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The steam engine could generate power and transmit it to a machine.
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It was a light bulb, but not the style of modern ones we have today.
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The first oil well in the U.S., could produce oil and gas in sufficient quantities which makes it economically viable.
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The first battery invented consisted of pairs of copper and zinc discs piled on top of each other, separated by a layer of cloth or cardboard soaked in brine.
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The Hoover Dam was opened to the public.
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The discovery of nuclear fission was the main process to generating nuclear energy.
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The first silicon solar cell invented was an electrical device that converts the energy of light directly into electricity.
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The Geothermal Energy Association is formed. The association includes U.S. companies that develop geothermal resources worldwide for electrical power generation and direct-heat uses.