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Joule is the original unit  for work,energy, or amount of heat in SI unit,wich is symbolized by ''J''     ,,while it can be express using the following:
1 J=Nm,  1 J = 1 Pascal meter cube ,  1J = 1 Ws
( 1 joule can be express as:  1  pascal meter cube,1 newton meter and many other)
1 5 1
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