Answer :
Final answer:
James Joule is the scientist whose experiments supported the first law of thermodynamics.
Explanation:
The scientist whose experiments supported the first law of thermodynamics was James Joule. Joule's experiments demonstrated the conservation of energy, which is the basis of the first law of thermodynamics. In one of his famous experiments, Joule showed that mechanical work could be converted into heat energy, thus providing evidence for the law of energy conservation.
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