Template:Are You Sure/April 9: Difference between revisions
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• ... that | • ... that physicist and academic '''[[Thomas Johann Seebeck (nonfiction)|Thomas Johann Seebeck]]''' (9 April 1770 – 10 December 1831) discovered the thermoelectric effect, where a junction of dissimilar metals produces an electric current when exposed to a temperature gradient? | ||
• ... 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? | |||
• ... 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; that de Martinville managed to sell several phonautographs to scientific laboratories for use in the investigation of sound, proving useful in the study of vowel sounds; that the phonautographs initiated further research into tools able to image sound, such as Koenig's manometric flame? | |||
Latest revision as of 03:49, 9 April 2022
• ... that physicist and academic Thomas Johann Seebeck (9 April 1770 – 10 December 1831) discovered the thermoelectric effect, where a junction of dissimilar metals produces an electric current when exposed to a temperature gradient?
• ... 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?
• ... 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; that de Martinville managed to sell several phonautographs to scientific laboratories for use in the investigation of sound, proving useful in the study of vowel sounds; that the phonautographs initiated further research into tools able to image sound, such as Koenig's manometric flame?