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MCAT Things > Physics > Flashcards

Physics Flashcards

1
Q

Torque

A

T = rFsin(theta)

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2
Q

Hydrostatic Pressure

A

Psub = pgh

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3
Q

Equivalents of Pressure

A

1 atm
760 mmHg
10^5 Pascals
760 Torr

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4
Q

Density

A

p = m/v

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5
Q

Specific Gravity

A

SG = p of fluid / p of water

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6
Q

Absolute Pressure

A

Pabsolute = Phydrostatic + Patmospheric

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7
Q

Gauge Pressure

A

Pgauge = Psystem - Patmospheric

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8
Q

Percent Submersion

A

% submerged = [(density of object) / (density of liquid)] * 100

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9
Q

Buoyant Force

A

Fbuoyant = pVg

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10
Q

Volume of Fluid Displaced

A

Vdisplaced = (mass of object) / (density of fluid)

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11
Q

Pascal’s Law

A

(F1 / A1) = (F2 / A2)
W = F1d1 = F2d2

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12
Q

Pythagorean Theorem

A

a^2 + b^2 = c^2
c = sqrt(a^2 + b^2)

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13
Q

Kinematic Equation 1

A

d = 1/2(vi + vf)t

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14
Q

Kinematic Equation 2

A

vf = vi + at

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15
Q

Kinematic Equation 3

A

delta(x) = (vi)(t) + 1/2(at^2)

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16
Q

Kinematic Equation 4

A

vf^2 = vi^2 + 2(a)(delta(x))

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17
Q

Newton’s First Law

A

If velocity is constant:
Fnet = 0

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18
Q

Newton’s Second Law

A

Fnet = ma

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19
Q

Newton’s Third Law

A

F(AB) = -F(BA)

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20
Q

Center of Mass

A

xcenter = (m1x1 + m2x2 + … + mkxk) / (m1 + m2 + … + mk)

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21
Q

Static Friction

A

Fmax = mu(s)N

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22
Q

Kinetic Friction

A

Fkinetic = mu(k)N

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23
Q

Gravitational Formula

A

Fgrav = G((m1m2) / r^2)

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24
Q

Centripetal Acceleration

A

a = (v^2) / r

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25
Q

Centripetal Force

A

Fc = (mv^2) / r

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26
Q

Hooke’s Law

A

Fspring = -kx

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27
Q

Work

A

W = |F|dcos(theta)

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28
Q

Power

A

P = W / delta(t)

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29
Q

Kinetic Energy

A

KE = 1/2(mv^2)

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30
Q

Potential Energy

A

PEgrav = mgh

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31
Q

Elastic Potential Energy

A

PEelastic = 1/2(kx^2)

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32
Q

Conservation of Energy

A

Keinitial + PEinitial = KEfinal + PEfinal

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33
Q

Work-Energy Theorem

A

W = delta(KE) = KEfinal - KEinitial

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34
Q

Work (Pressure-Volume Curve)

A

W = P * delta(V)

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35
Q

Kinetic Energy of Particle

A

KE = 1/2(mv^2)rms

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36
Q

Kinetic Energy of a Particle

A

KE = 3/2(kB)T

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37
Q

Root Mean Square of Velocity

A

v(rms) = sqrt(3RT / Mm)

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38
Q

Celsius to Fahrenheit

A

C = (F - 32) * 5/9

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39
Q

Fahrenheit to Celsius

A

F = (C * 9/5) + 32

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40
Q

First Law of Thermodynamics

A

delta(U) = Q - W

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41
Q

Thermal Expansion 1

A

delta(L) = alpha(L) * L * delta(T)

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42
Q

Thermal Expansion 2

A

delta(V) = alpha(V) * V * delta(T)

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43
Q

Ideal Gas Law

A

PV = nRT

n = 6 x 10^23

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44
Q

Pressure

45
Q

Poiseuille’s Law

A

Q = ((pi)(t^4)(delta(P)) / (8(nu)(L))

46
Q

Bernoulli’s Law

A

P1 + 1/2pv1^2 + pgh1 = P2 + 1/2pv2^2 + pgh2

47
Q

Continuity Equation

A

v1A1 = v2A2

48
Q

Pitot Tube

A

Pstag - Pstatic = 1/2pv^2

49
Q

Resistance

A

R = p(l / A)

50
Q

Conductance

A

G = sigma(A / l)

51
Q

Coulomb’s Law

A

F = (kq1q2) / r^2

52
Q

Electric Field

A

E = F / q = kQ / r^2

53
Q

Electric Potential Energy

A

U = (kQq) / r

54
Q

Electric Potential (Voltage)

A

V = U / q = kQ / r

55
Q

Ohm’s Law

56
Q

Power

A

P = IV = (I^2)R = (V^2) / R

57
Q

Current in Series

A

Itotal = I1 = I2 = … = In

58
Q

Voltage in Series

A

Vsource = V1 + V2 + … + Vn

59
Q

Resistance in Series

A

Rtotal = R1 + R2 + … + Rn

60
Q

Current in Parallel

A

I total = I1 + I2 + … + In

61
Q

Voltage in Parallel

A

Vtotal = V1 = V2 = … = Vn

62
Q

Resistance in Parallel

A

1 / Rtotal = (1 / R1) + (1 / R2) + … + (1 / Rn)

63
Q

Capacitance

A

C = Q / V

C is capacitance in Farads (F)
Q is charge in Coulombs (C)
V is voltage in Volts (V)

64
Q

Capacitance

A

C = epsilon(A / d)

65
Q

Electric Field Between Capacitor Plates

66
Q

Capacitance in Series

A

1 / Ctotal = (1 / C1) + (1 / C2) + … + (1 / Cn)

67
Q

Capacitance in Parallel

A

Ctotal = C1 + C2 + … + Cn

68
Q

Magnetic Field Around a Wire

A

B = (mu * I) / (2 * pi * r)

69
Q

Magnetic Force on a Charge

A

Fb = qvBsin(theta)

70
Q

Magnetic Force on a Wire

A

Fb = ILBsin(theta)

71
Q

Period of a Mass on a Spring

A

T = 2 * pi * sqrt(m / k)

72
Q

Period of a Pendulum

A

T = 2 * pi * sqrt(L /g)

73
Q

Velocity of a Wave

A

v = lambda * f

74
Q

Speed of Sound

A

Vsound = sqrt(B / p)

75
Q

Decibel Level

A

dB = 10log(I / I0)

76
Q

Doppler Effect

A

f’ = f0 ((vsound + vobserver) / (vsound + vsource))

77
Q

Standing Wave for a String or Pipe Open at Both Ends

A

lambda = 2L / n

78
Q

Standing Wave for a Pipe Closed at One End

A

lambda = 4L / n(odd)

79
Q

Energy of an Electromagnetic Wave

A

E = hf = hc / lambda

E = energy J
h = Planck constant = 6.626 x 10^-34 J/s
f = frequency = c/wavelength = 3x10^8 m/s/wavelength m = s^-1

80
Q

Refractive Index

A

n = c / v

n=index
c = 3 x 10^8 m/s (speed of light in vaccum)
v = phase velocity of light in m/s

81
Q

Snell’s Law

A

n1sin(theta1) = n2sin(theta2)

82
Q

Single-Slit Diffraction

A

Asin(theta) = m * lambda

83
Q

Double-Slit Diffraction Maximum

A

Dsin(theta) = n * lambda

84
Q

Double-Slit Diffraction Minimum

A

Dsin(theta) = (n + 1/2) * lambda

85
Q

Thin Lens Equation

A

(1 / f) = (1 / o) + (1 / i)

86
Q

Magnification

A

m = -(i / o)

87
Q

Power of a Lens

A

P = 1 / f (can be in diopters)

88
Q

Mass-Energy Equivalence

89
Q

Photoelectric Effect

A

KEmax = Eincident - Ework

90
Q

Rydberg Equation

A

(1 / lambda) = R((1 / n1^2) - (1 / n2^2))

91
Q

Alpha Decay

A

(AZ)X —> (A - 4)(Z - 2)Y + Helium nucleus

92
Q

Beta-Minus Decay

A

(AZ)X —> (A)(Z + 1)Y + electron

93
Q

Beta-Plus Decay

A

(AZ)X —> (A)(Z - 1)Y + positron

94
Q

Gamma Decay

A

(AZ)X* —> (AZ)X + high energy radiation

95
Q

Electron Capture

A

(AZ)X + electron —> (A)(Z - 1)Y

96
Q

Exponential Decay

A

n = n0 * e^(-lambda * t)

97
Q

Half-Life

A

t(1/2) = 0.693 / lambda

98
Q

Radioactive Decay Law

A

N(t) = N (1/2) ^ (t/T)

T = half life

99
Q

Power or work

A

P = W/T

W = P X T

T = time

100
Q

power units

A

Watt
= Joule / sec
=kg / (m^2 x s^3)

101
Q

Work units

A

Joule
=Nm
=kg x m/s^2

102
Q

Power consumed

A

P = mgh/time

103
Q

velocity

A

=distance/time

104
Q

Energy with voltage and capacitance

A

E = 1/2 x C x V^2

C= capacitance in F
V=volts in V
E= J

105
Q

resistivity

A

resistivity = 1/conductivity

106
Q

current is

A

charge (C) / time (s) AKA Ampere

107
Q

1 L

108
Q

area of a circle

MCAT Things (6 decks)

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