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# Physics Formulas

### (SOME) FORMULAS

DescriptionFormula / Other
PART 1 SI BASIC UNITS
Length Metre (m)
Mass Kilogram (kg)
Time Second (s)
Electric Current Ampere (A)
Amount of Substance Mole (mol)
Temperature (absolute) Kelvin (K)
Luminous intensity Candela (cd)
PART 2 SI DERIVED UNITS
Area Square Metre (m^2)
Volume Cubic Metre (m^3)
Density Kilogram per Cubic Metre (kg m^(-3))
Velocity Metre per Second (m s^(-1))
Force Newton (N) or (kg m s^(-2))
Energy Joule (J) or (N m)
Power Watt (W) or (J s^(-1))
Charge Coulomb (C) or (A s)
Potential difference Volt (V) or (J C^(-1))
Electric field Volt per Metre (V m^1)
Electric resistance Ohm (Ω) or (V A^(-1))
Capacitance Farad (F) or (C V^(-1))
Magnetic field Tesla (T) or (Wb m^(-2))
Illumination Lux (lx) or (lm m^(-2))
PART 3 PREFIXES
Giga- G (10^9)
Mega- M (10^6)
Kilo- k (10^3)
Centi- c (10^(-2))
Milli- m (10^(-3))
Micro- μ (10^(-6))
Nano- n (10^(-9))
PART 4 PHYSICAL CONSTANTS
Acceleration due to Gravity (on Earth) g = [9.8 m s^(-2)] or [9.8 N kg-1]
Equatorial radius of the Earth 6.4 × 10^6 m
Speed of Light (in vacuum) c = 3.00 × 10^8 m s^(-1)
Charge on Electron e = 1.60 × 10^(-19) C
Proton mass 1.67 × 10^(−27) kg
Neutron mass 1.67 × 10^(−27) kg
Electron mass 9.11 × 10^(−31) kg
Avogadro's number 6.02 × 10^(23) mol^(−1)
Planck's constant h = 6.626 × 10^(-34) J s OR 4.136 × 10^(-15) eV s
Gravitational constant G = 6.67 × 10^(-11) N m^2 kg^(-2)
Speed of Sound (dry air) 640 m s^(-1) (20 oC)
Mass of the Earth 6.0 × 10^24 kg
Mass of the Sun 2.0 × 10^30 kg
Mass of the Moon 7.3 × 10^22 kg
PART 5 GREEK LETTERS
Δ (upper case) Delta ("a change in" a quantity)
ε Epsilon (electromotive force (EMF); electrical permittivity)
Φ Phi (magnetic flux)
λ Lambda (wavelength)
μ Mu (micro; magnetic permeability)
ν Nu (frequency)
π Pi (used in circular functions: the ratio of a circle's circumference to its diameter)
θ Theta (angles)
ρ Rho (resistivity)
σ Sigma (stress)
τ Tau (torque)
ω (lower case) Omega (angular velocity)
Ω (upper case) Omega (electrical resistance)
Created by: Doctor Moreau