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1843 in science
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==Physics== * [[James Prescott Joule]] experimentally finds the [[mechanical equivalent of heat]].<ref>{{cite journal|title=On the Mechanical Equivalent of Heat|last=Joule|first=J. P.|journal=[[Proceedings of the Royal Society|Abstracts of the Papers Communicated to the Royal Society of London]]|year=1843|volume=5|page=839|doi=10.1098/rspl.1843.0196|doi-access=free}}</ref> * [[Ohm's acoustic law]] is proposed by German physicist [[Georg Ohm]].
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