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.
American World War 2 Planes. American World War 2 planes werenât seen in combat at the beginning of the conflict. Two years after the outbreak of WW2, the USA declared war to the Axis powers after the bombing of Pearl Harbor by the Japanese aviation on December 7, 1941.