James Prescott Joule (; 24 Disamba 1818 <unk> 11 Oktoba 1889) ya kasance masanin kimiyyar lissafi ne na Ingilishi, masanin ilmin lissafi da kuma mai shayarwa, wanda aka haife shi a Salford, Lancashire. Joule yayi nazarin yanayin zafi, kuma ya gano dangantakarsa da aikin injiniya (duba makamashi). Wannan ya haifar da dokar kiyaye makamashi, wanda hakan ya haifar da ci gaban dokar farko ta thermodynamics. An sanya sunan SI na makamashi, joule, bayan shi. Tambaya: Wace doka ce ta farko ta samo asali daga juyin halitta na dokar kiyaye makamashi?
dokar thermodynamics