When a 10-N object is suspended at rest by two equally-taut vertical strands of rope, the
tension in each strand is
A) less than 5 N.
B) 5 N.
C) more than 5 N.
D) 10 N.
Answer:
Although tornadoes occur in many parts of the world, they are very common
A) along the Gulf Coast.
B) in the northeastern part of the United States.
C) in the Central Plains.
D) on the western slopes of the Rockies.
Answer:
We are warmed by condensation because water molecules in the air that strike our
bodies
A) transfer some of their kinetic energy to us.
B) gain kinetic energy as they change state.
C) form an insulating layer on our bodies.
D) none of these
Answer:
When a metal ring with a gap in the shape of the letter C is cooled, the gap becomes
A) wider.
B) narrower.
C) remains the same size.
Answer:
Which type of radiationalpha, beta, or gammaresults in the least change in atomic
number?
A) alpha radiation
B) beta radiation
C) gamma radiation
D) They all result in the same change in atomic mass number.
Answer:
The origin of the glow from the filament inside the ac incandescent lamp in your
bedroom is
A) electrons resupplied by the wall outlet.
B) electrons already in the filament.
C) the positive charges that flow in the filament.
D) resistance in the filament.
Answer:
The dominant force at divergent boundaries is
A) compression.
B) tension.
C) shearing.
D) similar to that in reverse faulting.
Answer:
Water at 4C will sink to the bottom of a pond because
A) it will not freeze there.
B) it benefits fish and other life forms there.
C) like a rock, it is denser than surrounding water.
D) of the presence of microscopic ice crystals.
Answer:
In contact metamorphism, we generally find
A) water-rich, high-temperature rocks at the contact border.
B) dry, high-temperature rocks at the contact border.
C) water-rich, low-temperature rocks at the contact border.
D) dry, low-temperature rocks at the contact border.
Answer:
Nellie tosses a ball upward at an angle. Assuming no air resistance, which component
of velocity changes with time?
A) the horizontal component
B) the vertical component
C) both of these
D) neither of these
Answer:
An umbrella tends to jerk upward on a windy day principally because
A) air gets trapped under the umbrella, which warms, and rises.
B) buoyancy increases with increasing wind speed.
C) air pressure is reduced over the curved top surface.
D) all of the above
Answer:
If the atmosphere were about 40 times thicker, at noon the Sun would appear
A) red-orange.
B) orange-green.
C) green-blue.
D) blue-violet.
E) none of the above
Answer:
Two motorcycle stunt drivers, one light and the other much heavier, ride their
motorcycles up and off an inclined ramp at identical speeds. They both rise in the air
and land downrange. Neglecting air resistance, the one to attain the greatest height and
greatest range is the
A) light driver.
B) heavy driver.
C) both the same
Answer:
How are monomers and polymers related?
A) A monomer is a small, repeating unit that makes up a polymer.
B) A monomer is one strand of a polymer.
C) A monomer is made when you condense a polymer through polymerization.
D) A polymer is chemically identical to a monomer, only larger.
E) none of the above
Answer:
When the Moon assumes its characteristic thin crescent shape, the position of the Sun is
A) almost directly behind the Earth, so Earth is between the Sun and the Moon.
B) almost directly in back of the Moon.
C) at right angles to the line between the Moon and Earth.
Answer:
The San Andreas fault in California is a
A) thrust fault.
B) strike slip fault.
C) normal fault.
D) reverse fault.
Answer:
The temperature of melting ice is
A) 0C.
B) 32F.
C) both of these
Answer:
What is indicated by a gasoline’s octane rating?
A) the degree of branching in the gasoline hydrocarbons
B) the degree at which the compound ignites
C) the percentage of octane in the mixture
D) a measure of how many degrees it takes to ignite a mixture of octane
E) none of the above
Answer:
In general, warm days are associated with
A) high surface pressure.
B) low surface pressure.
C) summer storms.
D) negative change in pressure gradient.
Answer:
The maximum volume of sediment a stream can carry is dependent on the stream’s
A) laminar flow.
B) velocity.
C) discharge.
D) channel geometry.
Answer:
Hurricanes can be generated
A) in tropical desert areas.
B) from tropical storms with high levels of moisture and thermal energy.
C) as moist thermal winds cross over the equator.
D) by all of these.
Answer:
If the mass of an object does not change, a constant net force on the object produces
constant
A) velocity.
B) acceleration.
C) both of these
D) none of the above
Answer:
Zoned sequences of minerals are a characteristic of
A) contact metamorphism.
B) regional metamorphism.
C) foliated metamorphism.
D) mechanical deformation.
Answer:
Which two of these four structures are of the same structural isomer?
A) upper right and lower left
B) upper left and lower right
C) lower left and upper right
D) lower right and upper right
Answer:
Electric charge distributes itself on conducting surfaces
A) with greater concentration on flat parts.
B) such that the electric field inside is zero.
C) both of the above
D) none of the above
Answer:
Relative to radio waves, the velocity of visible light waves in a vacuum is
A) less.
B) more.
C) the same.
Answer:
Sediments convert to rock when they undergo
A) compaction and cementation.
B) lithification.
C) both A and B.
Answer:
In a hydraulic-press operation, it is impossible for the
A) output displacement to exceed the input displacement.
B) force output to exceed the force input.
C) energy output to exceed the energy input.
D) output piston’s speed to exceed the input piston’s speed.
E) none of the above
Answer:
The current in a 100-W bulb connected to a 120-V source is
A) 0.5 A.
B) 1.2 A.
C) 12,000 A.
D) none of the above
Answer:
If you quickly run away from the orchestra at a concert, the frequency of the sound you
hear will be
A) decreased.
B) increased.
C) neither of these
Answer: