Joule | Wikipedia audio article
Channel: wikipedia tts
Date: 08/12/2018

This is an audio version of the Wikipedia Article:
Joule


00:02:05 1 Usage
00:02:42 2 Confusion with newton metre
00:04:05 3 Practical examples
00:05:37 4 Multiples
00:05:42 5 Conversions
00:09:48 6 Watt second
00:11:39 6.1 Photography
00:11:44 7 See also
00:11:53 8 Notes and references
00:12:18 undefined
00:13:55 undefined
00:14:07 undefined



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SUMMARY
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The joule (; symbol: J) is a derived unit of energy in the International System of Units. It is equal to the energy transferred to (or work done on) an object when a force of one newton acts on that object in the direction of its motion through a distance of one metre (1 newton metre or N⋅m). It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).In terms firstly of base SI units and then in terms of other SI units:

  
    
      
        
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    {\displaystyle {\text{J}}={\frac {{\text{kg}}{\cdot }{\text{m}}^{2}}{{\text{s}}^{2}}}={\text{N}}{\cdot }{\text{m}}={\text{Pa}}{\cdot }{\text{m}}^{3}={\text{W}}{\cdot }{\text{s}}={\text{C}}{\cdot }{\text{V}},}
  where kg is the kilogram, m is the metre, s is the second, N is the newton, Pa is the pascal, W is the watt, C is the coulomb, and V is the volt.
One joule can also be defined as:

The work required to move an electric charge of one coulomb through an electrical potential difference of one volt, or one coulomb-volt (C⋅V). This relationship can be used to define the volt.
The work required to produce one watt of power for one second, or one watt-second (W⋅s) (compare kilowatt-hour –  3.6 megajoules). This relationship can be used to define the watt.