Physics Reference Tables

Physics Reference Tables Physical Constant

Symbol

Acceleration due to gravity on Earth

g

9.8 m / s / s

Coulomb’s law constant

k

2 9.0  10 9 Nm2 C

Elementary charge

e

1.6  10 19 C

Electron rest mass

me

Gravitational constant

G

mp

Proton rest mass Speed of light in a vacuum

c

Speed of sound in air at STP

Value

9.11  10 31 kg 2 6.67  10 11 Nm2 kg

1.67  10 27 kg

3.00  108 m / s 331 m / s

The Index of Refraction for Common Substances Air

1.00

Alcohol

1.36

Corn Oil

1.47

Diamond

2.42

Glass, Crown

1.52

Glass, Flint

1.61

Glycerol

1.47

Quartz, Fused

1.46

Water

1.33

NCDPI Reference Tables for Physics (2012) Version 2

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Mechanics

Energy F = force

x v  t x f  x i  vt x f  x i  v it  1 at 2 2

a  v t

W  F x

a = uniform acceleration

ac = centripetal

P  W  Fv t

Fc = centripetal force

PE g  mgh KE  1 mv 2 2

Fg = weight v

2 f

2 i

 v  2ax

F= ma

Fg = mg

F 

Gm1m2 r2

p = mv J  F t 2 ac  vr

2 Fc  mv r

g = acceleration due to gravity on Earth G = gravitational constant

h = height k = spring constant

acceleration F = force

g = acceleration due to gravity on Earth

KE = kinetic energy m = mass P = power

PE g = gravitational F  kx

PE s  1 kx 2 2

potential energy

PE s = potential energy stored in a spring

J = impulse m = mass

t = time

p = momentum

v = velocity

r = radius or distance between centers

W = work x = position

t = time v = velocity x = position

NCDPI Reference Tables for Physics (2012) Version 2

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Electricity

F 

kq1q2 r2

V  IR

P  VI  I 2R  V R

d = distance between parallel plates

Series Circuits

Ee = electrical energy

It  I1  I2  I3  ...

E = electric field strength

Vt  V1  V2  V3  ...

F = force 2

Req  R1  R2  R3  ...

I = current k = Coulomb’s law constant Parallel Circuits

Ee Pt

P = power

p = transformer primary coil F kq E  e  2 q r

E  V d

Vt  V1  V2  V3  ...

q = charge r = radius or distance between centers

kq V  r

It  I1  I2  I3  ...

1  1  1  1  ... R eq R1 R2 R3

R = resistance

s = transformer secondary coil V = electrical potential or potential difference

VpIp  VsIs

NCDPI Reference Tables for Physics (2012) Version 2

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Mathematical Formulas



Wave Phenomena

a2  b2  c 2

T  1 f

c = speed of light in a vacuum

sin   a c

v  f

f = frequency

cos   b c

n  c v

n = index of refraction T = period

tan   a b Circumference of a circle = 2 r Area of a rectangle = length  width Area of a triangle = 1 base  height 2

NCDPI Reference Tables for Physics (2012) Version 2

n1 sin1  n2 sin 2

sin  c 

n2 n1

v = speed

  angle  c  critical angle

n1v1  n2v 2

of incidence

 = wavelength

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