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EQUATIONS

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Speed and acceleration:

where:

v is velocity

x is displacement (or distance)

t is time

a is acceleration

Uniformly accelerated motion:

where:

v is final velocity

u is initial velocity

x is displacement (or distance)

t is time

a is acceleration

Momentum and force:

where:

p is momentum

m is mass

F is force

Δ is change in

Circular motion:

where:

ω is angular velocity

v is velocity

T is period

r is radius

F is force

m is mass

Work and energy:

where:

g is gravitational field strength (9.81 N/kg)

W is work

PE is potential energy

KE is kinetic energy

m is mass

v is velocity

h is height

Δ is change in

F is force

Power and efficiency:

where:

P is power

Δ is change in

F is force

W is work

v  is velocity

t is time

Stress and strain:

where:

A is area

e is extension

l is length

F is force

Current electricity:

where:

Q is charge

I is current

V is voltage

R is resistance

Є is the electro-motive force (e.m.f)

Capacitors:

where:

C is capacitance

d is distance

V is voltage

A is area

d is distance

E is energy

Radioactivity:

where:

I is intensity of radiation

E is energy

m is mass

T1/2 is half-life

c is light's speed (299 792 485 m/sec)

λ is wavelength

N is number of radioactive atoms

Simple harmonic motion:

where:

T is period

l is length of pendulum's string

x is displacement moved by pendulum

g is gravitational field strength

ω is angular velocity

v is velocity

a is acceleration

m is mass

k is spring stifness

Waves:

where:

f is frequency

s is fringe separation

λ is wavelength

D is distance to screen

w is slit separation

d is grate spacing

c is velocity of wave

Refraction:

where:

n is refractive index

c is speed of light in a vacuum

v is speed of light in material

θ1 is angle of incidence

θ2 is angle of refraction

Photons and duality:

where:

Ek is kinetic energy

E is energy

is frequency

p is momentum

h is Planck's constant

Φ is work function for metal

Magnetism:

where:

Φ is flux

F is force

Q is charge

v is velocity

μ is the permeability of free space (constant)

n is number of turns divided by length of coil

B is field flux density

I is current

l is length of wire

Induced Current:

where:

N is the number of turns of a coil

 is the electro-motive force (e.m.f)

L is the self-inductance (constant)

A.c. and transformers:

where:

N/I/Vp is primary number of turns/current/voltage of transformer

N/I/Vs is secondary number of turns/current/voltage of transformer

r.m.s. is root mean square

X is reactance

w is angular frequency

C is capacitance

Gravitation:

where:

g is gravitational strength

G is universal constant of gravitation

V is gravitational potential

Thermodynamics:

where:

c is specific heat capacity

l is specific latent heat

Q is amount of heat transferred

T is temperature

U is internal energy

W is work done by a system

k is Boltzman' constant

Gases:

where:

p is pressure

V is volume

N is number of particles

c is average speed of particles

n is number of moles in a gas

R is universal molar gas constant

Electrostatics:

where:

F  is force

Q is charge

r is distance between 2 charged objects

ε0 is permittivity of free space

E is energy

V is voltage

d is distance moved by charge

ΔPE is change in potential