The submarine became a potentially viable weapon with the development of the Whitehead torpedo, designed in 1866 by British engineer Robert Whitehead, the first practical self-propelled or 'locomotive' torpedo.[20] The spar torpedo that had been developed earlier by the Confederate States Navy was considered to be impracticable, as it was believed to have sunk both its intended target, and probably H. L. Hunley, the submarine that deployed it. In 1878, John Philip Holland demonstrated the Holland I prototype.
Discussions between the English clergyman and inventor George Garrett and the Swedish industrialist Thorsten Nordenfelt led to the first practical steam-powered submarines, armed with torpedoes and ready for military use. The first was Nordenfelt I, a 56-tonne, 19.5-metre (64 ft) vessel similar to Garrett's ill-fated Resurgam (1879), with a range of 240 kilometres (130 nmi; 150 mi), armed with a single torpedo, in 1885.
A reliable means of propulsion for the submerged vessel was only made possible in the 1880s with the advent of the necessary electric battery technology. The first electrically powered boats were built by Isaac Peral y Caballero in Spain (who built Peral), Dupuy de Lôme (who built Gymnote) and Gustave Zédé (who built Sirène) in France, and James Franklin Waddington (who built Porpoise) in England.[21] Peral's design featured torpedoes and other systems that later became standard in submarines.[22][23]
Giving into the demands of an aggressive nation in order to end tensions. Britain and France appeased Hitler because they did not want to start a war even though he was conquering and annexing countries. Hope this helps!
He meant that his anger was fuel for him to continue protesting and peacefully disobeying. I agree with this because anger gives a reason to support a cause.
Esta condición mantiene la estabilidad política en el país, lo que tiene un buen impacto en el proceso de crecimiento y desarrollo.
Se elimina la posibilidad de reelección inmediata del presidente en Chile para mantener la estabilidad en el país. De acuerdo con la actual Constitución que se implementa en 1980, el presidente cumple un mandato de cuatro años y la reelección inmediata está prohibida en el país. Esta condición es buena para la estabilidad política de un país y reduce el impacto negativo en la economía de un país que conduce al crecimiento y desarrollo de un país y su gente.
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