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.
The United States entered World War II after the Japanese bombed the country's navy in Pearl Harbor on December 7, 1941. On December 7, 1941, the United States became active in World War II. The war had originally begun between countries in 1939 (Germany struck Poland), but after the Japanese had attacked the fleet in Pearl Harbor, Hawaii, the U.S. officially declared war on Japan a day later (December 8, 1941).