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MCAT Content Review > Physics Equations > Flashcards

Physics Equations Flashcards

1
Q

Photon energy

A

E=hf=hc/(wavelength)

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2
Q

Venturi effect

A

Oxygen pressure is the sum of the oxygen static pressure P and the oxygen flow pressure (density x volume-squared/2)

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3
Q

Acceleration

A

velocity/time with changing direction

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4
Q

Uniform motion - find a

A

d=1/2(v0+v)t

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5
Q

Uniform motion - find d

A

v=v0+at

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6
Q

Uniform motion - find v

A

d=v0t+1/2at2

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7
Q

Uniform motion - find v0

A

d=vt-1/2at2

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8
Q

Uniform motion - find t

A

v2=v02+2ad

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9
Q

Gravitational acceleration

A

10m/s2

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10
Q

Projectile motion - horizontal displacement

A

x=v0t

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11
Q

Projectile motion - vertical displacement

A

y=v0t+1/2(-g)t2

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12
Q

Projectile motion - horizontal velocity

A

vx=v0 (constant)

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13
Q

Projectile motion - vertical velocity

A

vy=v0+(-g)t

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14
Q

Projectile motion - horizontal acceleration

A

ax=0

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15
Q

Projectile motion - vertical acceleration

A

ay=-g

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16
Q

Newton’s Second Law

A

Fnet=ma

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17
Q

Newton’s Law of Gravitation

A

Fgrav=G(M1M2/r2)

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18
Q

Gravitational Acceleration

A

g=G(M1/r2)

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19
Q

Kinetic Friction

A

Ff= μk F(normal)

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20
Q

Static Friction

A

Ff= μs F(normal)

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21
Q

Parallel Force due to Gravity

A

F=mgsinΘ

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22
Q

Perpendicular Force due to Gravity

A

F=mgcosΘ

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23
Q

Center of Mass for Point Masses

A

X=(m1x1)+(m2x2)+(…)/m1+m2+m3

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24
Q

Centripetal Acceleration

A

a=v2/r

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25
Centripetal Force
F=ma=mv2/r
26
Torque
τ=rFsinΘ
27
Work
W=FdcosΘ
28
Power
W/t
29
Kinetic Energy
KE=1/2mv2
30
Work-Energy Theorem
W=ΔKE
31
Potential Energy
PE=mgh
32
Total Mechanical Energy
E=KE+PE=1/2mv2
33
Mechanical Advantage
MA=F(resistance)/F(effort)
34
Momentum
p=mv
35
Impulse
J=Δp=Δmv=FΔt
36
Angular Momentum
L=rvm
37
Efficiency (%)
W(output)/E(input)
38
Work done by gas piston
W=PΔV
39
Change in Internal Energy
ΔE=Q-W
40
Change in absolute temperature of an ideal gas
Constant Volume - Q=nCT
41
Density
ρ=m/v
42
Specific Gravity
ρ(substance)/ρ(water)
43
Weight
w=mg
44
Pressure
F/A
45
Hydrostatic Gauge Pressure
P(gauge)=ρ(fluid)gD
46
Total Hydrostatic Pressure
P(total)=P(surface/gas)+P(gauge)
47
Archimedes Principle
F(bouy)=ρ(fluid)V(sub)g
48
Apparent weight of submerged object
apparent weight = w (object) - F (bouy)
49
Pascal's Law
F1/A1=F2/A1
50
Flow Rate
f=Av
51
Continuity Equation
A1V1=A2V2
52
Bernoulli's Equation (Ideal Fluid)
P1 + 1/2ρv2 + ρgy = P2 + 1/2ρv2 + ρgy
53
Floating Object Relationship
V (sub)/V=ρ(obj)/ρ(flu)
54
Toricelli's Result
v(efflux) = √ 2gD
55
Stress
Stress=F/A
56
Strain
Strain =ΔL/L0
57
Hooke's Law
Stress=modulus x strain
58
Tension or compression
ΔL=FL0/EA
59
Shear
X=FL0/AG
60
Coulomb's Law
F(elec)=k (lQl lql/r2)
61
Electric field due to point charge (Q)
E=k (lQl/r2)
62
Electric force by field
F=qE
63
Electric Potential
EP=k(Q/r)
64
Change in Electrical PE
ΔPE = qΔEP = qV
65
Work done by electric field
W= - ΔPE
66
Change in KE
ΔKE = - ΔPE = W (e field)
67
Current
I=Q/t
68
Resistance
R= ρ (L/A) ρ=resistivity
69
Ohm's Law
V=IR
70
Resistors in series
R= R1 + R2 + R3...
71
Resistors in parallel
1/R = 1/R1 + 1/R2...
72
Power of circuit
P=IV=I2R=V2/R
73
Charge of parallel plate capacitors
Q=CV
74
Capacitance (no diaelectric)
C=ε(A/d)
75
Capacitance (with diaelectric)
C=KC(without)=Kε(A/d)
76
Electric field in parallel plate capacitor
V=Ed
77
Stored potential energy in capacitor
PE=1/2 QV = 1/2 CV2 = Q2/2C
78
Capacitors in parallel
C=C1 + C2 + ...
79
Capacitors in series
1/C=1/C1+ 1/C2 +...
80
Magnetic force on moving charge (q)
F=-qvB F= lqlvBsinΘ sinΘ is angle between v and B
81
Hooke's law (spring)
F=-kx
82
Elastic potential energy
PE = 1/2kx2
83
Spring-block oscillator frequency
f=(1/2π)(√k/m)
84
Simple pendulum frequency
f=(1/2π)(g/l)
85
Period/frequency
T=1/f
86
Wave equation
v=λf
87
Standing-wave (harmonic) wavelength
λn=2L/n (n=1, 2, 3) λn=λ1/n
88
Standing-wave (harmonic) frequencies
fn=(v/2L)n fn=nf1
89
Velocity of sound
v=√B/ρ
90
Intensity
I=Power/Area
91
Intensity level
β=10 log (I/I0)
92
Harmonic frequency (sound) - open end
f=nv/2L
93
Harmonic frequency (sound) - closed end
f=nv/4L
94
Harmonic wavelength (sound) - open end
λ=2L/n
95
Harmonic wavelength (sound) - closed end
λ=4L/n
96
Doppler effect
f= (v+/-vD)/(v+/-vS)fs
97
Frequency of a beat
f= lf1 - f2l
98
Index of refraction
n=c/v
99
Law of reflection
Θ1=Θ1`
100
Law of refraction (Snell's law)
n1sinΘ1=n2sinΘ2
101
Mirror-Lens equation
1/o + 1/i = 1/f
102
Focal length
f = R/2
103
Magnification
m = -i/o
104
Lens power
P = 1/f P(combination) = P1 + P2
105
Photoelectron Energy
KEmax = hf - energy potential
106
Stopping Voltage
-eVstop=KEmax

MCAT Content Review (13 decks)

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