Exton and Shah measured that distance as 0.12 meters, or 0.12 meters per cycle. Multiplying something measured in âmeters per cycleâ by something in âcycles per secondâ will give a measurement in âmeters per second.â That's the wave's velocityâthe speed of light.
The US declared war on Japan (unanimously in the Senate, and 388 to 1 in the House of Representatives) on 8 December 1941 thus entering WWII. The declaration was in response tâ¦o the bombing of Pearl Harbor on 7 December 1941.
December 8, 1941 was the date of the US declaration of war, but in fact the US was at war on December 7, 1941 at about 7:55 AM when the Japanese attacked Pearl Harbor, Hawaii. The U.S entered World War 2, right after the Japanesse bombed the U.S. at Pearl Harbor. President Roosevelt was very anger with Japaneese empire, so he entered World W â¦ ar 2 to get back at the Japan Empire.