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.
Since Japan had actually attacked the United States, Germany did not actually have to â¦ declare war. Through the lend-lease program, the United States was also giving support to Great Britain, against whom Germany was at war; so the United States was definitely aiding a country that Germany was at war with.dolf Hitler declared war on the U.S. a few days after the Japanese attacked Pearl Harbor. It's hard to figure out why he decided to do this since there was almost no chance the U.S. would declare war on Germany for some time.