/en/stories/by-subject-area/physics/joule-and-energy/scientific-partnership-james-prescott-joule-william-thomson-and-the-mechanical-equivalent-of-heat
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/en/stories/by-subject-area/physics/joule-and-energy/the-hard-work-of-experimenting-james-prescott-joule-william-thomson-and-the-mechanical-equivalent-of-heat