The speeds of the planets about the Sun depend on
A) their distances from the Sun.
B) the masses of the planets.
C) both of these
D) none of the above
Answer:
While in an airplane flying at 100 km/h you look down from the window and spot
another airplane flying at the same speed in the opposite direction. Relative to you, the
speed of the spotted plane is
A) zero.
B) 100 km/h.
C) 150 km/h.
D) 200 km/h.
Answer:
The number of grams of ice that can be melted by 1 g of 100C steam is
A) 0.125 g.
B) 0.148 g.
C) 6.75 g.
D) 8 g.
E) none of the above
Answer:
After a stone that is thrown straight up reaches the top of its path and then falls
downward, its acceleration is
A) greater than at the top of its path.
B) less than at the top of its path.
C) the same as at the top of its path.
Answer:
When Danny Diver who weighs 500 N steps off a diving board 10 m above the water,
he hits the water with kinetic energy of
A) 10 J.
B) 500 J.
C) 510 J.
D) 5000 J.
E) more than 5000 J.
Answer:
Why might sodium carbonate (washing soda, Na2CO3) be added to hard water to aid in
cleaning?
A) The hard ions in the water are more attracted to the carbonate ions -2 charge.
B) Thehard ions are dissolved by the added sodium ions.
C) The soap gets softer due to the added ions.
D) The ions solubilize the soap due to ion-ion intermolecular attraction, which
improves the cleaning ability.
E) none of the above
Answer:
Two billiard balls having the same mass roll toward each other at the same speed. What
is the net momentum of the two-ball system?
A) 0 kg∙m/s
B) 10 kg∙m/s
C) not enough information
Answer:
In the above diagram, which atom behaves as the oxidizing agent, the lighter colored
atom or the darker colored atom?
A) Both atoms behave as the oxidizing agent.
B) Neither of the atoms behave as the oxidizing agent.
C) The darker colored atom behaves as the oxidizing agent.
D) The lighter colored atom behaves as the oxidizing agent.
Answer:
Which of the following occupies the smallest percentage of the electromagnetic
spectrum?
A) radio waves
B) microwaves
C) visible light
D) gamma rays
Answer:
In a battery, the following oxidation-reduction reaction is taking place:
Mn2O3 + ZnO → 2 MnO2 + Zn
What is undergoing reduction as written?
A) Zn
B) ZnO
C) MnO2
D) Mn2O3
E) none of the above
Answer:
The electric field around an isolated electron has a certain strength at a 1-cm distance
from the electron. The electric field strength 2 cm from the electron is
A) half as much.
B) the same.
C) twice as much.
D) four times as much.
E) none of the above
Answer:
Someone argues that he or she doesn’t drink tap water because it contains thousands of
molecules of some impurity in each glass. How would you respond in defense of the
water’s purity, if it indeed does contain thousands of molecules of some impurity per
glass?
A) Impurities aren’t necessarily bad, in fact, they may be good for you.
B) The water contains water molecules and each water molecule is pure.
C) There’s no defense. If the water contains impurities it should not be drunk.
D) Compared to the billions and billions of water molecules, a thousand molecules of
something else is practically nothing.
Answer:
Which of the following intermolecular forces best describes why molecules like sucrose
(which has many OH groups) are very water soluble?
A) dipole-dipole
B) induced dipole-induced dipole
C) dipole-induced dipole
D) ion-dipole
E) hydrogen bonding
Answer:
In a battery, the following oxidation-reduction reactions are taking place:
Mn2O3 + ZnO → 2 MnO2 + Zn
What is being formed at the anode?
A) Zn
B) ZnO
C) MnO2
D) Mn2O3
E) none of the above
Answer:
When a bar magnet is thrust at the same speed into a coil having twice the number of
loops, the induced voltage is
A) half.
B) the same, no different.
C) twice as much.
D) four times as much.
E) none of the above
Answer:
Limestone may be made up of
A) fragments of granitic and andesitic rocks.
B) animal bones.
C) shell fragments from marine animals.
D) plant debris.
Answer:
When the handle of a tuning fork is held solidly against a table, the time the fork keeps
vibrating becomes
A) longer.
B) shorter.
C) remains the same
Answer:
Which of the following is a pure substance?
A) baking soda
B) salt water
C) cooking oil
D) duct tape
E) orange juice
Answer:
If air speed is greater along the top surface of a bird’s wings, pressure of the moving air
there is
A) unaffected.
B) less.
C) more.
D) turbulent.
Answer:
When Marie pushes her desk to the right, friction between the floor and the desk acts
toward
A) the left.
B) the right.
C) at right angles to her push.
D) none of the above
Answer:
During the Precambrian, the development of the ozone layer helped
A) primitive organisms on Earth’s surface to nucleate.
B) shield Earth’s surface from harmful ultraviolet radiation.
C) promote the emergence of stromatolites.
D) promote the development of anaerobic organisms.
Answer:
An 800-N woman stands at rest on two bathroom scales so that one scale shows a
reading of 500 N. The reading on the other scale is
A) 200 N.
B) 300 N.
C) 400 N.
D) 800 N.
E) none of the above
Answer:
When the Sun passes between the Moon and the Earth, we have
A) a solar eclipse.
B) a lunar eclipse.
C) met our end.
Answer:
The repeating trends that take place when examining the elements are called
A) periodic.
B) the family cycle.
C) the metal shift.
D) a group conscience.
E) none of the above
Answer:
The Devonian period is most noted for the
A) ability of certain fishes to breath air.
B) ability of certain fishes to move onto land.
C) first amphibians.
D) great diversification of fishessome developed lungs, some moved to land, and some
became amphibians.
Answer:
A coulomb of charge flowing in a bulb filament powered by a 6-volt battery is provided
with
A) 6 ohms.
B) 6 amperes.
C) 6 joules.
D) 6 watts.
E) 6 newtons.
Answer:
Maximum specific humidity is an ideal way to express capacity, because specific
humidity
A) does not change as air expands or contracts.
B) is a mass measurementgrams/kilograms.
C) is the mass of water vapor per volume of air.
D) is the pressure exerted by water vapor.
Answer:
Which of the following elements will most likely form an ion with a +2 charge?
A) Na
B) Mg
C) Ne
D) Si
E) Cl
Answer:
Mauna Loa is a
A) cinder cone.
B) shield volcano.
C) composite volcano.
D) none of these
Answer:
Every magnet contains at least
A) one pole.
B) two poles.
C) four poles.
Answer: