Samuel Gompers' Own Account of the Fight for the 8-Hour Day. My earliest impression of the meaning of the eight-hour day came to me in my first home in New York City. Long after our neighbors had gone to work in the morning at eight o'clock the bell in John Roach's shipyard announced the beginning of the day's work. As practically all other workers had been at work at least one or two hours, the bell told a significant story.
Andrew has 510+ answers and in. World War II. The Japanese Type 93 torpedo was far and away the best torpedo of the war. The Type 93 had an incredibly long range (40 kilometres), an incredibly high speed (96 kph) and a very large warhead (490 kg).
The speed of sound is the distance travelled per unit time by a sound wave propagating through an elastic medium. The SI unit of speed is the metre per second (m/s). In dry air at 20 Â°C, the speed of sound is 343.2 metres per second (1,126 ft/s). This is 1,236 kilometres per hour (768 mph; 667 kn), or a kilometre in 2.914 s or a mile in 4.689 s.