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Joule

A joule is the amount of work done when a force of one Newton is applied through a distance of one meter.

1 Joule = 1 Newton-meter = 1 kg-m²/s²

1 Joule = 1*10⁷ erg = 0.7376 ft-lb = 0.2389 cal = 6.242*10¹⁸ eV