Template:Are You Sure/April 9: Difference between revisions
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• ... that '''[[Édouard-Léon Scott de Martinville (nonfiction)|Édouard-Léon Scott de Martinville]]''' (25 April 1817 – 26 April 1879) made the oldest known recording of an audible human voice, a visual recording of audio data; and that it was first be played back in 2008? | • ... that '''[[Édouard-Léon Scott de Martinville (nonfiction)|Édouard-Léon Scott de Martinville]]''' (25 April 1817 – 26 April 1879) made the oldest known recording of an audible human voice, a visual recording of audio data; and that it was first be played back in 2008? | ||
• ... that mathematician and electrical engineer '''[[Charles Proteus Steinmetz (nonfiction)|Charles Proteus Steinmetz]]''' promoted the development of alternating current, formulating mathematical theories which will advanced the expansion of the electric power industry in the United States? | • ... that mathematician and electrical engineer '''[[Charles Proteus Steinmetz (nonfiction)|Charles Proteus Steinmetz]]''' (9 April 1865 – 26 October 1923) promoted the development of alternating current, formulating mathematical theories which will advanced the expansion of the electric power industry in the United States? | ||
Revision as of 14:29, 8 April 2021
• ... that physicist and academic Thomas Johann Seebeck (9 April 1770 – 10 December 1831) discovered the thermoelectric effect?
• ... that Édouard-Léon Scott de Martinville (25 April 1817 – 26 April 1879) made the oldest known recording of an audible human voice, a visual recording of audio data; and that it was first be played back in 2008?
• ... that mathematician and electrical engineer Charles Proteus Steinmetz (9 April 1865 – 26 October 1923) promoted the development of alternating current, formulating mathematical theories which will advanced the expansion of the electric power industry in the United States?