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To make a profit a buyer purchases metal by weight at one altitude and sells it at the
same price per pound at another altitude. The supplier should
A) buy at a high altitude and sell at a low altitude.
B) buy at a low altitude and sell at a high altitude.
C) it makes no difference.
Pascal's principle applies to
A) liquids.
B) gases.
C) both of these
D) none of these
Heavier atoms are not proportionally larger than lighter atoms due to the greater
number of protons
A) pulling surrounding electrons into tighter shells.
B) squeezed into tighter spaces.
C) both of these
D) none of these
If light in a spectroscope were passed through a star-shaped opening instead of a thin
slit, spectral lines would appear as
A) lines of poorer resolution.
B) stars.
C) blobs of no definite shape.
The muzzle velocity of a bullet fired from a new rifle is 100 m/s. Neglecting air
resistance, at the end of one second a bullet fired straight up into the air will have
traveled a distance of
A) (100 - 5) m.
B) (100 + 5) m.
C) 100 m.
D) 5 m.
E) none of the above
If all the uranium in the world were exhausted, breeder reactors would be
A) in greater demand.
B) relics of a brief age.
C) both of these
D) neither of these
The circular path of a satellite orbiting Earth is characterized by a constant
A) speed.
B) acceleration.
C) radial distance.
D) all of the above
E) none of the above
A vertical vector of 3 units combined with a horizontal vector of 4 units has a resultant
of
A) 1 unit.
B) 5 units.
C) 7 units.
Using the relativistic velocity-addition formula for adding everyday velocities produces
A) nonsense.
B) a significantly better result than adding them classically.
C) a classical result.
Refrigerator magnets are typically
A) short range.
B) long range.
C) none of these
Object and image for a plane mirror occur
A) along the same plane.
B) equal distances from the mirror.
C) at right angles to each other.
D) all of the above
E) none of the above
Soaring birds and glider pilots can remain aloft for hours without expending power, due
to
A) conduction.
B) convection.
C) radiation.
D) all of the above
Water freezes at atmospheric pressure and a temperature of
A) 0 degrees Celsius.
B) 32 degrees Fahrenheit.
C) about 273 kelvin.
D) all of the above
E) none of the above
When you weigh yourself on a bathroom scale on a slight incline instead of a level
surface, your weight reading on the scale will be
A) less.
B) no different.
C) more.
If the temperature of a sample of water at 4oC is slightly lowered, its volume
A) increases.
B) decreases.
C) remains the same.
The products of nuclear fission are radioactive due to their
A) combustive natures.
B) capacity to hold vast amounts of energy.
C) greater neutron to proton ratio compared with stable nuclei in the same mass range.
D) short half-lives.
E) none of the above
Colors seen when gasoline forms a thin film on water illustrate
A) refraction.
B) reflection.
C) dispersion.
D) polarization.
E) interference.
Consider two flywheels of the same size and shape, but one with twice the mass.
Rotational inertia of the more massive one is
A) two times greater.
B) four times greater.
C) the same as the other one.
D) half.
A laser cannot emit more energy than is put into it. But in instances where stored energy
can be released in a very short time, the laser
A) puts out more energy than is put into it.
B) has a greater power output than power input.
C) both of these
D) neither of these
Who envisioned the motion of planets as projectiles obeying the laws of physics?
A) Kepler
B) Newton
C) both of these
D) neither of these
A heavy block at rest is suspended by a vertical rope. When the block accelerates
upward by the rope, the rope tension
A) is less than its weight.
B) equals its weight.
C) is greater than its weight.
Rate this statement: No force due to Earth's gravity acts on astronauts inside the
orbiting space station.
A) always true while in orbit
B) sometimes true while in orbit
C) always false
We feel uncomfortably warm on a muggy day because water molecules are
A) evaporating from our moist bodies.
B) condensing on our bodies.
C) evaporating and condensing on our bodies at the same rate.
D) none of the above
Which force field can increase a moving electron's speed?
A) electric field
B) magnetic field
C) both of these
D) neither of these
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
Clocks on a spaceship moving at high speed relative to the Earth run more slowly when
viewed from
A) within the spaceship.
B) Earth.
C) both of these
D) neither of these
Voltage is most similar to
A) pressure.
B) current.
C) resistance.
D) all of the above
E) none of the above
Inertia is defined as a
A) force.
B) property of matter.
C) change in motion.
D) none of the above
To say that electric charge is conserved means that no case has ever been found where
A) the total charge on an object has changed.
B) quantity of negative charge on an object exactly balances positive charge.
C) the total quantity of charge on an object has increased.
D) net charge has been created or destroyed.
E) none of the above
Magnetic domains normally occur in
A) copper.
B) silver.
C) iron.
D) all of the above
E) none of the above
If a certain object emits visible waves rather than infrared waves its temperature is
A) higher.
B) lower.
C) the same, temperature doesn't make any difference.
A 2500-N pile-driver ram falls 10 m and drives a post 0.1 m into the ground. The
average impact force on the ram is
A) 2,500 N.
B) 25,000 N.
C) 250,000 N.
D) 2,500,000 N.
When a solid melts, energy is
A) absorbed by the solid.
B) released by the solid.
C) both of these
D) neither of these
During a very cold winter, water pipes sometimes burst due to
A) the ground contracting when colder.
B) water expanding when freezing.
C) water contracting when freezing.
D) thawing producing pressure on the pipes.
E) none of the above
