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My MCAT Cards > Equations > Flashcards

Equations Flashcards

1
Q

couphysics

kinematics equations

A
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2
Q

physics

newton’s first law

A
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3
Q

physics

newton’s second law

A
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4
Q

physics

newton’s third law

A
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5
Q

physics

centre of mass

A
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6
Q

physics

friction

A

N = perpendicular to contact surface, mg or mgcosθ on ramp

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7
Q

physics

gravitational force

A
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8
Q

physics

centripetal acceleration

A
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9
Q

physics

centripetal force

A
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10
Q

physics

hooke’s law

A
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11
Q

physics

torque

A
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12
Q

physics

work

A

+ve when F in same direction as movement
-ve when F opposes movement
W = 0 when force is perpendicular

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13
Q

physics

power

A
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14
Q

physics

kinetic energy

A
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15
Q

physics

gravitational potential energy

A
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16
Q

phyiscs

elastic potential energy

A
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17
Q

physics

conservation of energy

A
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18
Q

physics

work energy theorem

A
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19
Q

physics

pressure-volume curve

A

WORK is the area under a P-V curve
+ve W = gas expands, work done BY gas
-ve W = gas compressed, work done TO gas

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20
Q

physics

pulleys + mechanical advantage

A

W = F x d
machine DECREASES force
so distance must INCREASE
Work done stays the SAME

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21
Q

physics

root mean square of velocity

A
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22
Q

physics

first law of thermodynamics

A

+ve Q = heat flows in, -ve Q = heat flows out
+ve U = increasing temp, -ve U = decreasing temp
+ve W = work done by system (expansion)

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23
Q

physics

ideal gas law

A
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24
Q

physics

density

A

1mL = 1cm^3
1000L = 1m^3

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25
Q

physics

specific gravity

A

less than 1 = less dense, will FLOAT

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26
Q

physics

pressure

A

1x10^5 Pa = 760 torr = 1atm

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27
Q

physics

absolute pressure

A

so P increases as you get deeper

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28
Q

physics

hydrostatic pressure

A

pressure from static fluid
conceptually like GPE

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29
Q

physics

dynamic pressure

A

pressure from moving fluid
conceptually like KE

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30
Q

physics

absolute pressure

A
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31
Q

physics

buoyant force

A

use density of FLUID
volume of fluid displaced = volume of submerged object

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32
Q

physics

pascal’s law

A

both pressure and volume moved on both sides is equal
can also be –> A1d1 = A2d2

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33
Q

physics

poiseuille’s law

A

ΔP ∝ 1/r^4
increase r, BIG decrease in P

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34
Q

physics

bernoulli’s law

A

fluid rises up HIGH where P is high (large Area, smaller Velocity - less dynamic pressure, so static is higher)

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35
Q

physics

if SPEED of fluid increases:
effect on pressure

A

dynamic pressure = increases
static pressure = decreases
bio Q’s usually refer to pressure as hydrostatic

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36
Q

physics

continuity equation

A

conservation of mass, fluids flow faster when A is smaller

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37
Q

physics

kelvin + celcius

A

K = C + 273
0C = 273K
delta T is the SAME

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38
Q

physics

thermal expansion: length

A

how does length change? a LOT (looks like eq)

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39
Q

physics

thermal expansion: volume

A

coefficient of VOLUME expansion = 3X length coefficient
aV = 3X aL

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40
Q

physics

state functions

A

PaPa HUGS TV
pressure (P), density (p), enthalpy (H), internal energy (U), free energy (G), entropy (S), temp (T), volume (V)

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41
Q

physics

heat gained/lost

A

q = mcΔT

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42
Q

physics

electric field

A

where q is a test charge (+ convention)
E = N/C

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43
Q

physics

coulomb’s law

A

electrostatic force between 2 charges (magnitude)

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44
Q

physics

electric potential energy

A

still N x m = Joules
work required to move a charge here from **infinity **
EPE high when 2 like charges brought CLOSE
EPE high when 2 opposite charges SEPARATED more

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45
Q

physics

electric potential

A
  • VOLTAGE
  • ratio of charge’s EPE to the magnitude of charge itself Volts, scalar
46
Q

physics

voltage

A

ΔV = Vb - Va
potential difference

47
Q

physics

magnetic field around a wire

A
  • use RHR (thumb = I, fingers = field)
  • for a LOOP wire, same eq without pi (same RHR)
48
Q

physics

magnetic force on a charge

A
  • so when angle = 0 or 180 (parallel/antiparallel) there is NO FORCE force highest when angle is 90
  • direction of force = RHR (fingers=field, thumb = velocity of charge/current of wire, palm=force)
  • if charge is (-), force direction is opp (back of hand)
49
Q

physics

magnetic force on a current carrying wire

A
  • same RHR but thumb = current
50
Q

physics

resistance

A

directly proportional to length
inversely proportional to area

51
Q

physics

ohm’s law

A
52
Q

physics

power (circuits)

A

power dissipated by each resistor

53
Q

physics

current in series

A
54
Q

physics

voltage in series

A
55
Q

physics

resistance in series

A
56
Q

physics

current in parallel

A
57
Q

physics

voltage in parallel

A
58
Q

physics

resistance in parallel

A
59
Q

physics

capacitance

A
60
Q

physics

capacitance: equation 1

A
61
Q

physics

capacitance: equation 2

A
62
Q

physics

E field between capacitor plates

A
63
Q

physics

capacitance in series

A
64
Q

physics

capacitance in parallel

A
65
Q

physics

speed of wave

A
66
Q

physics

speed of sound

A
67
Q

physics

decibel level

A
68
Q

physics

doppler effect

A
  • mnemonic: observer = detector (d), and source (s) — d / s = dom / sub ;)
  • ignore the observer +/-, observer NEVER MOVES
  • so becomes v / (v +/- Vs)
  • subtract source speed when moving towards
69
Q

physics

intensity of sound

A

I = A^2
I = 1 / d^2
so… **intensity directly prop. to area squared (high area = high intensity)
intensity inversely prop. to distance squared (high distance from source, low intensity)

70
Q

physics

strings and open pipes: wavelength and freq. formulas

A
71
Q

physics

closed pipe: wavelength and freq. formulas

A

n (harmonic) only ODD INTEGERS

72
Q

physics

energy of EM wave

A
73
Q

physics

refractive index

A
74
Q

physics

snell’s law

A
75
Q

physics

single-slit diffraction

A
76
Q

physics

double-slit diffraction MAXIMUM

A
77
Q

physics

double-slit diffraction MINIMUM

A
78
Q

physics

thin lens equation

A
79
Q

physics

magnification

A
80
Q

physics

power of a lens

A
81
Q

physics

mass-energy equivalence

A
82
Q

physics

alpha decay

A
83
Q

physics

beta-minus decay

A
84
Q

physics

beta-plus decay

A
85
Q

physics

gamma decay

A
86
Q

physics

electron capture

A
87
Q

physics

exponential decay

A
88
Q

physics

half life

A
89
Q

chem

formal charge

A
90
Q

chem

percent yield

A
91
Q

chem

equilibrium

A
92
Q

chem

Q vs Keq

A
93
Q

chem

heat

A
94
Q

chem

gibbs free energy

A
95
Q

chem

gibbs free energy of a reaction: compared to standard

A
96
Q

chem

gibbs free energy at equilibrium

A
97
Q

chem

parial pressures

A
98
Q

chem

boyles law

A
99
Q

chem

charle’s law

A
100
Q

chem

gay-lussac’s law

A
101
Q

chem

molality

A
102
Q

chem

arrhenius equation

A
103
Q

chem

rate of reaction

A
104
Q

chem

pH

A
105
Q

chem

henderson hasselbalch equation

A
106
Q

chem

cell potential Ecell

A
107
Q

chem

nernst equation

A
108
Q

chem

electroplating: moles of metal

A
109
Q

chem

michaelis-menten kinetics

A
110
Q

chem

beer-lambert law

A

My MCAT Cards (12 decks)

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