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The first demonstration of the photovoltaic effect, by Edmond Becquerel in 1839, used an electrochemical cell. He explained his discovery in Comptes rendus de l'Académie des sciences, "the production of an electric current when two plates of platinum or gold immersed in an acid, neutral, or alkaline solution are exposed in an uneven way to solar radiation."
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Both the boat's name and her sponsor were announced by the Secretary of the Navy at a ceremony at the Washington Navy Yard on 9 January 2015. [6] Hyman G. Rickover ' s christening occurred on 31 July 2021, [ 7 ] and she was commissioned on 14 October 2023, during a ceremony at Naval Submarine Base New London , in Groton, Connecticut .
The early history of electric motorcycles is somewhat unclear. On 19 September 1895, a patent application for an "electrical bicycle" was filed by Ogden Bolton Jr. of Canton Ohio. [1] On 8 November of the same year, another patent application for an "electric bicycle" was filed by Hosea W. Libbey of Boston. [2]
General Dynamics Corporation (GD) is an American publicly traded aerospace and defense corporation headquartered in Reston, Virginia.As of 2020, it was the fifth-largest defense contractor in the world by arms sales, and fifth largest in the United States by total sales. [2]
Specifically, many applicants that receive initial denials based on background check returns face waits of six to eight months to complete the process to obtain a TWIC. Over 10,000 applicants out of the 1.5 million port workers could not work for an average of 69 days because they had not obtained a TWIC by the implementation date. [11]
Lake Georgetown is a reservoir on the north fork of the San Gabriel River in central Texas in the United States.Lake Georgetown is a U.S. Army Corps of Engineers reservoir formed on the San Gabriel by the North San Gabriel Dam, which is located about three miles west of Georgetown, Texas.
Yachts are recreational boats Three different types of boats. Boating is the leisurely activity of travelling by boat, or the recreational use of a boat whether powerboats, sailboats, or man-powered vessels (such as rowing and paddle boats), focused on the travel itself, as well as sports activities, such as fishing or waterskiing.