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One watt is equal to ______________ per second.
A) one kilogram
B) one newton
C) one joule
D) one meter
The average adult radiates heat energy at the same rate as
A) a 10-W light bulb.
B) a 100-kW light bulb.
C) a 100-W light bulb.
D) none of these.
The image of a convex mirror is always
A) virtual, inverted, and larger.
B) virtual, upright, and smaller.
C) real, upright, and smaller.
D) real, inverted, and larger.
The photoreceptors responsible for "twilight" vision are called
A) rods.
B) cylinders.
C) cones.
D) cans.
Which simplest alcohol is used in race cars as fuel?
A) 2-Propanol
B) Ethylene glycol
C) Ethanol
D) Methanol
Rocks are classified into three types on the basis of their
A) process of formation.
B) age.
C) geographic origin.
D) color.
For a specific element, photons of how many different energies could be emitted by
electrons in the n= 6 level as they return to the n= 1 level?
A) 15
B) 21
C) 6
D) 1
Which occurrence is associated with the demise of the dinosaurs?
A) The Great Dying
B) The Cambrian explosion
C) The breakup of Pangaea
D) The K-T event
The upper boundary of the region in which the soil is saturated with water is known as
the
A) water table.
B) aquifer level.
C) zone of aeration.
D) Moho discontinuity.
A water molecule is
A) angular and nonpolar.
B) linear and polar.
C) linear and nonpolar.
D) angular and polar.
Earth's outer core is
A) liquid.
B) part solid and part liquid.
C) solid.
D) frozen.
One positive aspect of the potential use of methane hydrate as a fuel is that
A) there is more of it than there is of coal, oil, and natural gas.
B) it is easy to mine.
C) its use will never contribute to global warming.
D) it exists in a pure form ready for use.
The study of astronomy involves
A) space.
B) energy.
C) matter.
D) all of these.
Intrusive igneous rock formations that lie more or less parallel to older formations are
said to be ______________.
A) recordant
B) discordant
C) concordant
D) precordant
Which of the following is notdirectly involved in the second law of thermodynamics?
A) Spontaneous heat flow
B) Converting all heat input into work
C) Conservation of energy
D) Entropy
A compound consists of only magnesium, carbon, and oxygen. If the percentage by
mass of Mg is 74.9% and that of C is 19.2%, what is the percentage by mass of O?
A) 94.1%
B) 5.9%
C) 55.7%
D) 83.7%
E) None of the above
The terrestrial planets have
A) relatively high densities.
B) solid surfaces.
C) weak magnetic fields.
D) all of these.
Natural uranium contains about what percentage of the fissionable isotope 235U?
A) 50%
B) 99%
C) 1%
D) 19%
Which of the following polyatomic ions has a single minus charge?
A) Acetate
B) Sulfate
C) Phosphate
D) Ammonium
The magnitudes of two horizontal displacements are 1 m and 9 m, respectively. Given
that the vectors may be in either the plus or the minus direction, they cannotbe added
together to give a total displacement of
A) 10 m.
B) "8 m.
C) 8 m.
D) 9 m.
E) 7 m.
The Moon rises 50 minutes later each day because
A) the tidal forces on the Moon slow Earth's rotation, causing its period to be longer.
B) the Moon revolves eastward around Earth.
C) the Moon rotates on its axis.
D) the Moon revolves westward around Earth.
Element A, mass 19.00 g, reacts exactly with 7.00 g of element B to form 26.00 g of
compound AB. If 57.00 g of element A is reacted with 33.00 g of element B to form the
same compound, what mass of compound AB will be formed?
A) 19.00 g
B) 12.00 g
C) 11.00 g
D) 31.00 g
For low-mass stars, the life cycle phase that just precedes white dwarf formation is
A) planetary nebula.
B) variable star.
C) main-sequence star.
D) red giant.
A component in an automobile 12-V electrical system has a resistance of 30 . How
much current is in the component when in operation?
A) 42 A
B) 0.4 A
C) 2.5 A
D) 360 A
A system of 16 electrons, 11 protons, and 4 neutrons has a net charge of
A) "8.0 x 10-19 C.
B) 8.0 x 10-19 C.
C) "1.6 x 10-19 C.
D) "5.0 x 10-19 C.
E) 1.6 x 10-19 C.
Earth's core is believed to be composed of
A) iron and nickel.
B) silicate rocks.
C) carbon and silicon.
D) uranium and lead.
Another name for glucose is
A) dextrose.
B) malt sugar.
C) sucrose.
D) lactose.
The general formula ROH is that of
A) an amine.
B) an alkyl halide.
C) an alcohol.
D) none of these
A 20-resistor and a 30-resistor are wired in parallel and connected to a 9.0-V
battery.
a. How much current is drawn from the battery?
b. How much power is dissipated in the circuit?
When an electron in an atom moves from a lower energy level to a higher one, a
______________ is ______________.
A) photon; emitted
B) proton; emitted
C) photon; absorbed
D) proton; absorbed
A sound with a frequency of 48 kHz is in the ______________ region of the sound
spectrum.
A) infrasonic
B) ultrasonic
C) audible
D) visible
How much heat is necessary to change 10 g of ice at "10°C into water at 20°C?
A) 0.025 kcal
B) 0.25 kcal
C) 1.05 kcal
D) 0.095 kcal
Three resistors, 10 , 20 , and 30 , are wired in series and connected to a 120-V
battery. How much current flows in the circuit?
The Moon revolves eastward around Earth every ______________ solar days.
According to the _______________ theory, the universe began from a single point 13.7
billion years ago.
The rock on the underside of an inclined fault plane is called the footwall, and the rock
on the upper sideis called the ______________.
The Moon is on an observer's meridian about ______________ minutes later each day.
An element that tends to lose its valence electrons during chemical reactions is
classified as a(n) ______________.
When aqueous solutions of Na2CO3and BaCl2are mixed, the products are NaCl and
______________.
The leveling of the Earth's surface is known as ______________.
"All distant galaxies are moving away from us, and the farther away a galaxy is from
us, the faster it is moving" is a statement of _______________ law.
The resistances are added in a(n) ______________ circuit.
"Zulu" is the designation for _____________ time.
A ______________ has a definite volume and assumes the shape of its container.
The SI unit of centripetal acceleration is ______________.
Probably the best-known comet is ______________ Comet.
Draw the structural formula for 2-pentene.
A student with a 5.0-kg book bag on her way to class climbs two flights of stairs (a
10-m vertical distance) in 15 s. At what rate did the student do work in carrying the
book bag up the stairs?
The Moon's average distance from Earth is about _______ km.
If a water sample contains 2 ppm of dissolved salt, it contains 2 g of salt in every
______________ g of water.
The dominant mass of the solar system is the ______________.
Because sediments are not deposited continuously in a given locality over time, breaks
called ______________ occur in the rock record.
