Want this question answered?
volume
When the weight of any object surrounded by fluid is greater than the buoyant force on it, it sinks. (The buoyant force is just the weight of the fluid that would be in that space if the submerged object were not there.)
To rise again, the submarine's weight must be decreased. Air is pumped into the ballast tanks to force the water out. The buoyant force acting on the submarine now exceeds the submarine's weight. With positive buoyancy, the submarine rises. The less weight an object has the more its density decreases. Hope that kinda helps?
It is not the matter of density. When inflation tank is filled with water then the weight of submarine is more than the weight of the displaced water. So submarine is in the sinking condition. As water is pumped out then weight of displaced water which is known as Buoyant force would be more than the weight of the submarine. So it would float.
On its volume.
The buoyant force on any object in a fluid ... whether partially or fully submerged ... isequal to the weight of the fluid displaced by the object. That's related to the object'svolume, and has nothing to do with its weight.
The buoyant force is equal to the weight of the displaced fluid (Archimedes Principle). A gallon jug underwater will have a buoyant force equal to the weight of the displaced water: eight pounds. The total weight will also include the normal downward weight of the jug itself and the air it contains.
No, but the difference between the buoyant force and the weight of the object will determine whether it floats or sinks.
The buoyant force doesn't depend on the object's weight. It depends on theobject's volume, which the question doesn't reveal.
A submarine actually controls its weight by allowing water to enter or exit hollow chambers in its hull. These chambers are called ballast tanks. Ballast is anything carried in a ship to give stability. When water is allowed to flood into a submarine's ballast tanks, the weight of the submarine increases. When this increased weight exceeds the submarine's buoyancy, the submarine will sink. To allow the submarine to rise, air is pumped into the ballast tanks. The air forces out the water, reducing the weight of the submarine. The submarine then becomes lighter, buoyancy increases, and it floats to the surface. A submarine can also be made to "float" underwater at any depth by adjusting the amount of water weight in its ballast tanks.
Figure out the weight of the device (ROV, submarine,etc), and then the weight of the water displaced. When they are equal, the device is neutrally buoyant. However, usually engineers create a ROV with a slightly positive or negative bouyancy, personally I perfer a positivly buoyant ROV because if you lose power or the tether is cut the ROV will ascend back up to the top. A more simple answer is that when the gravity & buoyancy are equal it is neutrally buoyant
The same object is more buoyant in a denser fluid, and is more likely to float, than in a less dense one. That's why tennis balls float in water but not in air.