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Which of these nuclei has the least mass?
A) hydrogen
B) iron
C) lead
D) uranium
E) all the same
Systems alone tend to move toward
A) order.
B) disorder.
C) temperature inversions.
D) none of the above
If an object falling freely were somehow equipped with an odometer to measure the
distance it travels, then the amount of distance it travels each succeeding second would
be
A) constant.
B) less and less each second.
C) greater than the second before.
D) doubled.
Reflected light from the Moon in a lake often appears as a vertical column when the
water is
A) perfectly still.
B) slightly rough.
C) very rough as with churning waves.
Which is a useful property of a prism?
A) internally reflects 100% of incident light
B) changes directions of light in a variety of ways
C) re-inverts images
D) all the above
E) none of the above
Metals are shiny because
A) they reflect 100% of incident light.
B) they are poor absorbers of light.
C) their electrons vibrate to the oscillations of any incident light.
D) none of the above
An archer shoots an arrow. Consider the action force to be the bowstring against the
arrow. The reaction to this force is the
A) combined weight of the arrow and bowstring.
B) friction of the ground against the archer's feet.
C) grip of the archer's hand on the bow.
D) arrow's push against the bowstring.
Which has zero acceleration? An object
A) at rest.
B) moving at constant velocity.
C) in mechanical equilibrium.
D) all of the above
E) none of the above
A 1-kg ball is thrown at 10 m/s straight upward. Neglecting air resistance, the net force
that acts on the stone when it is halfway to the top of its path is about
A) 1/2 N.
B) 1 N.
C) 5 N.
D) 7.5 N.
E) 10 N.
A lunar month is about 28 days. If the Moon were closer to Earth than it is now, the
lunar month would be
A) less than 28 days.
B) about 28 days.
C) more than 28 days.
D) need more information
Two identical blocks of iron are placed in contact, one at 10oC and the other at 20oC. If
the cooler block cools to 5oC and the warmer block warms to 25oC, this would violate
the
A) first law of thermodynamics.
B) second law of thermodynamics.
C) third law of thermodynamics.
D) none of the above
The Bernoulli effect causes passing ships to be drawn together when the ships are close
and moving in
A) the same direction.
B) opposite directions.
C) either of these
After passing through double slits, electrons make a pattern on a screen that
A) shows which slit each electron has passed through.
B) resembles a pattern that waves make.
C) has two peaks of intensity.
D) has a single wide peak of intensity.
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
A 101-MHz radio wave has vibrations per second of
A) less than 101,000,000.
B) 101,000,000.
C) more than 101,000,000.
Compared to ultraviolet waves, the frequency of infrared waves is
A) lower.
B) the same.
C) higher.
Some minerals glow when illuminated with ultraviolet light because
A) ultraviolet photons boost atomic electrons in the mineral to higher energy states.
B) ultraviolet photons have high energy.
C) of selective reflection.
D) of selective transmission.
E) none of the above
A paint pigment that absorbs blue light and gives off red light
A) is fluorescent.
B) is phosphorescent.
C) can be both of these
D) neither of these
An element is changed into a completely different element in
A) radioactive alpha decay.
B) radioactive beta decay.
C) nuclear fission.
D) nuclear fusion.
E) all of the above
Which will remain the same for two identical books, one lying flat and the other
standing on an end?
A) weight
B) pressure
C) both of these
D) neither of these
A strong spring is stretched 10 cm by a suspended block. If the block's weight is
doubled, the spring will stretch to
A) 15 cm.
B) 20 cm.
C) 40 cm.
D) its elastic limit.
Free protons and neutrons are spewed throughout the atmosphere by
A) nitrogen decay.
B) carbon decay.
C) the bombardment of cosmic rays upon atoms.
D) all of the above
E) none of the above
Neglecting air resistance, a bullet fired straight down from the top of a high cliff has an
acceleration of
A) less than 10 m/s2.
B) 10 m/s2.
C) more than 10 m/s2.
D) depends on the height of the cliff.
The fanning out of waves upon passing through an opening is more pronounced through
A) small openings.
B) large openings.
C) same for each
D) none of the above
A dam is thicker at the bottom than at the top mainly because
A) water is denser at deeper levels.
B) water pressure increases with depth.
C) surface tension exists only on the surface of liquids.
D) it looks better.
E) none of the above
An electron beam directed through a magnetic field
A) may be deflected.
B) may experience a force.
C) both of these
D) neither of these
When Niels Bohr was knighted for his contributions to physics, he chose for his coat of
arms
A) a model of the planetary atom.
B) a rendition of an energy-level diagram.
C) the yin-yang symbol of Eastern culture.
D) none of the above
The reason that evaporation is a cooling process is
A) radiation of heat during the process.
B) due to conduction and convection.
C) the more energetic molecules escape the liquid.
D) all of the above
E) none of the above
A 5-N block of wood is difficult to fully submerge in a pool of mercury because the
buoyant force on the block when submerged is
A) less than 5 N.
B) 5 N.
C) much more than 5 N.
A consequence of surface tension for water is
A) capillary action.
B) wet sand being firmer than dry sand.
C) the different tastes of hot and cold oily soup.
D) all of the above
E) none of the above
The efficiency of classroom-demonstration lasers is typically
A) about one percent.
B) about ten percent.
C) about twenty percent.
D) more than twenty percent.
A quark is a fundamental particle
A) that makes up a nucleon.
B) much smaller than a nucleon.
C) not composed of smaller parts.
D) all of the above
E) none of the above
