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An asteroid exerts a 360-N gravitational force on a nearby spacecraft. The 360-N force
on the spacecraft is directed
A) toward the asteroid.
B) away from the asteroid.
C) toward the Sun.
A jet traveling at 1500 km/h passes overhead. The sonic boom produced is heard by
A) a listener on the ground.
B) the jet pilot.
C) both of these
D) neither of these
Control is maintained in a nuclear reactor by control rods that
A) absorb excess neutrons.
B) emit fast neutrons.
C) both of these
D) neither of these
X-rays may be correctly regarded as
A) high frequency sound waves.
B) high frequency radio waves.
C) both of these
D) none of these
The human body can withstand an acceleration of 10 g under certain conditions. What
net force would produce this acceleration for a 50-kg person?
A) 500 N
B) 2500 N
C) 5000 N
D) 25,000 N
E) none of the above
A photosensitive surface is illuminated with both blue and violet light. The light that
causes the greater number of ejected electrons is
A) blue light.
B) violet light.
C) both eject equal numbers.
D) need more information
The contained air in a closed, sealed can placed on a hot stove will undergo an increase
in
A) internal energy.
B) temperature.
C) pressure.
D) all of the above
E) none of the above
The F in FM radio stands for
A) frequency.
B) forced vibration at which resonance occurs.
C) foul.
D) female.
E) fax.
If you place a pipe over the end of a wrench when trying to rotate a stubborn bolt,
effectively making the wrench handle twice as long, you'll multiply the torque by
A) two.
B) four.
C) eight.
An adiabatic process is characterized by the absence of
A) entropy.
B) pressure change.
C) heat exchange.
D) temperature change.
E) none of the above
In order for an atom to decay to an element that is one greater in atomic number, it can
emit
A) one alpha particle and 3 beta particles.
B) one positron and 2 beta particles.
C) one beta particle.
D) all of the above
E) none of the above
A spaceship traveling very fast relative to you fires a stream of photons at speedc away
from you. You measure the photons' speed to be
A) less than c.
B) more than c.
C) equal to c.
Every equation in physics reminds us of a lesson: we can never change only one thing.
When we change the composition of the atmosphere we likely also change
A) its transparency.
B) its reflectivity.
C) its average temperature.
D) Earth's climate.
E) all of the above
If light in a spectroscope passed through round holes instead of slits, spectral lines
would appear
A) as thicker lines.
B) round.
C) dimmer.
An explosion occurs 34 km away. The time it takes for its sound to reach your ears,
traveling at 340 m/s, is
A) 0.1 s.
B) 1 s.
C) 10 s.
D) 20 s.
E) more than 20 s.
A postulate of special relativity is that the speed of light
A) like all motion, is relative.
B) for all observers is a constant.
C) both of these
D) neither of these
Imagine a single charge q placed at one corner of a square, and that the electric field at
the center of the square is F/q. If two other equal charges are placed at the adjacent
corners of the square (leaving the opposite corner "blank"), the electric field at the
center of the square is
A) F/q.
B) 4F/q.
C) F/(2q).
D) F/(4q).
E) none of the above
If you toss a ball "horizontally" from one wall to an opposite wall inside an accelerating
spaceship in deep space, defining "up" as the direction of acceleration, the ball will hit
A) below its straight-line path.
B) above its straight-line path.
C) neither of these
A 1-centimeter cubed sugar cube scaled up by a factor of 10 has a total surface area of
A) 60 cm2.
B) 600 cm2.
C) 6000 cm2.
D) none of the above
A quantity of water has more entropy when it is
A) frozen ice.
B) boiling.
C) at room temperature.
You can add heat without raising temperature to
A) ice.
B) boiling water.
C) both of these
D) neither of these
If the Sun were to disappear at this moment, we wouldn't know about it for
A) 7 seconds, reflex time.
B) 8 seconds.
C) 8 minutes.
D) 8 hours.
According to the principle of equivalence, observations made of falling objects at
Galileo's Leaning Tower of Pisa are indistinguishable from observations made in
A) a spaceship orbiting in a gravitational field.
B) a spaceship accelerating at g in deep space.
C) any uniformly moving reference frame.
D) all of the above
E) none of the above
A pot that falls from a ledge and hits the ground 45 m below hits the ground at
A) 30 m/s.
B) 60 m/s.
C) 120 m/s.
D) more than 120 m/s.
A granite block is mostly empty space because the atoms in the granite are
A) in perpetual motion.
B) mostly empty space themselves.
C) held together by electrical forces.
D) not as close together as they could be.
E) invisible.
Which has more energy per photon?
A) red light
B) blue light
C) both the same
What is the wave speed of a wave traveling an average distance of 6 meters in one
second?
A) less than 0.2 m/s
B) 1 m/s
C) 3 m/s
D) 6 m/s
E) more than 6 m/s
A falling 1-N apple hits the ground with a force of about
A) 1 N.
B) 2 N.
C) 4 N.
D) 10 N.
E) need more information
To produce an acceleration to a system there
A) must be a net force on the system.
B) may or may not be a net force on the system.
C) must be acceleration outside the system also.
As the sloped surface supporting a shoe becomes steeper
A) the shoe's weight mg remains unchanged.
B) the normal force becomes less.
C) friction needed to keep it at rest increases.
D) all of the above
E) none of the above
