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).
Supersonic speed is a rate of travel of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 Â°C (68 Â°F) at sea level, this speed is approximately 343.2 m/s, 1,125 ft/s, 768 mph, 667 knots, or 1,235 km/h. Speeds greater than five times the speed of sound (Mach 5) are often referred to as hypersonic.