how does a submarine work?
112480
Hello, Every subamarine contains ballast tanks that when the needs to sink  it takes in water, due to the pressure and weight the submarine sinks and goes underwater and is propelled through propellars. When it needs to rise to suface, it lets the water out slowly and air comes and fills its ballest tanks and the submarine comes to surface. \n\nThats' it works, more info, check the web
194412
go to http://en.wikipedia.org/wiki/Wankel_engine#How_it_works
89807
1. you need firstly to have a total density equivalent to that of fresh or salt water(for whatever purposed required)\nthen bouyancy will be stable/maintained \nthis will make a suitable start\n2. forge a shape suitable to make the sub hydrodynamic, this will enable the prototype to glige through the water \n3. have fun!
368047
Are you refering to communication to submarines.\n\nCheck out the ELF project, extremely low frequency telecommunications.
713781
Many roles. In general, subs are ASW platforms. They hunt enemy subs.  Sub also scout ahead  of a task force. They can monitor a enemy beach, land special forces, mine the enemies harbor, Tap undersea cables for intel. They in the past have also been used for lifeguard duty (rescue of downed Carrier pilots) Former president Bush's rescue in WW2 is a prime examle of such a operation.
902905
Ok. this is simple. u need to know about buyoancy, like how air is lighter than water. all you really got do is put some small weights (ex. paper clips, rocks, etc) in the bottle. have it so that it will just barely float. then cut a hole to the side and insert the end of a tube in it. make sure it is water tight. then place it in a tub. it shold float, when you suck on the end of the tube, it should take some of the air out making it less buoyant, and therefore it will sink. there are also many other ways to do this that will make it function more like a real submarine like putting the bottle with weights inside and somehow add pressure to the the outside of the tube to compact the air inside the bottle, causing it to sink. good luck on your project
826107
Nuclear reactors are basically heat engines. As uranium fissions, the breaking apart of atoms releases energy, much of it in the form of heat, which can then be used to do work. In a nuclear-powered submarine, reactor heat produces steam to drive the turbines that provide the submarine's actual power. The development of compact, safe, and highly reliable pressurized water reactors for naval use in the early 1950s was the major technological achievement that made nuclear-powered submarines possible.\n\nHow Reactors Work\nNaval pressurized-water reactors include a primary coolant system and a secondary coolant system. The primary system circulates water, which is pressurized to keep it from boiling, in a closed loop. As water passes through the reactor, it is heated. It then goes through the steam generator, where it gives up its heat to generate steam in the secondary system. Finally, it flows back to the reactor to be heated again. Inside the steam generator, heat energy is transferred across a watertight boundary to the secondary system, also a closed loop. The unpressurized water in the secondary system turns to steam when heated. The steam, in turn, flows through the secondary system to the propulsion turbines, which turn the propellers, and to the turbine generators, which supply electricity. As it cools, it condenses to water and is pumped back to the steam generator.
521447
This is same question as "a small stone is dropped from sky". here instead of air there is water, but logic is same. Water resistance plays a major role. Before hitting the floor the pebble achieves the terminal velocity, then moves with constant speed towards the ocean floor. Weight of the stone does not play a role, but shape of the stone does for terminal velocity value. A spherical stone is less resistant that any other shape. [I am assuming it rotates randomly while travelling down, so not considering submarine shape:)].\n\nHow long is still an unanswered question, due to missing data.
846920
Well, it should be close to what I did as a nuclear power qualified Sailor on US Submarines.  There is a small space called maneuvering that provides a place for three men to control the reactor, electric plant and the steam turbines.  The engine room has several other watch standers that monitor the turbines, generators, air conditioning, evaporators, switchgear and other stuff.
1183589
some types of guns work underwater
363584
Most US Navy subs can do at least 40 MPH submerged. I don't think you could hang on, even if you could survive the impact. And they have a little thing called sonar which keeps people from being able to sneak up on them unobserved. The sonar puts out pulses that can travel a hundred miles and return, they are pretty powerful. Used in 'antipersonnel mode', it would be like getting hit with a sledgehammer.\n\nWhat you need is a 'density shunt', a powered suit of armor of material MUCH denser than water (and you), like osmium. It is a rare metal, so this would be expensive. But in theory, with an osmium diving suit, the sonar pulses would travel through the suit, around you,and would affect you much less than if you were in contact with the water. \n\nTo get hold of the sub, instead of suction cups, I'd recommend a grappling hook with a cable, loop the cable around the conning tower. They'd have to have guys come out and physically cut the cable before they could get rid of you. \n\nWatch out for those SEALS, though. You might need to use some exploding harpoons from a CO2 powered spear gun to keep them from stopping you.... uh, just what is it you were planning anyhow...? Nothing bad, right, I mean, you're a loyal American, aren't you...? I hope I didn't just give away the weaknesses of the Navy. Listen, don't tell this to anybody else, OK?
344788
hey man, dont worry ill help. first of all our given:\nh=280m\nsg=1.03\ngc=9.7m/s^2\n\nreq'd Pressure(absolute)\n----------------------------------------------\nsol'n:\nfor DENSITY of subs:\nformula\nSpecific Gravity=density of subs/density of water\ndensity of subs=1.03 x 1000(density for water)\ndensity of subs=1030 kg/m^3\n\nFOR PRESSURE GAGE:\nP(gage)=Vh\nP(gage)=density x gravitational constant x height\nP(gage)=1030 x 9.7 x 280\nP(gage)=2,797,480 Pa\n\nFOR PRESSURE ABSOLUTE:\nP(abs)=P(gage) - P(atm)\n\nwhy minus? bec. the submarine is pressurized, meaning its vacuumed\n\nP(abs)=2,797,480 Pa - 1atm(101.325x10^3 Pa)\nP(abs)=2,696,155 Pa\n\nconvert Pa to Kpa\n=2,696,480 /1000\n=2,696.155 Kpa\n\nconvert to bar\n=2696.155kPa x (1.01325 bar / 101.325 kPa)\n=26.96155 bar\n\ndont mind the others, they dont even know how to answer this simple question. They just want to earn points!
894097
This is what causes a surface current. \nAs winds blow across the ocean, there is friction between the wind and the water. Some of the energy of the wind is transferred to the water to make waves which travel across the surface of the ocean and some of the energy is transferred into surface currents.\nWhen currents run into something, like a continent, they must change direction. The current must turn right or left to form boundary currents or flow below the surface of the ocean to form a subsurface current.
61489
The length of time a nuclear submarine can remain submerged depends upon the amount of provisions stored onboard for the crew.  Storage space reserved for food is limited.  Extra food can be kept anywhere where there is room.  Often, the pathways of berthing are used for canned goods (one walks atop food for several weeks before it's all gone).\n\nOther than the limitation of food, the only other thing that would prevent a nuclear submarine from staying submerged would be air quality.\n\nAn atmosphere monitoring system tests the air (percentages of 02, CO2, CO, etc.) constantly to assure breathable air, while a carbon dioxide scrubber removes Co2 gas; a COH2 burner burns hydrogen (byproduct of the burn is water) and removes CO by passing it over a bed of lithium carbonate.  The scrubbers and the burner work quite well at maintaining safe levels.\n\nWhen the oxygen levels get close to a minimum for safe levels, either the boat ventilates (ship rises to periscope depth and outside air is sucked in with a blower; stale air is exhausted overboard) or it is decided that an oxygen bleed (venting oxygen into the ship from high pressure banks) should be started.  If an oxygen bleed is started, however, it can only continue for a limited time due to the increase in pressure it causes inside the ship; before the pressure increases above acceptable levels (above acceptable levels would cause a human's ear drums to burst and bleed out), the ship must ventilate to equalize with atmospheric pressure.  In case you're wandering, the oxygen aboard ship is actually converted in an oxygen generator from deionized water through a process called electrolysis.
783676
Newton's Laws of Motion describe only the motion of a body as a whole and are valid only for motions relative to a reference frame. \nFirst law - An object at rest tends to stay in rest and an object in motion tends to stay in motion in a straight line at constant speed unless acted upon by an external, unbalanced force - like those big propellers. \nSecond law - The rate of change of momentum of a body is proportional to the resultant force acting on the body and is in the same direction. Which is why a really big submarine needs really big propellers to go.\nThird law - To every action (force applied) there is an equal but opposite reaction (equal force applied in the opposite direction).   So if the propeller pushes against the water one way, the propeller and the ship it is attached to move the other way.
941024
Methane gas can create large bubbles that can bring down ships and low flying planes.  Rogue waves up to 100 feet have also been documented in that area which can sink ships.  Also, and you can do some research on this,  the earth's magnetic field is changing greatly in many places all over the world, and this can interfere with instruments.  We have found some ships and planes, but not all.  I don't think we have the technology yet to send robots by themselves under the ocean. If we did, we wouldn't still be using those little unmanned research subs that are connected to ships.  Perhaps we can do it, but it's too expensive for now.
945646
lol first of all wellcome back reporter, i missed you.ok a klub missile is a russian built anti ship anti submarine missle(n.a.t.o name ss-n-27).it's the state of the art modern missile capable of destrying any modern stealth ship or submarine, it's the only one of its kind in the world, here i'll give you the link to it,