Physics equations/Collection of equations

Organization: These equations are under reorganization:

Part II equations waiting to be converted into templates

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Math

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circumference, area, volume, elements

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Circumference and area of circle:  ;    

Area and volume of sphere:  ;    

 

 

 

Trigonometry

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Vector dot product

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Electromagnetism

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from https://en.wikiversity.org/w/index.php?title=Electromagnetism_Formulae&oldid=1121007 https://en.wikiversity.org/w/index.php?title=Maxwell%27s_Equations&oldid=790747

Before Maxwell's Equations

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Electric field and voltage (or potential):    

Electric potential due to point charges:  


Magnetic field:  

Maxwell's equations

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Gauss' Law relating electric field to charge:  

 

 

 

 

 

to discard

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Maxwell's equations integral form

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permittivity and magnetic permeability

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Force equations

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Current and circuits

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https://en.wikibooks.org/w/index.php?title=Electronics/Formulas&oldid=2348180

 

 

 

 

 

 

 

 

 

resistivity

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   where   

SI units

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See https://en.wikipedia.org/w/index.php?title=SI_base_unit&oldid=579303285

SI units

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7 Base units (https://en.wikipedia.org/w/index.php?title=International_System_of_Units&oldid=584747081)

  1. metre m length
  2. kilogram kg mass
  3. second s time
  4. ampere A electric current
  5. kelvin K thermodynamic temperature (0°C = 273.15 K)
  6. Mole molamount of substance (6.02214×1023)
  7. candela cd luminous intensity (typically 18 mW)

Derived units

  • radian  [rad ] called: angle. units: 1 = m/m
  • steradian [ sr ] called: solid angle. units: 1 = m2/m2
  • hertz [ Hz ] called: frequency. units: s−1
  • newton [ N ] called: force, weight. units: kg⋅m⋅s−2
  • pascal [ Pa ] called: pressure, stress. units: N/m2 = kg⋅m−1⋅s−2
  • joule [ J ] called: energy, work, heat. units: N⋅m = kg⋅m2⋅s−2
  • watt [ W ] called: power, radiant flux . units:J/s = kg⋅m2⋅s−3
  • coulomb [ C ] called: electric charge or quantity of electricity. units: s⋅A
  • volt  [V ] called: voltage (electrical potential difference), electromotive force . units:W/A = kg⋅m2⋅s−3⋅A−1
  • farad [ F ] called: electric capacitance . units:C/V = kg−1⋅m−2⋅s4⋅A2
  • ohm [ Ω ] called: electric resistance, impedance, reactance. units: V/A = kg⋅m2⋅s−3⋅A−2
  • siemens [ S ] called: electrical conductance. units: A/V = kg−1⋅m−2⋅s3⋅A2
  • weber [ Wb ] called: magnetic flux. units: V⋅s = kg⋅m2⋅s−2⋅A−1
  • tesla [ T ] called: magnetic field strength. units: Wb/m2 = kg⋅s−2⋅A−1
  • henry [ H ] called: inductance . units:Wb/A = kg⋅m2⋅s−2⋅A−2
  • degree [ Celsius °C] called: temperature relative to 273.15 K. units: K
  • lumen [ lm ] called: luminous flux . units:cd⋅sr cd
  • lux [ lx ] called: illuminance . units:lm/m2 = m−2⋅cd
  • becquerel [ Bq] called: radioactivity (decays per unit time) . units: s−1
  • gray [ Gy ] called: absorbed dose (of ionizing radiation). units: J/kg = m2⋅s−2
  • sievert [ Sv] called: equivalent dose (of ionizing radiation) . units:J/kg = m2⋅s−2
  • katal [ kat] called: catalytic activity . units:s−1⋅mol


Advanced Physical Constants

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speed of light   =2998×108m·s−1


Planck constant=  =6.626 × 10−34 J·s

reduced Planck constant=  = 1.0546 × 10−34 J·s


more constants that need sorting:

Atomic mass constant =  =1.660 538 921(73) × 10−27 kg

Avogadro's number =  =6.022 141 29(27) × 1023 mol−1 (number of atoms in a mole)

Boltzmann constant =  =1.381 × 10−23 J·K−1 (converts Kelvins to Joules)


gas constant =  =8.31446 J·K−1·mol−1 (converts Kelvins to Joules per mole)


Stefan–Boltzmann constant =  =5.670 373(21) × 10−8 W·m−2·K−4 (black body power per unit area is  

Wien displacement law constant (needs to be better defined in terms of maximum lambda and temperature)   4.965 114 231... =2.897 7721(26) × 10−3 m·K


References

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