completely detached from family, friends and the rest of the world, submarine missions are planned in such a way that the crew keeps ‘rotating’, meaning that no single crew must bear the burden of staying underwater for ‘too long’. ...
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根据文章开头的“Here’s how to make a model submarine(潜水艇) that dives(潜水) and comes up from underwater like a real one.”可知这是制作能潜水并从水下像真实潜艇一样上来的模型潜艇的方法。故选B。 (2)题详解: 细节理解题。根据“You’ll need”部分可知需要“Plastic bottle, Tape(胶), ...
@ Anon1369- I think it depends on the type of submarine you are getting on. I have a buddy who went to the navy and was stationed on a submarine. He said the quarters were very small, and they would stay under water for long periods of time. I would think this would require seriou...
How does a ship stay afloat on water?Density:In science, density is the ratio of the mass to the volume. For an object having irregular shape, we can solve its density by taking its mass by weighing and dividing by the local gravity. Then to measure its volume, we can submerge the ...
Ted Briggs, a survivor of the sunken British battleship HMS Hood, reported being sucked underwater. So did a crew member aboard the Japanese fishing boat that was accidentally sunk by a U.S. submarine in 2001. To be on the safe side, it might be a good idea to get as far away ...
Humboldt squid are the smallest of the three, about 6 to 7 feet (1.8 to 2.1 meters) long and 100 pounds (45.3 kg). How do these marine animals get so big? The most common explanation is a phenomenon called deep-sea gigantism. The theory suggests that over time, small shallow-water ...
Because long rails pose design challenges, most rail guns use strong currents -- on the order of a million amps -- to generate tremendous force. The projectile, under the influence of the Lorentz force, accelerates to the end of the rails opposite the power supply and exits through an apert...
hunter-killer submarine. Unlike conventional submarines that India operates which need to surface to charge their batteries often - sometimes as frequently as 24 hours - INS Chakra can stay under as long as it wants. Its ability to stay underwater is restrained only by hu INS Chakra是俄国做,...