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Which geometrical shape has the least surface area for a given volume?
A) cube
B) pyramid
C) cylinder
D) sphere
E) none of the above
Which man exerts greater pressure against the floor?
1) a 150-kg man lying on the floor
2) a 150-kg man standing on the floor
3) Both men exert the same pressure.
The reason is that
4) both men have the same weight.
5) the upright man's weight is distributed over a smaller area.
6) the man lying down has his weight equally distributed.
To say that one wave is out of phase with another is to say that the waves are
A) of different amplitudes.
B) of different frequencies.
C) of different wavelengths.
D) out of step.
E) all of the above
The discreteness of orbits of electrons in an atom are due to
A) wave interference.
B) momentum conservation.
C) electric charge quanta
D) all the above
E) none of the above
According to Heisenberg's uncertainty principle, the more we know about a particle's
momentum, the less we know about its
A) kinetic energy.
B) mass.
C) speed.
D) location.
E) none of the above
A chain reaction progresses when the average number of liberated neutrons that cause
further fissions is
A) zero.
B) less than one.
C) one or more.
D) none of the above
The solar constant is the
A) input of solar energy per square meter atop Earth's atmosphere.
B) difference between solar energy atop the atmosphere and that reaching ground.
C) maximum amount of energy Earth receives from the Sun.
A device that transforms electrical energy to mechanical energy is a
A) generator.
B) motor.
C) transformer.
D) magnet.
E) none of the above
The main purpose of the condenser in the steam cycle of a steam turbine is to
A) cool the steam.
B) condense the steam.
C) lower pressure on the back side of the turbine blades.
D) maintain high efficiency.
E) change mechanical energy to electricity.
A cart changes its speed from 90 m/s to 100 m/s in 10 seconds. During this interval its
acceleration is
A) zero.
B) 1 m/s2.
C) 10 m/s2.
D) none of the above
The net force on any object in equilibrium is
A) zero.
B) equal to its weight.
C) less than its weight.
D) non-zero when motion is involved.
Place a 1-kilogram block of iron at 40oC into 1 kilogram of water at 20oC and the final
temperature of the two becomes
A) less than 30oC.
B) at or about 30oC.
C) more than 30oC.
The principle of continuity states that for fluid flow to be continuous it must
A) speed up in narrow regions of flow.
B) slow down in wide regions of flow.
C) both of these
D) neither of these
An ice cube floating in a glass of water contains many air bubbles. When the ice melts,
the water level will
A) rise.
B) fall.
C) remain unchanged.
Strictly speaking, more fuel is consumed by your car if the air conditioner, headlights,
or even a radio is turned on. This statement is
A) false.
B) true only if the car's engine is running.
C) true.
Whereas electric charges can be isolated, magnetic poles
A) can also.
B) cannot.
C) gather in clusters.
D) none of the above
If there were no greenhouse effect, Earth's average temperature would likely be
A) near absolute zero.
B) a frigid -18C.
C) comfortably cooler.
D) warmer than now.
Electromagnetic induction is employed in
A) electric power lines.
B) triggering traffic lights.
C) hybrid automobiles.
D) mobile phones.
E) all the above
An airplane travels at 141 km/h toward the northeast. What is its component of velocity
due north?
A) 41 km/h
B) 100 km/h
C) 110 km/h
D) 141 km/h
A vertically-held sledge hammer is easier to balance when the heavier end is
A) on your hand.
B) at the top, away from your hand.
C) the same either way
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
If you jounce up and down on a bathroom scale, what varies on the scale reading is
A) mg.
B) the normal force.
C) both of these
D) neither of these
A current-carrying loop of wire experiences no tendency to rotate in a magnetic field
when
A) field lines pass directly through the loop.
B) no field lines pass through the loop.
C) none of these
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
Which involves a larger number of calories?
A) the condensation of 1 gram of steam at 100oC to water at 100oC
B) the cooling of 1 gram of water at 100 degrees Celsius to 1 gram of ice at absolute
zero
C) both the same
D) none of these
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
A fast-moving missile soaring overhead possesses
A) speed.
B) force.
C) both of these
D) neither of these
A fan attached to an ice sailcraft stalled on a windless day blows air into the sail that
bounces backward upon impact. The boat
A) moves in the direction of the wind impact force.
B) does not move by this wind impact.
C) moves, but in the opposite direction of the wind impact force.
The half-life of carbon 14 is 5730 years. If a 1-gram sample of old carbon is 1/8 as
radioactive as 1-gram of a current sample, then the age of the old sample is about
A) 716 years.
B) 11,500 years.
C) 17,200 years.
D) 22,900 years.
E) 46,000 years.
As a ball bounces from a floor, its acceleration off the floor between bounces is
A) significantly less than g.
B) g.
C) slightly more than g.
D) significantly more than g.
