the above
A bird flying at 8 km/h in a 6-km/h crosswind has a resultant speed of
A) 6 km/h.
B) 8 km/h.
C) 10 km/h.
D) 14 km/h.
If you double the frequency of a vibrating object, its period
A) doubles.
B) halves.
C) is quartered.
Stand a broom upright on the end of its pole and let it topple to the floor. Repeat, but
with the bristles end on the floor. The faster fall will be the broom standing on its
A) pole-end.
B) bristles-end.
C) the same either way
When water vapor condenses on the inside of a window, the room becomes slightly
A) warmer.
B) cooler.
C) both of these
D) neither of these
Red-hot and blue-hot stars appear white to the eye because
A) the eye has difficulty seeing color at night.
B) they are too dim to fire the cones.
C) they are too dim to fire the rods.
D) they are overwhelmed by the blackness of the nighttime sky.
E) eye receptivity peaks in the yellow-green part of the spectrum.
Assuming all the atoms exhaled by Julius Caesar in his last dying breath are still in the
atmosphere, we breathe in at least one of them each
A) single breath.
B) day.
C) month.
D) ten years.
E) can't say for some people breathe a few of Caesar's atoms daily, while others never.
Magenta light is a mixture of
A) red and blue light.
B) red and cyan light.
C) red and yellow light.
D) yellow and green light.
E) none of the above
In our part of the universe, antimatter is
A) non-existent.
B) plentiful.
C) short-lived.
D) long-lived.
Molecules in a region of expanding air more often collide with neighboring molecules
that are
A) approaching.
B) receding.
C) nearly out of range.
An efficient step-up transformer boosts
A) energy.
B) power.
C) voltage.
D) all of the above
E) none of the above
A fish above the surface of water will see better in air if it has goggles that are
A) tinted blue.
B) hemispherical.
C) filled with water.
D) extremely shiny.
E) none of the above
The force that acts between a pair of electrically-charged particles depends on
A) magnitude of charge.
B) separation distance.
C) both of these
D) neither of these
A problem with the Bohr model of the atom is that electrons circling the nucleus
A) accelerate and should continuously emit radiation.
B) lose energy and should spiral into the nucleus.
C) both of these
D) neither of these
The frequencies needed to reproduce high-quality sounds are
A) within the range of hearing.
B) beyond the range of hearing.
C) centered about 2000 hertz.
D) none of the above
The function of graphite in the first atomic reactor was to
A) slow fast neutrons.
B) emit fast neutrons.
C) moderate uranium isotopes.
D) none of the above
A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. What
is the deceleration of the car?
A) 110 m/s2
B) 220 m/s2
C) 800 m/s2
D) 880 m/s2
E) need more information
The fastest moving planet in a solar system is the
A) smallest planet.
B) most massive planet.
C) planet nearest the Sun.
D) planet farthest from the Sun.
E) all move at the same speed.
A good absorber of radiation is a
A) good emitter of radiation.
B) poor emitter of radiation.
C) good reflector.
D) none of the above
A same-size iron ball and wooden ball are dropped simultaneously from a tower and
reach the ground at the same time. The iron ball has a greater
A) speed.
B) acceleration.
C) momentum.
D) all of the above
E) none of the above
Two charged particles repel each other with a force F. If the charge of one of the
particles is doubled and the distance between them is halved, then the force will be
A) F.
B) 2 F.
C) F/2.
D) F/4.
E) none of the above
The least energy required to produce forced vibration in an object occurs
A) below its natural frequency.
B) at its natural frequency.
C) above its natural frequency.
D) none of the above
Which of the following statements is true?
A) a molecule is the smallest existing particle
B) chemical elements are made up of about 100 distinct molecules
C) molecules form atoms that determine chemical properties of a substance
D) molecules are the smallest subdivision of matter that still retain a substance's
chemical properties
E) none of the above
An element is distinct because of its number of
A) protons.
B) neutrons.
C) electrons.
D) the total mass of all the particles.
E) none of the above
Light emitted by the Sun is
A) polarized.
B) nonpolarized.
C) sometimes polarized.
Brownian motion is caused by
A) thermal agitation.
B) perpetual motion.
C) particles larger than atoms bumping into them.
D) interactions between atoms and molecules.
E) almost invisible bugs.
Compared with the energy produced by fissioning a gram of uranium, the energy
produced by fusing a gram of deuterium is
A) more.
B) less.
C) the same.
Double the frequency of musical note and you double its
A) wavelength.
B) speed.
C) amplitude.
D) all of the above
E) none of the above
Newton hypothesized that the forces acting on planets was
A) along their directions of travel.
B) perpendicular to their directions of travel.
C) toward the Sun.
D) none of the above
