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What is the ballast of a ship usually made of?
Ballast on smaller vessels is often water,high density materials like concrete or iron or just the weight of the crew. On larger vessels such as container ships,it is a combination of water and cargo.
What is an electrical ballast?
Firstly, there are a few meanings for the word ballast, and they are used in different contexts.In an electrical context:Electrically, It adds resistance to limit the current. In a fluorescent light fitting, the ballast adds resistance. Once the lamp conducts, it presents a very low resistance to the circuit and would draw too much current. The ballast coil also has reactance and provides a back emf pulse, to enable the lamp to fire (conduct) when it is interrupted by the starter.In an a shipping context:Ballast is used in ships and submarines (both new and old) to provide stability to the vessel within the water. Normally the trim of a boat in the water will differ whether it carrying a cargo or not, if the ship is lighter and higher in the water it is more inclined to roll from side to side in heavy weather. In order to prevent this ballast tanks are used in ships, these are then filled with seawater in to make the ship heavier (lower) in the water and less prone to tilting. Before the ship takes on cargo the tanks are pumped out making the boat "ride" higher in the water. Earlier wooden vessels also used ballast, but would use stones, rock or bricks for this purpose.In submarines, ballast tanks are flooded with water or purged using compressed air in order to maintain neutral buoyancy, or to allow the submarine to ascend or descend.In hydraulics/ irrigation terms:Ballast tanks (sometimes called buffer tanks) are used in irrigation and plumbing systems to provide a buffer between supply and demand systems. A simple example of this is the water tank of your toilet. The system, when flushing requires a fairly substantial amount of water, the mains water supply of a typical house does not have this volume all at once, so the water is stored in a small ballast tank. When you press the flusher a larger volume of water that can normally be supplied by the house water supply is release - giving you a clean bowl.
The choke ballast repair method is used when?
Water is standing in the crater or if subsurface material is unsuitable to fill the crater
What is the name of the compound Ca(ClO)2?
Calcium hypo-chlorite. It is used to sanitize public swimming pools and disinfect drinking water.
Who was the first scienctist to figure out how steel ships float on water?
archemedes
Why do ships dump ballast water?
Ships dump ballast water to counter any weight they take on, or to decrease their draft.
What liquid makes ships lower?
Ballast tanks contain water, usually sea water.
What is main ballast of a vessel?
Ballast used to be stones. With the invention of the electric pump, I think most ships will actually pump water into and out of tanks to adjust their ballast now.
Do ships in the general lakes need more or less ballast than ocean-going ships?
Ships need more ballast in the ocean because the salt helps to keep them a float.What we know is that salt water is about 3% more dense than fresh water and that ships use the water they are floating in for ballast.Say an ocean ship needs 10 tonnes of ballast to get to it's stable water line. The volume of 10 tonnes of seawater would equal 9.7m3.That same ship will float slightly lower in fresh water since fresh water is less dense. It will need 3% less ballast weight (9.7 tonnes) to get to the same stable water line in fresh water. The volume of 9.7 tonnes of fresh water would equal 9.7 m3.So, the ship in the ocean requires 3% more ballast weight than the ship in fresh water, but the ballast volume is the same in both cases.
What is the ballast of a ship usually made of?
Ballast on smaller vessels is often water,high density materials like concrete or iron or just the weight of the crew. On larger vessels such as container ships,it is a combination of water and cargo.
Do ships in the great lakes need more or less ballast than ocean going ships?
Ships need more ballast in the ocean because the salt helps to keep them a float.What we know is that salt water is about 3% more dense than fresh water and that ships use the water they are floating in for ballast.Say an ocean ship needs 10 tonnes of ballast to get to it's stable water line. The volume of 10 tonnes of seawater would equal 9.7m3.That same ship will float slightly lower in fresh water since fresh water is less dense. It will need 3% less ballast weight (9.7 tonnes) to get to the same stable water line in fresh water. The volume of 9.7 tonnes of fresh water would equal 9.7 m3.So, the ship in the ocean requires 3% more ballast weight than the ship in fresh water, but the ballast volume is the same in both cases.
How was the round goby brought into the US?
Ballast water in cargo ships, brought over from the Black, Caspian, Marmara, and Azov seas.
What affects the weedy sea dragon?
1: Ballast Water- because if you look at the mum clues (scientific questions) go to page 11 and go to the one about the fungus, it will say it is found in ballast water. They release the water because when they dont have cargo (the ships) they pump water in the water tanks, but when they have cargo, they let go of the water
What is a center tank on ships?
Big ships have ballast tanks to do two things: allow an unloaded or lightly loaded ship to ride lower in the water, and to change the way the ship rides in the water. The center tank is there to adjust ride height.
Why are zebra mussels located primarily in areas in the eastern US rather than in the western US?
It is generally agreed upon by scientists that zebra mussels entered the Great Lakes from ballast water dumping by large ocean-going vessels from Europe. Ballast water is used to keep ships stable in the water.
What is the ballast on a boat?
Weight used to keep the boat stable in the water. Old seagoing vessels, such as pirate ships use to have ballast stone which was kept in the bottom of the boat down the middle(keel) to keep the boat sitting properly in the water. Modern submarines use saltwater in their ballast tanks(big huge tanks located inside the hull) to enable them to sink and remain submerged
What were ships ballasts used for during World War 2?
When the ship is empty it rides very high in the water, bobbing around like a cork. This is unstable and uncomfortable for the crew. Ballast - sea water - was usually taken on, in special built-in tanks just inside the hull of the ship, to make the ship heavier, so it would ride lower in the water and be more stable. In olden times sailing ships used rocks for ballast.
