This has been answered in a recent question.
The upward force equals the weight of the liquid that could have occupied the volume of the object below the surface.
If it were not so, then imagine what would happen if you could instantaneously remove the object and refill the space left with liquid ... that liquid would either sink or be ejected.
For a ship this upward force balances the total weight of the ship. The ship sinks deeper into the water until the volume below the surface represents an amount of water with the same weight as the ship.
So a ship floats deeper in water than it would in Mercury, because much less mercury needs to be displaced to match the ship's weight.
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Buoyancy depends on the density of the object or substance compared to the density of the fluid it is submerged in, as well as the volume of the object that is displacing the fluid. Objects that are less dense than the fluid will float, while objects that are more dense will sink.
Buoyant force depends on the volume of the liquid expelled and the density of the liquid.
Buoyancy depends on volume and mass (not weight) in other words it depends on density
-- the volume of the object that displaces some of the fluid
-- the density of the fluid
The buoyancy factor of steel in seawater is less than 1, meaning steel will sink in seawater due to its high density. The exact buoyancy factor will depend on the specific composition and weight of the steel. Additional factors such as surface area and volume will also influence the buoyancy of steel in seawater.
The buoyancy of an object depends on its density compared to the density of the fluid it is submerged in. If the object's density is less than the fluid, it will float; if the density is greater, it will sink. The lower the density of the object, the higher the buoyant force acting on it.
The buoyancy force depends on the density of the fluid, the volume of the object submerged in the fluid, and the acceleration due to gravity. This force is also influenced by the Archimedes' principle, which states that the buoyant force acting on an object is equal to the weight of the fluid displaced by the object.
Three types of buoyancy are positive buoyancy, negative buoyancy, and neutral buoyancy. Positive buoyancy occurs when an object is lighter than the fluid it displaces, causing it to float. Negative buoyancy happens when an object is heavier than the fluid it displaces, causing it to sink. Neutral buoyancy is when an object has the same density as the fluid it displaces, resulting in it neither sinking nor floating.
Buoyancy is the upward force that liquids and gases exert on objects submerged in them, counteracting the force of gravity.