Bell: The generally recognized inventor of the telephone is Bell. He applied for a telephone patent at the U.S. Patent Office on February 14, 1876.
Volt: Alexander Count Alessandro Giuseppe Antonio Anastasio Volta (February 18, 1745 - March 5, 1827) is famous for his invention of the voltaic pile in 1800. Later he was created an earl.
Newton:
In mechanics, Newton clarified the principles of conservation of momentum and angular momentum, and proposed Newton's laws of motion [1]. In optics, he invented the reflecting telescope and developed a theory of color based on observations of prisms diverging white light into the visible spectrum. He also formulated the laws of cooling and studied the speed of sound.
In mathematics, Newton shares the credit of developing calculus with Gottfried Wilhelm Leibniz. He also proved the generalized binomial theorem, proposed "Newton's method" to approach the zero point of a function, and contributed to the study of power series.
In economics, Newton proposed the gold standard system.
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