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Physics and Math > Kaplan > Flashcards

Kaplan Flashcards

1
Q

Acceleration

A

A vector quantity describing a change in velocity over the elapsed time during which that change occurs

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2
Q

Adhesion

A

A type of attractive force that molecules of a liquid fell toward molecules of another substance, such as in the adhesion of water droplets to a glass surface

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3
Q

Alpha Decay

A

A nuclear reaction in which an α - particle is emitted

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4
Q

Archimedes’ Principle

A

States that a body that is fully or partially immersed in a liquid will be buoyed upwards by a force that is equal to the weight of the liquid displaced by the body

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5
Q

Bernoulli’s Equation

A

Equation describing the conservation of energy in fluid flow

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6
Q

Beta Decay

A

A nuclear reaction in which a β-particle (e-) is emitted

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7
Q

Binding Energy

A

The energy that holds the protons and neutrons together in the nucleus, defined by the equation e=mc^2, where m is the mass defect and c is the speed of light in a vacuum

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8
Q

Capacitance

A

A measure of a capacitor’s ability to store charge at a given voltage; calculated by the ratio of the magnitude of charge on one plate to the voltage across the two plates
- SI unit : farad (F)

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9
Q

Capacitor

A

An electric device is used in circuits that is composed of 2 conducting plates separated by a short distance; these devices store electric charge

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10
Q

Center of Mass

A

The point on some object or body where all of its mass is considered to be concentrated. In a uniform gravitational field, this is also the center of gravity

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11
Q

Centripetal Acceleration

A

The acceleration of an object traveling in a circle that points toward the center of the circle. In uniform circular motion, it is equal in magnitude to the velocity squared by the radius of the circle traversed

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12
Q

Cohesion

A

A type of attractive force felt by liquid molecules toward each other. It is responsible for surface tension

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13
Q

Conduction

A

Form of heat transfer where energy is transferred by molecular collisions or direct contact between 2 objects

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14
Q

Conductor

A

A material in which electrons can move with relative ease

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15
Q

Conservation of Mechanical Energy

A

States that when only conservative forces act on an object and work is done, energy is conserved

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16
Q

Conservative Force

A

A force that does not cause dissipation of mechanical energy from a system. As such, the work is performed independent of the path taken
- Gravity and electrostatic forces

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17
Q

Continuity Equation

A

States that the mass flow rate of fluid must remain constant from one cross-section of a tube to another

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18
Q

Convection

A

Form of heat transfer where a heated fluid transfers energy by bulk flow and physical motion over another object, or a cooled fluid absorbs energy by the same means

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19
Q

Coulomb’s Law

A

The law describing the electrostatic force that exists between 2 charges, q1 and q2, that are separated by a distance r

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20
Q

Current

A

A flow of charge per time. The flow of charge is motivated by a potential difference (voltage)
- SI unit: ampere (A)

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21
Q

Density

A

A scalar quantity defined as mass per unit volume

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22
Q

Dielectric

A

An insulating material placed between the 2 plates of a capacitor; used to increase capacitance

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23
Q

Diffraction

A

The spreading-out effect of light when it passes through a small, slit opening

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24
Q

Direct Relationship

A

A relationship between variables such that an increase in one variable is associated with an increase in the other

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25
Q

Dispersion

A

The phenomenon observed when white light is incident on the face of a prism and emerges on the opposite side with all its wavelengths split apart. forming the visible spectrum

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26
Q

Displacement

A

A vector quantity describing the straight-line distance between an initial and a final position of some particle or object

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27
Q

Doppler Effect

A

When a source emitting a sound and a detector receiving the sound move relative to each other, the perceived frequency f’ is less than or greater than the actual frequency emitted f, depending on whether the source and detector move toward or away from each other

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28
Q

Elastic Potential Energy

A

The energy associated with stretching or compressing a spring
- SI unit: joules (J)

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29
Q

Electric Circuit

A

A conducting pathway that contains one or more voltage sources that drive an electric current along that pathway and through connected passive circuit elements

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30
Q

Electric Field

A

The electrostatic force that a source charge would exert on a positive test charge q0 divided by the magnitude of that test charge. Represented by electric field lines-imaginary lines that show the direction in which a positive test charge is accelerated by the coulombic force due to the electric field of a source charge
- SI unit: N/C or V/m

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31
Q

Electric Potential

A

The amount of electric potential energy per unit charge; the work required to bring a positive test charge q0 from infinity to within an electric field of another positive source charge, Q. divided by that test charge’s magnitude
- SI unit: volt (V)

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32
Q

Electric Potential Energy

A

The amount of work required to bring a test charge q0 from infinity to a point within the electric field of some source charge, Q
- SI unit: joule (J)

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33
Q

Electric Power

A

The rate at which the energy of flowing charges through a resistor or other device is dissipated
- SI unit: watt (W)

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34
Q

Electromagnetic Spectrum

A

The full range of frequencies and wavelengths for electromagnetic waves broken down into the following regions (in descending order of wavelength): radio, infrared, visible light, ultraviolet, x-ray, and gamma ray

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35
Q

Electromagnetic Waves

A

When an electric field is changing, it causes a change in a magnetic field and vice versa, resulting in the propagation of a wave containing an electric and a magnetic field that are perpendicular to each other

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36
Q

Heat of Transformation

A

The amount of heat required to change the phase of a substance
- Solid-liquid change —> heat of fusion
- Liquid-gas change —> heat of vaporization

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37
Q

Heat Transfer

A

The movement of thermal energy toward a state of thermodynamic equilibrium
- Higher temperature to lower temperature

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38
Q

Image

A

The apparent location of an object perceived through a lens or mirror
- Real and virtual

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39
Q

Gravity

A

A ubiquitous attractive force existing between any two objects, with magnitude directly proportional to the product of the 2 masses observed and inversely proportional to the square of their distance from each other

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40
Q

Half-Life

A

The amount of time it takes for 1/2 of a radioactive sample to decay

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41
Q

Snell’s Law

A

Equation describing the angle of refraction for a light ray passing from one medium to another

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42
Q

Speed of Light

A

The speed of electromagnetic waves traveling though a vacuum

43
Q

Spherical Mirror

A

Have the appearance of a curved surface that is either concave or convex

44
Q

Sound Level

A

The loudness of a sound, measured in decibels (dB)

45
Q

Speed

A

A scalar quantity describing the distance traveled divided by the time required to travel that distance
- SI unit: meters per second (m/s)

46
Q

Insulator

A

A material in which electrons cannot move freely

47
Q

Index of Refraction

A

Ratio of the speed of light in a vacuum to the speed of light through a medium

48
Q

Interference

A

When superimposed waves are in phase, their amplitudes add (constructive). When superimposed light waves are out of phase, their amplitudes subtract (destructive)

49
Q

Inverse Relationship

A

A relationship between variables such that an increase in one variable is associated with a decrease in the other

50
Q

Kinetic Energy

A

The energy of an object in motion
- SI unit: joules (J)

51
Q

Kirchhoff’s Junction Rule

A

States that the sum of currents directed into a node or junction point in a circuit equals the sum of the currents directed away from that point

52
Q

Kirchhoff’s Loop Rule

A

States that the sum of the voltage sources in a circuit loop is equal to the sum of the voltage drops along that loop

53
Q

Laminar Flow

A

The smoothest type of liquid flow through a tube wherein thin layers of liquid slide over one another

54
Q

Law of Reflection

A

States that when light waves strike a medium, the angle of incidence Θi is equal to the angle of reflection Θr

55
Q

Lens

A

A transparent device with a curvature that causes light to bend as it passes through

56
Q

Logarithm

A

A mathematical function that is the inverse of the exponential function
- Common or natural

57
Q

Magnification

A

A dimensionless value
- negative denotes inverted images
- positive denotes upright image

58
Q

Mass

A

A scalar quantity used as a measure of an object’s inertia
- SI unit: kilogram (kg)

59
Q

Mass Defect

A

The difference between an atom’s atomic mass and the sum of the masses of its protons and neutrons

60
Q

Newton’s First Law

A

States that if no net force acts on an object, its velocity is constant

61
Q

Gravitational Potential Energy

A

The energy of an object due to its height above a given datum
- SI unit: joules (J)

62
Q

Normal Force

A

Perpendicular component of the force caused when two surfaces push against each other (N)

63
Q

Nonconservative Force

A

A force that dissipates mechanical energy from a system

64
Q

Newton’s Second Law

A

States that an object will accelerate in proportion to the net force acting on it

65
Q

Newton’s Third Law

A

States that if one object exerts a force on another, the other object exerts a force on the first that is equal in magnitude but opposite in direction

66
Q

Gauge Pressure

A

The pressure above and beyond atmospheric pressure

67
Q

Frequency

A

Number of cycles per second measured in units of Hz

68
Q

Frictional Force

A

An antagonistic force that points parallel and opposite in direction to the direction of movement of an object

69
Q

Gamma Decay (γ)

A

A nuclear reaction in which high-energy photons are emitted

70
Q

First Law of Thermodynamics

A

States that the change in internal energy of a system is equal to the heat transferred into the system minus the work done by the system

71
Q

Focal Length

A

The distance between the focal point and the mirror or lens

72
Q

Force

A

A vector quantity describing the push or pull on an object
- SI unit: newton (N)

73
Q

Electromotive Force

A

The impetus for current flow created by a voltage source
- Measured in volts (V)

74
Q

Equipotential Lines

A

Concentric circles emanating from a source charge that cross its electric field lines perpendicularly

75
Q

Exponential Decay

A

A decrease in the amount of substance N at an exponential rate

76
Q

Right-Hand Rule

A

A common method used to determine the direction of a vector created as the product of 2 vectors
- Thumb points in direction of 1st vector, fingers point in direction of 2nd vector, palm points in direction of resultant

77
Q

Rotational Equilibrium

A

State where the sum of the torques acting on a body is zero, giving it no net angular acceleration

78
Q

Scalar

A

A quantity that has magnitude but no direction

79
Q

Radiation

A

Form of heat transfer where the energy is carried by electromagnetic waves
- Can be carried out in a vacuum

80
Q

Resistance

A

The natural tendency of a conductor to block current flow to a certain extent resulting in loss of energy or potential
- SI unit: ohm (Ω

81
Q

Resistivity

A

Intrinsic property of a conductor used to measure its resistance
- SI unit: ohm-meter (Ω-m)

82
Q

Potential Difference

A

The difference in electric potential between 2 points in an electric field
- Also called voltage

83
Q

Power

A

The rate at which work is done
- SI unit: watt (W)

84
Q

Pressure

A

The force per unit area
- SI unit: pascal (Pa)

85
Q

Plane Mirror

A

A mirror in which incident light rays remain parallel after reflection, always producing a virtual image that appears to be the same distance behind the mirror as the object is in front of the mirror

86
Q

Plane-Polarized Light

A

Light that has been passed through a polarizing filter, allowing only the transmission of waves containing electric field vectors parallel to the lines of the filter

87
Q

Positron Decay (β +)

A

A nuclear reaction in which a positron is emitted

88
Q

Pascal’s Principle

A

States that when a pressure is applied to one point of an enclosed fluid, that pressure is transmitted in equal magnitude to all points within that fluid and to the walls of its container

89
Q

Photoelectric Effect

A

The phenomenon observed when the light of a certain frequency causes a metal to emit electrons

90
Q

Ohm’s Law

A

Law stating that the voltage drop across a resistor is proportional to the current flowing through it
- Measured in volts (V)

91
Q

Vector

A

A quantity that has both magnitude and direction

92
Q

Velocity

A

A vector quantity describing an object’s displacement over the elapsed time
- SI unit: meters per second (m/s)

93
Q

Viscosity

A

The measure of internal friction in a fluid, often denoted by η

94
Q

Total Internal Reflection

A

The condition in which the incident angle of light traveling from a medium with a high n to a medium with a low n is greater than the critical angle
- No light refracted

95
Q

Translational Equilibrium

A

State where the sum of the forces acting on an object is zero, giving it no net acceleration

96
Q

Turbulent Flow

A

Type of liquid flow that occurs when the linear flow speed in a tube exceeds the critical speed
- Vortices and high resistance

97
Q

Second Law of Thermodynamics

A

States that for any process, the entropy of the universe either increases or remains constant

98
Q

Zeroth Law of Thermodynamics

A

States that 2 objects that are in thermal equilibrium with a third object are also in thermal equilibrium with each other

99
Q

Torque

A

A force creating rotation about an axis
- SI unit: newton meter (N.m)

100
Q

Wave Speed

A

The speed of a wave

101
Q

Wavelength

A

A quantity equal to the distance between any 2 equivalent consecutive points along a wave
- SI unit: meter (m)

102
Q

Work

A

Energy transfer in which a force is applied to change the energy of a system
- SI unit: joule (J)

103
Q

Work-Energy Theorem

A

States that the net work performed on an object is related to its change in energy

Physics and Math (13 decks)

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