In fact, this was accepted as the most accurate measurement of the speed of light for the next forty years, at which point Michelson measured it again. The next lecture is on the Michelson-Morley experiment to detect the aether.
The United States declared war on Germany on April 6, 1917. There was two major reasons. First off, the German U-Boats sank 3 passenger ships carrying US civilians and citizens.
September 1st, 1939, when Germany launched the invasion of Poland. Britain and France declared war on Germany on September 3, 1939, starting the War. September 1st, 1939, when Germany launched the invasion of Poland. Britain and France declared war on Germany on September 3, 1939, starting the War.