Principles of Physics
Test Preparation
Course Introduction
Principles of Physics explores the fundamental concepts and laws that govern the physical universe, including motion, forces, energy, momentum, and the properties of matter and waves. This course provides a comprehensive introduction to classical mechanics, thermodynamics, electromagnetism, optics, and an overview of modern physics topics such as quantum mechanics and relativity. Emphasis is placed on developing problem-solving skills, understanding the scientific method, and applying theoretical principles to real-world phenomena through experiments and practical exercises. It serves as a foundation for further study in physics and related scientific disciplines.
Recommended Textbook
The Physical Universe 15th Edition by Konrad Krauskopf
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19 Chapters
988 Verified Questions
988 Flashcards
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Chapter 1: The Scientific Method
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Sample Questions
Q1) A planet that cannot be seen with the unaided eye is A)Neptune.
B)Jupiter. C)Mars.
D)Mercury.
Answer: A
Q2) A regularity in observed data or a relationship between different quantities is usually called a A)hypothesis. B)law. C)theory. D)model.
Answer: B
Q3) A centimeter is
A)0.001 m.
B)0.01 m.
C)0.1 m.
D)10 m.
Answer: B
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Page 3
Chapter 2: Motion
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Sample Questions
Q1) A stone dropped from a cliff reaches the ground in 4 s.The stone's speed is then
A)10 m/s.
B)40 m/s.
C)196 m/s.
D)392 m/s.
Answer: B
Q2) The mass of a sack of potatoes whose weight is 200 N is
A)20.4 kg.
B)91 kg.
C)210 kg.
D)440 kg.
Answer: A
Q3) An object moving in a circle at constant speed is accelerated
A)in the direction of its motion.
B)toward the center of the circle.
C)away from the center of the circle.
D)Any of these choices, depending on the circumstances.
Answer: B
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4
Chapter 3: Energy
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Sample Questions
Q1) A horse has a power output of 1 hp (746 W) when it is pulling a cart.If the cart covers 100 m in 30 s, the force the horse exerts on the cart is
A)0.22 kN.
B)0.34 kN.
C)0.45 kN.
D)2.49 kN.
Answer: A
Q2) The work you do in raising an orange from your waist to your mouth is roughly
A)1 J.
B)10 J.
C)100 J.
D)1,000 J.
Answer: A
Q3) A 1-N weight has a PE relative to the ground of 1 J when it is at a height of A)10.2 cm.
B)1 m.
C)9.8 m.
D)98 m.
Answer: B
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Page 5
Chapter 4: Energy and the Future
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Sample Questions
Q1) A factor that helps prevent the widespread use of hydrogen as a fuel is A)the need to first separate hydrogen from one of its chemical compounds, such as water.
B)the greenhouse gas produced when it combines with oxygen.
C)the small amount of energy liberated when it combines with oxygen.
D)its inability to be used in fuel cells.
Q2) The proportion of the world's electricity that comes from wind turbines is roughly A)3 percent.
B)10 percent.
C)20 percent.
D)30 percent.
Q3) Compact fluorescent light bulbs are more efficient than incandescent light bulbs
A)but do not last as long.
B)and last about as long.
C)and last longer.
D)any of these depending on the bulb's power.
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Chapter 5: Matter and Heat
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Sample Questions
Q1) The specific heat of ice is 2.1 kJ/kg<sup>\(\circ\)</sup>C.When 50 kJ of heat is removed from 2 kg of ice initially at -5<sup>\(\circ\)</sup>C, the final temperature of the ice is
A)-6<sup>\(\circ\)</sup>C.
B)-11<sup>\(\circ\)</sup>C. C)-12<sup>\(\circ\)</sup>C. D)-17<sup>\(\circ\)</sup>C.
Q2) Sublimation refers to
A)the vaporization of a solid without first becoming a liquid.
B)the melting of a solid.
C)the vaporization of a liquid.
D)the condensation of a gas into a liquid.
Q3) Fifty kJ of heat is added to a 10-kg piece of lead at its melting point of 330<sup>\(\circ\)</sup>C and 2 kg of lead melts.The heat of fusion of lead is
A)2.5 kJ/kg.
B)3.3 kJ/kg.
C)5 kJ/kg.
D)25 kJ/kg.
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Chapter 6: Electricity and Magnetism
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Sample Questions
Q1) A charge of +Q attracts a charge of -Q 1 cm away with a force of F. Another charge of +Q is placed next to the first one. The force on the charge of -Q is now
A) F/2.
B) F.
C) 2F.
D) 4F.
Q2) The conventional unit of battery capacity is the ampere-hour, which is actually a unit of A)energy.
B)power.
C)potential difference.
D)electric charge.
Q3) The electric energy stored in a 6-V battery rated at 20 Ah is A)120 J.
B)7.2 kJ.
C)12 kJ.
D)432 kJ.
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Chapter 7: Waves
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Sample Questions
Q1) Relative to the radio signals sent out by a spacecraft headed away from the earth, the signals that are received on the earth have
A)a lower speed.
B)a lower frequency.
C)a shorter wavelength.
D)all of these properties.
Q2) Sound waves of frequency 300 Hz have a wavelength relative to sound waves in the same medium of frequency 600 Hz that is
A)half as great.
B)the same.
C)twice as great.
D)four times as great.
Q3) When waves go from one place to another, they carry A)amplitude.
B)frequency.
C)wavelength.
D)energy.
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Page 9
Chapter 8: The Nucleus
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Sample Questions
Q1) The radiation dosage due to cosmic rays is greatest
A)in orbiting spacecraft.
B)in airplanes at high altitudes.
C)at sea level.
D)underground.
Q2) When a nucleus undergoes radioactive decay, its new mass number is A)always less than its original mass number.
B)always more than its original mass number.
C)never less than its original mass number.
D)never more than its original mass number.
Q3) The number of quarks in a proton or a neutron is A)1.
B)2.
C)3.
D)4.
Q4) The particle that most resembles the proton is the A)positron.
B)neutron.
C)antiproton. D)quark.
Page 10
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Chapter 9: The Atom
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Sample Questions
Q1) The wave character of a moving golf ball is not observed because
A)the ball is uncharged.
B)the matter waves are moving too fast.
C)the frequency of the matter waves is too low.
D)the wavelength of the matter waves is too short.
Q2) The wavelengths in the various spectral series of an element
A)are the same for all elements.
B)are random.
C)are different for each element.
D)are different in the emission and absorption spectra of an element.
Q3) An electron and a gamma ray have the same wavelength.
A)The electron has less energy than the photon energy of the gamma ray.
B)The electron has the same energy as the photon energy of the gamma ray.
C)The electron has more energy than the photon energy of the gamma ray.
D)Any of these choices could be correct, depending on the wavelength.
Q4) When light is directed at a metal surface, the emitted electrons
A)are called photons.
B)have random energies.
C)have energies that depend upon the intensity of the light.
D)have energies that depend upon the frequency of the light.
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Chapter 10: The Periodic Law
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Sample Questions
Q1) The inert gases
A)have the same atomic number.
B)are in the same period of the periodic table.
C)are in the same group of the periodic table.
D)join in pairs to form diatomic molecules.
Q2) The name of the compound Ca<sub>3</sub>N<sub>2</sub> is
A)calcium nitride.
B)calcium nitrate.
C)calcium nitrite.
D)calcium trinitride.
Q3) The atomic mass of an element is
A)the average atomic mass of its isotopes according to their proportions in nature.
B)the average mass number of its isotopes according to their proportions in nature.
C)the average atomic number of its isotopes according to their proportions in nature.
D)the atomic mass of its most abundant isotope.
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Chapter 11: Crystals, Ions, and Solutions
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Sample Questions
Q1) The individual particles in a covalent solid are held together as a result of
A)electron transfer between adjacent atoms.
B)electron sharing between adjacent atoms.
C)the attraction of polar molecules.
D)a gas of freely moving electrons.
Q2) The symbol of the hydroxide ion is
A)H<sub>3</sub>O<sup>-</sup>.
B)H<sub>3</sub>O<sup>+</sup>.
C)OH<sup>-</sup>.
D)OH<sup>+</sup>.
Q3) When equivalent amounts of a strong acid and a strong base react, the resulting solution is
A)acidic.
B)basic.
C)neutral.
D)pure water.
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13
Chapter 12: Chemical Reactions
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Sample Questions
Q1) One mole of which of the following compounds contains the largest number of fluorine atoms?
A)HF.
B)SF<sub>2.</sub>
C)BF<sub>3.</sub>
D)XeF<sub>6.</sub>
Q2) Which of the following compounds is not classed as an oxide?
A)CO<sub>2.</sub>
B)SiO<sub>2.</sub>
C)BaSO<sub>4.</sub>
D)H<sub>2</sub>O.
Q3) At ordinary temperatures, the temperature increase needed to double the rate of many common chemical reactions is
A)1<sup>\(\circ\)</sup>C.
B)10<sup>\(\circ\)</sup>C.
C)50<sup>\(\circ\)</sup>C.
D)100<sup>\(\circ\)</sup>C.
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14
Chapter 13: Organic Chemistry
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Sample Questions
Q1) A variety of alkanes is found in A)gasoline.
B)carbohydrates. C)proteins.
D)esters.
Q2) The presence of a COOH group is characteristic of an A)alkane.
B)organic acid.
C)aldehyde.
D)ester.
Q3) Ethanol
A)is also known as methyl alcohol.
B)is not poisonous.
C)has OH groups in its molecules.
D)ionizes when added to water.
Q4) Amino acids are the basic units of A)carbohydrates. B)proteins.
C)lipids.
D)nucleic acids.
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Chapter 14: Atmosphere and Hydrosphere
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Sample Questions
Q1) Rain is not usually associated with A)a warm front.
B)a cold front.
C)a cyclone.
D)an anticyclone.
Q2) The higher the temperature of a volume of air, the
A)more water vapor it can hold.
B)less water vapor it can hold.
C)greater its possible relative humidity.
D)lower its possible relative humidity.
Q3) The doldrums of the equatorial regions
A)have abundant rainfall.
B)are extremely dry.
C)have steady westerly winds.
D)are also called the horse latitudes.
Q4) Stable weather is associated with A)cyclones.
B)anticyclones.
C)cold fronts.
D)warm fronts.
Page 16
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Chapter 15: The Rock Cycle
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Sample Questions
Q1) In their early stages, river valleys exhibit characteristic A)U-shaped cross sections.
B)V-shaped cross sections.
C)water tables.
D)moraines.
Q2) Of the following rocks, the one that does not originate in sediments laid down by water, wind, or ice is A)shale.
B)conglomerate.
C)marble.
D)sandstone.
Q3) Marble is the result of the metamorphosis of A)shale.
B)basalt.
C)granite.
D)limestone.
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Page 17
Chapter 16: The Evolving Earth
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Sample Questions
Q1) The theory of evolution is credited to
A)Charles Lyell.
B)Charles Darwin.
C)Abraham Werner.
D)Bishop Ussher.
Q2) Large-scale biological extinctions can be caused by A)volcanic activity.
B)tectonic activity.
C)asteroid impacts.
D)All of these choices.
Q3) The Andes are the result of
A)an oceanic plate sliding under a continental plate.
B)two oceanic plates colliding.
C)two continental plates colliding.
D)an enormous earthquake.
Q4) The leading explanation for the disappearance of the dinosaurs ascribes it to A)an Ice Age.
B)an asteroid impact.
C)solar ultraviolet radiation.
D)hunting by early humans.
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Chapter 17: The Solar System
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Sample Questions
Q1) At full moon, the moon is
A)between the earth and the sun.
B)on the opposite side of the earth from the sun.
C)on the opposite side of the sun from the earth.
D)not in line with the earth and the sun.
Q2) The solar wind
A)blows over the sun's surface.
B)consists of photons streaming from the sun.
C)consists of ions streaming from the sun.
D)consists of hydrogen atoms streaming from the sun.
Q3) The surface of Jupiter's satellite Europa may be covered by A)vegetation.
B)metallic hydrogen.
C)the highest volcanoes in the solar system.
D)a layer of water ice floating on liquid water.
Q4) The planet having a period of rotation nearest the earth's is A)Mercury.
B)Venus.
C)Mars.
D)Saturn.
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Chapter 18: The Stars
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Sample Questions
Q1) A star must have a certain minimum mass in order that gravity squeeze its matter sufficiently to
A)hold it together as a single body.
B)produce a temperature high enough for it to glow.
C)produce a temperature high enough for nuclear reactions to start.
D)turn its interior into liquid hydrogen.
Q2) Brown dwarfs are
A)visible to the naked eye.
B)present in the solar system.
C)relatively rare.
D)relatively common.
Q3) What keeps light from escaping from a black hole is its
A)strong electric field.
B)strong magnetic field.
C)strong gravitational field.
D)absorbing atmosphere.
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Chapter 19: The Universe
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Sample Questions
Q1) As they came into being, the planets were primarily heated by A)gravitational compression.
B)solar radiation.
C)cosmic rays.
D)cosmic background radiation.
Q2) Primary cosmic rays are produced
A)in the solar system.
B)in galaxies.
C)in the regions between galaxies.
D)everywhere in the universe.
Q3) The Milky Way is a A)globular duster.
B)nearby galaxy.
C)galaxy with the sun at its center.
D)galaxy with the sun some distance from its center.
Q4) The most distant galaxies are receding at speeds that are A)much less than the speed of light.
B)not far from the speed of light.
C)equal to the speed of light.
D)greater than the speed of light.
21
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