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 USA were neutral at the starting point of ww2 - after the Japanese attack on the 7th of December 1941 they entered war, respectively japan had declared war, Germany and Italy followed on the 11th and the 12th of December doing the same.That's more than two years after the war had started.hey didn't they were attacked at Pearl Harbor and they wanted to get back at them.   The USA entered war after the Japanese attack on the 7th of December 1941... that's mo â¦ re than a year after the war had started.