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Electrical forces inside a nucleus contribute to nuclear
A) stability.
B) instability.
C) both of these
D) neither of these
A single brick falls with acceleration g. The reason a double brick falls with the same
acceleration is
A) that in free fall all accelerations are g.
B) its ratio of force to mass is the same.
C) an experimental fact tested many times.
D) none of the above
A very lightweight horizontal loop of wire is suspended from a fine spring, lowered into
water, and then raised to the surface. Any further attempt to raise it causes the spring to
A) stretch.
B) contract.
C) stay the same.
Dr. Chuck projects a ball horizontally from a lab bench. The ball lands on a bullseye
marked on the floor a horizontal distance away. Compared to the time for the ball to
simply drop vertically from the bench, the time in the air for Dr. Chuck's projected ball
is
A) less.
B) the same.
C) greater.
Hydro and wind power are indirect forms of
A) solar energy.
B) fossil fuels deep down.
C) nuclear energy in Earth's interior.
D) none of the above
A 2-kg box of taffy candy has 40 J of potential energy relative to the ground. Its height
above the ground is
A) 1 m.
B) 2 m.
C) 3 m.
D) 4 m.
E) none of the above
Very low-intensity light passing through a double slit produces a pattern that
A) is built up one photon at a time.
B) reveals which slit each photon passed through.
C) changes only in intensity as time passes, not in detailed structure.
What is the total number of individual atoms in a water molecule?
A) one
B) two
C) three
D) four
E) none
By convention, the direction of current in a circuit is
A) from the positive terminal of a source to the negative terminal.
B) the direction in which positive charge flows.
C) both of these
D) neither of these
Which of these will penetrate into lead?
A) alpha particle
B) beta particle
C) gamma ray.
D) all of the above
Physicists today consider the Bohr model of the atom to be
A) an accurate picture of a hydrogen atom.
B) totally useless of historical interest only.
C) oversimplified, but nevertheless useful.
Water pressure on a submerged object is greatest against its
A) top.
B) bottom.
C) sides.
D) same against all surfaces
E) none of the above
If the planet Jupiter underwent gravitational collapse, its rate of rotation about its axis
would
A) decrease.
B) increase.
C) stay the same.
D) need more information
Solar winds headed in Earth's direction are deviated mainly by
A) the upper atmosphere.
B) the troposphere.
C) Earth's magnetic field.
D) Earth's radiation belts.
Event A occurs before event B in a certain frame of reference. In another frame of
reference, event A could occur
A) after event B.
B) simultaneous with event B.
C) either of these
D) neither of these
Tomatoes have a higher specific heat capacity than dough. This means that when you
bite into a hot pizza
A) the dough feels hotter than the tomato sauce.
B) the tomato sauce feels hotter than the dough.
C) since sauce and dough are at the same temperature, neither feels hotter.
A beam of electrons has
A) wave properties.
B) particle properties.
C) both of these
D) neither of these
If gravity between the Sun and Earth suddenly vanished, Earth would continue moving
in
A) a curved path.
B) an outward spiral path.
C) an inward spiral path.
D) a straight-line path.
A whitish sky is evidence that the atmosphere contains
A) predominantly small particles.
B) predominantly large particles.
C) a mixture of particle sizes.
D) water vapor.
E) pollutants.
Just as a sustained flow of water in a hydraulic circuit needs a pump, in electric circuits
the flow of charge needs
A) current.
B) voltage.
C) resistance.
When Kepler devised his laws of planetary motion, he was most influenced by
A) Galileo.
B) Newton.
C) Tycho Brahe.
An object at rest near the surface of a distant planet starts to fall freely. If the
acceleration there is twice that of the Earth, its speed one second later would be
A) 10 m/s.
B) 20 m/s.
C) 30 m/s.
D) 40 m/s.
As a parcel of air at high altitude sinks to a lower elevation with no heat input or output,
its temperature
A) increases.
B) decreases.
C) will remain unchanged.
Sound will be louder if a struck tuning fork is held
A) in the air.
B) with its base against a tabletop.
C) with its prongs in shallow water.
D) in your closed fist.
When a living cell doubles in diameter, it has eight times the mass to be nourished, and
the amount of membrane through which it feeds is
A) only twice as much.
B) only four times as much.
C) also eight times as much.
D) more than eight times as much.
Your image in a plane mirror is
A) virtual.
B) real.
C) both of these
D) neither of these
Objects that radiate relatively well
A) absorb radiation relatively well.
B) reflect radiation relatively well.
C) both of these
D) neither of these
The amount of water displaced by a liter-sized block of ordinary wood floating in water
is
A) less than 1 liter.
B) 1 liter.
C) more than 1 liter.
D) depends on the water density
E) none of the above
The mass of ice that can be melted by 1 gram of 100oC steam is (Hint: Don't forget
about hot water remaining from condensed steam.)
A) 0.125 gram.
B) 0.148 gram.
C) 6.75 grams.
D) 8 grams.
E) none of the above
Colors are barely seen or not at all in nighttime because moonlight
A) has almost no colors in it.
B) is too dim to activate the retina's cones.
C) photons don't have enough energy to activate the retina's cones.
D) is primarily yellow light.
E) is only semi-transparent in Earth's atmosphere.
