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A submarine has a variable buoyancy due to it's ballast tanks. When a submarine submerges, it fills it's ballast tanks with water which causes negative buoyancy. When a submarine surfaces, it pumps the water out of the ballast tanks thus giving it positive buoyancy.
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What kind of buoyancy do submarines have when they are resting on the surfce of the ocean?
Positive Buoyancy. When submarine submerges, it initially uses negative buoyancy to submerge, and then levels out to neutral buoyancy.
What do Archimedes principal help to explain?
Archimedes principal explains buoyancy. The principle makes its use in ships and submarines.
How or where is buoyancy used in real life?
Buoyancy is used for many life examples, submarines, swimmers would like to know about it, and the army would use it. Those are some life examples that of real life that buoyancy would be used! Hope this helps!
Why does a submarines density decrease when it pumps air out?
It doesn't pump air out; it forces water out of its ballast tanks to increase its buoyancy.
What kind of science fair invention can you make by using recyclables?
When science fair invention you can do is to make submarines out of empty plastic soda bottles. This project will explain buoyancy and how it plays an effect in the movement of submarines.
What does buoyancy have to do with submarines?
Buoyancy is extremely important in submarines. To sink or dive, they must achieve a very delicate 'negative' buoyancy. It could be very dangerous to sink too fast. Water is pumped into the submarines ballast tanks to make them sink, then later is blown out by compressed air to give them 'positive' buoyancy and make them rise. - While cruising underneath the surface it's very important to achieve a state of 'neutral' buoyancy allowing the sub to rise or fall according to the movements of it's 'planes' ( a wing-like device similar to aircraft 'elevators') . The 'planesman 'on any submarine has a very important job of keeping it at assigned depth.To complicate this, the sea is not all the same - under the surface there are currents flowing almost like rivers, and 'saline' layers of different densities of water. All of these can change the depth of a neutrally balanced boat.
Why is liver the main organ for sharks buoyancy if it only gives off oil in not so large quantities while stomach can hold and compress air and use them like submarines?
Liver is much larger in sharks as compared to stomach.Liver not only helps in buoyancy but also keeps shark upright. there are other factors which are also involved in buoyancy.
Do fish have air bags?
Only when they drive really fast submarines...Actually, fish have what is called a swim bladder; this is what helps them with buoyancy, and to stay upright in water. When there is a problem with their swim bladder (or they are constipated!) they will have buoyancy problems, and in many cases, get stuck swimming upside-down.
How do submarines and whales sink and float in water as needed?
Submarines and whales have ways to adjust their buoyancy. That's how they sink and float as needed. Each has a different method of adjusting buoyancy.The submarine controls buoyancy by adjusting ballast. Submarines have ballast tanks that can be filled with air or flooded down with water. When full of air, the ballast tanks provide enough buoyancy to keep the submarine afloat (provided the pressure hull is not full of water). The ballast tanks are open on the bottom, and have valves (called main vents) on the top. When we open the main vents, air is forced out by sea water that is coming in at the bottom. Once the ballast tanks are flooded, the boat will submerge. The crew then "fine tunes" the buoyancy by adding water to or pumping water out of tanks inside the pressure hull. These tanks are also used to trim the ship so it is neither heavy in the bow or the stern.Whales can fill their lungs with air to float or swim on or near the surface. When they dive, they take a breath and swim down against the upward force of buoyancy. As they move deeper, pressure forces their ribs (which are not rigidly attached to their vertebrae) inward and their lungs are compressed. This reduces buoyancy and makes it easier to go deeper. As far as actual "control" of their buoyancy, investigators are still not clear about many aspects of the workings of whale physiology, and debate and speculation continue.
What affect provided by water aerobics helps make the exercise beneficial?
Buoyancy
How submarines float on water?
The air trapped in the hull (this includes the buoyancy tanks) make it lighter than the water it displaces. The buoyancy tanks surround the main hull (where the people and machinery are), and can be flooded to allow the ship to sink. Refilling them with air (from compressed air tanks) allows it to return to the surface.
Ships float submarines sink?
Wrong!!!! Ships float, and submarines also float. However, submarines have special buoyancy tanks, which are filled with sea-water, which then makes then sink. The air in these tanks is removed by a vacuum, out into compressed air cylinders. , this allows water to enter and hence the submarine sinks. To make the submarine re-surface, the compressed air in the compression tanks is blown back into the buoyancy tanks, thereby pushing out the sea-water, hence the submarine re-surfaces(floats). Remember the Archimedian Principle. 'The weight of a body immersed in a fluid is equal to the weight of the fluid displaced'. As an experiment to yourself, obtain a spring balance, an house brick and a tanks of water. Attach the brick to the spring balance, with a piece of string, and note the weight in air. Now keeping the brick attached to the spring balance lower it into the water of the water tank, and note the new less weight. The difference in the weight is the weight of the water displaced by the brick. Hence Archimedes principle and the reason why ships and submarines can float, because the displace less water.
