A ship sails calmly across the sea..suddenly the ship splits in two with an explosion..sinks in the sea..a submarine over 1000 km slowly rises to the surface of the sea. It is not clear who first came up with the idea for the submarine, but the first submarine was built by a Dutch scientist, Cornelius,…
Aerial created ‘smoke curtains’ were deployed by the United States Army Air Forces and other services, used extensively in the South Pacific against the Japanese. Many types of aircraft used this equipment, but the RAF Bostons (Douglas A-20 Havoc) were the most consistent users.
Rifles are large, long-barreled guns that rotate the bullet through the barrel of the gun like a pump when fired. For this, there will be long strands inside the gun barrel. Due to these spirals, the bullet that spins (spinning) has a greater tendency to penetrate, and can also travel long distances with accuracy. This…
