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61 Cards in this Set

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  • Back
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What is the common formula for work?
B. W=Fd
A. w=fp
B. W=Fd
C. W= Fd^2
D. W= F^2 d
Work is done when
A. displacement is not zero
A. displacement is not zero
B. displacement is zero
C. object moves in a complete circle
D. object is moved along a path and returned to its original position
A substance's termperature increases as a direct result of
B. kinetic energy being added to the particles of a substance
A. energy being removed from the particles of the substance
B. kinetic energy being added to the particles of a substance
C. change in the number of atoms and particles in a substance
D. decrease in volume of the substance
Heat flow occurs between two bodies in thermal contact when they differ in which of the following properties?
D. temperature
A. mass
B. specific heat
C. density
D. temperature
heat engines are more efficient when they operate at higher temperatures. This fact is an application of
C. the second law of thermodynamics
A. the law of superposition
B. the first law of thermodynamics
C. the second law of thermodynamics
D. the third law of thermodynamics
A piston and cylinder are used to compress a gas. The piston does work on the gas during the compression process equal to ΔW . As a result, the internal energy of the gas increases by the same amount. This is an example of
A. the first law of thermodynamics
A. the first law of thermodynamics
B. Boyle’s gas law
C. Charles’ gas law
D. The second law of thermodynamics
If a hot brass bar is dropped into a bucket of water, the hot brass bar does not become hotter while the water becomes colder. Heat flows from hot to cold, never the other way around. What is the best explanation for this phenomenon?
B. the second law of thermodynamics
A. the law of conservation of energy
B. the second law of thermodynamics
C. the law of calorimetry
D. the first law of thermodynamics
Which statement below best illustrates the first law of thermodynamics?
C. an increase in thermal energy is the sum of heat added to and work done on a body

A. it is the total heat added to a body without work done or added
B. Natural processes proceed in the direction that leads to an increase in entropy
C. An increase in thermal energy is the sum of the heat added to and work done on a body
D. None of these statements are correct
Which of the following is another way to think about the relationship between heat and temperature?
D. Heat is the energy transferred between objects at different temperatures. Temperature is the concentration of that energy
A. heat is work done on a cold object by a warmer object. Temperature is a measure of the amount of that work
B. heat is the average amount of thermal energy in a body. Temperature is the exact of amount of thermal energy in a body.
C. Heat is the average amount of thermal energy in a body. Temperature is the exact amount of thermal energy in a body.
D. Heat is the energy transferred between objects at different temperatures. Temperature is the concentration of that energy
In which of the following is there a decrease in heat?
D. when a gas does work on a piston
A. when ice melts to become water
B. when air is compressed
C. when water is stirred
D. when a gas does work on a piston
Which of the following statements best defines heat?
C. Heat is the total internal energy of a substance
A. heat is the difference in the internal kinetic energy and potential energy of an object
B. heat is the average kinetic energy of the atoms of a substance
C. Heat is the total internal energy of a substance
When a system's disorder is increased
A. less energy is available to do work
A. less energy is available to do work
B. more energy is available to do work
C. no energy is available to do work
D. no work is done
A ball is thrown against a brick wall. After the collision
B. the kinetic energy decreases, and the ball is capable of doing less work
A. the kinetic energy increases, and the ball is capable of doing more work
B. the kinetic energy decreases, and the ball is capable of doing less work
C. B. the kinetic energy increases, and the ball is capable of doing less work
D. B. the kinetic energy decreases, and the ball is capable of doing more work
When an egg is broken and scrambled, the entropy of the system
C. increases, and the total entropy of the universe decreases
A. increases, and the total entropy of the universe increases
B. decreases, and the total entropy of the universe increases
C. increases, and the total entropy of the universe decreases
D. decreases, and the total entropy of the universe decreases
When all the entropy changes in a process are included
C. the increases in entropy are always greater than the decreases
A. the increases in entropy are always less than the decreases
B. the increases in entropy are always equal to the decreases
C. the increases in entropy are always greater than the decreases
D. the increases in entropy are always greater than or less than the decreases
Imagine you could observe the individual atoms that make up a piece of matter and that you observethe motion of the atoms becoming more orderly. What can you assume about the system?
B. its entropy is decreasing
A. its entropy is increasing
B. its entropy is decreasing
C. it is gaining thermal energy
D. positive work is being done on the system
school office records are filed in folders in alphabetical order. The entropy of the system is
B. low
A. high
B. low
C. unchanged
D. constant
A tray of cookies is removed from a box. The entropy of the system is
A. high
A high
B. low
C. unchanged
D. constant
A glass beaker falls to the floor and breaks. The entropy of the system is
A. high
A. high
B. low
C. unchanged
D. constant
according to the second law of thermodynamics, the heat recieved by a heat engine operating in a complete cycle from a high-temperature reservoir
D. cannot be completely converted to work
A. must be completely converted to work
B. equals the entropy increase
C. can be completely converted to internal energy
D. cannot be completely converted to work
the requirement that a heat engine must give up some energy at a lower temperature in order to do work corresponds to which law of thermodynamics?
B. second
A. first
B. second
C. third
D. no law of thermodynamics
According to the second law of thermodynamics, which of the following applies for any process that can occur within an isolated system?
B. entropy increases
A. entropy remains constant
B. entropy increases
C. entropy decreases
D. entropy equals work done
Entropy is
D. the Law of Statistical Probability
A. the Law of Efficiency
B. the Law of Chaos
C. the Law of Order
D. the Law of Statistical Probability
Over several cycles, a refrigerator does 1.73 x 10^4 J of work on the refrigerant. The refrigerant removes 8.11 x 10^4 J by heat from the air inside the refrigerator. How much energy is transferred by heat from the refrigerator's inner compartment to the outside air?
D. 9.84 x10^4 J
A. 3.19 x10^4 J
B. 4.92 x10^4 J
C. 6.38 x10^4 J
D. 9.84 x10^4 J
An engine absorbs 2150 J of heat froma hot resevoir and gives off 750 J by heat to a cold reservoir during each cycle. How much work is done during each cycle?
B. 1400 J
A. 750 J
B. 1400 J
C. 2150 J
D. 2900
A heat engine performs 2000.0 J of net work while adding 5000.0 J of heat to the cold-temperature reservoir. What is the efficiency of the engine?
C. 0.400
A. 0.714
B. 0.600
C. 0.400
D. 0.286
A turbine exhausts 69400 J of energy added by heat when it puts out 21300 J of net work. What is the efficiency of the turbine?
D. 0.235
A. 3.26
B. 0.307
C. 0.693
D. 0.235
Which term below is used to describe a vibration?
C. amplitude
A. reflection
B. wavelength
C. amplitude
D. refraction
The primary purpose fo a wave is to
D. transfer energy
A. vibrate
B. move objects
C. identify motion
D. transfer energy
Waves can be either transverse or longitudinal. Which of the following examples is a longitudinal wave?
A. sound wave
A. sound wave
B. X-ray
C. water wave
D. ultraviolet ray
The amount of energy contained in mechanical waves and electromagnetic waves depends on certain aspects of the waves. The relationship is
A. mechanical, amplitude: electromagnetic, frequency
A. mechanical, amplitude: electromagnetic, frequency
B. A. mechanical, wavelength: electromagnetic, amplitude
C. A. mechanical, velocity: electromagnetic, frequency
D. A. mechanical, frequency: electromagnetic, wavelength
You aunt is just leaving the airport. The jet taking off must be making at least 145 dB of sound because it is loud. Identify the property of the sound measured in decibels.
B. intensity
A. pitch
B. intensity
C. frequency
D. hertz
The frequency of a series of waves is 5 Hz. The period of these waves is
D. 1/5 second
A. 1/25 second
B. 25 seconds
C. 5 seconds
D. 1/5 second
A surfer standing on the jetty is timing the waves. He finds that four waves go by in 20 seconds. Which of the following is the correct analysis of the situation?
C. the frequency is 1/5 wave per second
A. the frequency is 5 waves per second
B. The period is 1/5 second
C. the frequency is 1/5 wwave per second
D. the period is 4 seconds
Which of the following factors does not affect the speed of either mechanical or electromagnetic waves?
D. the amplitude fo the wave
A. the medium in which the wave is traveling
B. temperature
C. wavelength
D. amplitude
Which of the following will not transmit sound waves?
D. a vacuum
A. a gas
B. a solid
C. a liquid
D. a vacuum
Which statement is true about the speed of sound in different media?
C. the more dense the material, the greater the speed of sound as long as each material is elasticand at the same temperature
A. the speed of sound in a vacuum is faster than in air because there is no air resistance
B. the speed of sound increases with increasing altitude
C. the more dense the material, the greater the speed of sound as long as each material is elasticand at the same temperature
D. on eof the myths fostered by movies of the Old West was that one could hear an approaching train sooner by placing one's ear against the rail. This has no scientific basis.
The speed of sound waves depends on the properties of the medium in which they travel. Organize the following media in order of increasing speed of sound (wood, water, air, iron)
A. air, water, wood, iron
A. air, water, wood, iron
B. air, wood, water, iron
C. iron, wood, water, air
D. iron, water, wood, air
sound waves will not travel through a vacuum because sound waves
I. are mechanical
II. involve changes in pressure
III. are longitudinal
IV. involve changes in density

Which are true?
C. I, II, and IV
A. I and IV
B. II, III, and IV
C. I, II, and IV
D. I, II, and III
"Black light" is used to read the reentry stamp on your wrist in some amusement parks and is also used for sterilizing some surgical instruments. What is a more precise name for "black light?"
D. ultraviolet light
A. infrared rays
B. laser light
C. x-rays
D. ultraviolet light
One type of wave is an electro magnetic wave. Which of the following contains the correct set of characteristics of electromagnetic waves?
B. are transverse waves, need no medium to travel through, are both magnetic and electrical in nature
A. are longitudinal waves, can travel through a vacuum, move at constant speed regardless of medium
B. are transverse waves, need no medium to travel through, are both magnetic and electrical in nature
C. are transverse waves, travel at the speed of sound, need no medium
D. are longitudinal waves, formula f λ = v applies, can travel in a vacuum or medium
Which is not an example of an electromagnetic wave?
B. seismic wave
A. X-ray
B. seismic wave
C. microwave
D. radio wave
Which statement best describes the increase in pitch of a sound in the Doppler Effect?
C. the approaching waves are closer together
A. the approaching waves are traveling faster
B. the approaching waves are traveling more slowly
C. the approaching waves are closer together
D. The approaching waves are farther apart
If light is not polarized, and it passes through a lens that has vertical polarization, which type of light will not pass through the lens?
B. only light in a horizontal plane
A. only light in a vertical plane
B. only light in a horizontal plane
C. ultraviolet light passes through
D. red and yellow light will not pass thorugh
When two waves travel through the same medium at the same time, there can be either constructive or destructive interference when they meet. Which is the correct set of effects?
D. For the combined amplitude of two waves to be exactly zero, destructive interference has to occur, the waves have to be 180 degrees our of phase, and the waves must have equal magnitudes of amplitude
A. In constructive interference, the waves meet, pass through one another, and return to their original form; in destructive interference, the waves do not return to their original form
B. In constructive interference, the waves meet, pass through one another, and return to their original form except with a larger amplitude; destructive interference, the waves return to their original form except with a smaller amplitude
C. constructive and destructive interences occur only in mechanical waves
D. For the combined amplitude of two waves to be exactly zero, destructive interference has to occur, the waves have to be 180 degrees our of phase, and the waves must have equal magnitudes of amplitude
What happens to light when it strikes a glass surface?
D. the light rays are refracted. The amount of refraction depends upon the angle of incidence and the type of glass.
A. The waves are refracted. The amount of refraction depends upon whether the lass is clear or colored.
B. SOme light is reflected and some light is refracted.
The light rays merely pass through the glass, emerging at a reduced intensity, depending on the degree of color in the glass
D. the light rays are refracted. The amount of refraction depends upon the angle of incidence and the type of glass.
Which of the following is not a true statement concerning the functino of a battery in an electrical circuit?
C. to give all the electrons a negative charge
A. To supply energy to drive electrons through the circuit
B. to maintain a constant difference of potential between two points ina circuit
C. to give all the electrons a negative charge
D. to convert chemical energy to electrical energy
Find the resistance in a circuit where the appliedvoltage is 9V and the current is 3.6A.
C. 2.5 Ω
A. 4Ω
B. 1/4Ω
C. 2.5Ω
D. 0.4Ω
An electriv current involved the movement of
C. electrons
A. protons
B. positrons
C. electrons
D. negatrons

Here's a hint..if you pick B or D, you really shouldn't be in Physics.
Conor drops a magnet off the second story balcony. When Mary picks up the magnet, sherealizes that is no longer attracts metals. Mary and Conor conclude that
C. the collision with the ground knocked the spinning electrons out of alignment
A. the decrease in magnetic strength correponds to a decrease in potential energy
B. the friction with the air raised the temperature of the magnet and rearranged the magnetic domains.
C. the collision with the ground knocked the spinning electrons out of alignment
D. the collision with the ground broke the metallic crystalline structure
A current-carrying wire has a(n) ___________ field surrounding it.
C.magnetic
A. ionic
B. gravitational
C. magnetic
D. thermodynamic
Which of the following is an example of electromagnetic induction?
B. When a wire is moved through a magnetic field, an electric surrent is induced in the wire
A. When a strong permanent magnet is drawn along a piece of soft iron several times in the same direction, magnetism is induced in the soft iron
B. When a wire is moved through a magnetic field, an electric surrent is induced in the wire
C. If a bar magnet is encircled by a wire, a current will be induced in the wire.
D. if a wire is parallel to a bar magnet and then moved in a direction parallel to the bar, an electric current will be induced
Two wires carry equal currents and run parallel to each other. If the two currents are in the opposite directions, (a) where will the field from the two wires be larger than the field from either wire alone, and (b) will the wires repel or attract?
A. (a)at points between the two wires
(b) repel
A. (a)at points between the two wires
(b) repel
B. (a)only at a point halfway between the wires
(b) repel
C. (a)at points between the two wires
(b)attract
D. (a) only at a point halfway between the wires
(b) attract
Two charged particles are 4m apart. Object A has a charge of -2x10^-6 C, and Object B has a charge of -5x10^-5 C. If the charge on object A is increased to -6x10^-6C, then the electrical potential energy between the charges is
D. increased to 3 times its initial value
A. decreased to 1/9 of its initial value
B. decreased to 1/3 of its initial value
C. increased to 9 times its initial value
D. increased to 3 times its initial value
two charged objects are 1m apart. Object A has a charge of -1x10^-5 C and object B has a charge of -3x10^-4 C. If the distance between the objects is increased to 2m, then the electrical potential energy between the charged objects
C. decreases to 1/2 of its initial value
A. increases to 4 times its initial value
B. increases to 2 times its initial value
C. decreases to 1/2 its initial value
D. decreases to 1/4 o fits initial value
Two charged objects are 2m apart. One of the objects has acharge of +4x10^-5 C and the other object has a charge of +6x10^-5 C. If the distance between the objects is decreased to 0.5m, then the electrical potential energy between the objects
B. increases to 4 times its initial value
A. increases to 16 tiems its inital value
B. increases to 4 times its initial value
C. decreases to 1/2 of its initial value
D. decreases to 1/4 of its initial value
What is the electrival potential energy of a 36-C charge that is transferred through a potential difference of 180V?
B. 6480 J
A. 5 J
B. 6480 J
C. 5 V
D. 6480 V
The operating potential difference of a light bulb is 120V. The power rating of the bulb is 75W. Find the current in the bulb and the bulb's resistance.
D. 0.62, 190
A. 1.6, 190
B. 1.6, .021
C. 9000, 190
D. 0.62, 190
A color television has a power rating of 325W. Hhow much current does the set draw froma potential difference of 120V?
B. 2.7 A
A. 0.369 A
B. 2.7 A
C. 39000 A
D. 0.023 A
How much power is needed to operate a radio that draws 7.0 A of current when a potential difference of 115 V is applied across it?
D. 800 W
A. 0.609 W
B. 16.4 W
C. 5640 W
D. 800 W
A high-voltage transmission line carries 1.0 x10^3 A of current at 7.0 x 10^5 V for a distance of 160 km. The resistance in the wire is 0.30 ohms/km. What is the power dissipated due to resistive losses?
B. 4.8 x 10^7
A. 7.8 x 10^8 J
B. 4.8 x 10^7 J
C. 0.62 J
D. 2.0 x 10^6 J