An electric motor and electric generator are
A) very similar devices.
B) entirely different devices.
C) none of the above
Answer:
When air is compressed, its temperature
A) increases.
B) decreases.
C) neither of these
Answer:
A nutritionist in the United States measures food energy in units of
A) kilocalories.
B) Calories.
C) both are the same
D) neither of the above
Answer:
What is the formula mass of sulfur dioxide, S ?
A) about 16 amu
B) about 32 amu
C) about 60 amu
D) about 64 amu
Answer:
One of the skin-irritating components of poison oak is tetrahydrourushiol:
The long, nonpolar hydrocarbon tail embeds itself in a person’s oily skin, where the
molecule initiates an allergic response. Scratching the itch spreads tetrahydrourushiol
molecules over a greater surface area, causing the zone of irritation to grow. Is this
compound an alcohol or a phenol?
A) an alcohol because of the hydroxyl groups it contains
B) both a phenol and an alcohol because of the hydroxyl groups it contains
C) a phenol because of the hydroxyl groups attached to the benzene ring
D) neither an alcohol or phenol because it contains two hydroxyl groups instead of one
Answer:
The elements found on Earth have much to do with
A) white dwarfs.
B) neutron stars.
C) pulsars.
D) quasars.
E) supernovae.
Answer:
If water at 4C slightly decreases in temperature, the water
A) contracts.
B) expands.
C) neither of these
Answer:
Which is greater, the gravitational attraction between a newborn baby and the Earth, or
the gravitational attraction between the Earth and all the planets of the solar system?
A) the attraction between the baby and Earth
B) the attraction between the planets and Earth
C) They are roughly equal.
D) The baby’s and the planets gravitational attractions are inversely proportional to each
other.
Answer:
The quantity that most relates to the size of an object is
A) mass.
B) weight.
C) volume.
D) none of the above
Answer:
A hydraulic press multiplies a force by 100, which is compensated by
A) energy, which is divided by 100.
B) the lesser distance through which the force acts.
C) the time through which the force acts.
D) the mechanism providing the force.
E) none of the above
Answer:
The extent of the continental shelf, an underwater extension of continental crust from
shoreline to basin, varies due to fluctuations in sea level. When sea level is lower, the
continental shelf is
A) is narrow because less of the continental shelf is exposed.
B) is narrow because less of the continental shelf is submerged.
C) wider because some of the continental land would be submerged.
Answer:
Radiant energy from the Sun is composed of shorter wavelengths than radiation from
the Earth because the Sun
A) has much more thermal energy.
B) has a higher temperature than the Earth.
C) is an energy source while the Earth is primarily an energy receiver.
D) none of the above
Answer:
Moving electric charges will interact with
A) an electric field.
B) a magnetic field.
C) both of these
D) none of the above
Answer:
Ocean waves and currents generally form as a result of
A) swells.
B) the rotation of the Earth.
C) differences in ocean density.
D) wind.
Answer:
What property of an electron makes it possible to use electron microscopes?
A) They can be focused using smaller lenses.
B) They have shorter wavelengths than visible light.
C) They are electrically charged.
D) They can be generated with electricity.
E) none of the above
Answer:
If a freely-falling object were somehow equipped with a speedometer, its speed reading
would increase each second by about
A) 5 m/s.
B) 10 m/s.
C) 15 m/s.
D) a variable amount.
Answer:
What is the main difference between condensation polymers and addition polymers?
A) The condensation polymer has less atoms in it than the sum of the starting
monomers because a small molecule is lost during condensation.
B) The number of atoms incorporated into the addition polymer increases compared to
the starting monomers.
C) The number of atoms incorporated into the condensation polymer increases
compared to the starting monomers.
D) Condensation polymers all lose water molecules when they form.
E) All of the above are true.
Answer:
A blue object will appear black when illuminated with
A) blue light.
B) cyan light.
C) yellow light.
D) light.
E) none of the above
Answer:
If it takes three golf balls to equal the mass of one tennis ball, what mass of tennis balls
do you need to equal the number of golf balls in one kilogram of golf balls?
A) 1/3 of a kg
B) 30 kg
C) 1 kg
D) 3 kg
E) 6 kg
Answer:
Two light bulbs, a thick-filament one and a thin-filament one, are connected in series to
a battery. The voltage is greater across the lamp with the
A) thick filament.
B) thin filament.
C) same for both
Answer:
Karst topography is dominated by
A) rivers and lakes.
B) sinkholes, caves, and caverns.
C) rugged hills and valleys.
D) glaciers.
Answer:
When a 100-kg astronaut ejects 0.1 kg of gas at a speed of 50 m/s from her propulsion
pistol, her recoil speed is
A) 50 m/s.
B) 5.0 m/s.
C) 0.5 m/s.
D) 0.05 m/s.
Answer:
The temperature to which air must be cooled for saturation to occur is called
A) relative humidity.
B) dew point.
C) precipitation.
D) condensation point.
Answer:
The limit at which air contains as much moisture as it can hold for a given temperature
is called
A) the dew point.
B) saturation.
C) the evaporation point.
D) sublimation point.
Answer:
A heavy object and a light object in a vacuum are dropped at the same time from rest.
The heavy object reaches the ground
A) sooner than the light object.
B) at the same time as the light object.
C) later than the light object.
Answer:
Strictly speaking, if any electrical device in an automobile is turned on (such as an air
conditioner or even headlights), more fuel is consumed by the engine. This statement is
A) true.
B) true only if the engine is running.
C) always false.
D) sometimes true, sometimes false.
Answer:
How do fission power plants work?
A) The heat from a nuclear reaction is used to boil water.
B) The neutrons from a nuclear reaction undergo fusion with water to produce hydrogen
gas, which drives a turbine.
C) The electrons from a nuclear reaction are harnessed to produce an electrical current.
D) The krypton gas generated in the fission process is used to drive a turbine.
E) none of the above
Answer:
In what region of the Sun are most of X-rays generated?
A) the inner core
B) the photosphere
C) the chronosphere
D) the corona
Answer:
Dark energy bends the curvature of spacetime
A) in the exact same fashion as gravity.
B) in the opposite manner of gravity.
C) by absorbing all lightwaves that pass through it.
D) dark energy does not bend the curvature of spacetime.
Answer:
The difference between lightwaves approaching and lightwaves receding is
A) when approaching, lightwaves have higher frequency; when receding their
frequency is lower.
B) when approaching, lightwaves have lower frequency; when receding their frequency
is higher.
C) the frequency of approaching lightwaves remain constant, while receding lightwaves
are invisible.
D) There is no difference
Answer:
Burl and Paul have a total weight of 1300 N. The tensions in the ropes that support the
scaffold they stand on add to 1700 N. The weight of the scaffold itself must be
A) 400 N.
B) 500 N.
C) 600 N.
D) 800 N.
Answer: