2.11-2.15 ( fluids). What happens when you jump into water? The water pushes aside (displaces) to make room for you. All fluids, gases as well as liquids, behave this way when an object is placed in them.
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What happens when you jump into water? The water pushes aside (displaces) to make room for you. All fluids, gases as well as liquids, behave this way when an object is placed in them.
Buoyancy is not the only force acting on a object in a fluid. The force of gravity (weight) also acts on an object. The particles of a fluid exert a force in a direction opposite to the force of gravity, which pulls down toward the centre of the earth. Buoyant force is measured in Newtons (N). Without gravity there would be no buoyancy. We say that the object has positive buoyancy, negative buoyancy, or neutral buoyancy according to whether it rises, sinks, or remains level in a fluid.
_ the density of the object is less than the density of the fluid
_ the buoyant force on the object is greater than the force of gravity on the object
Design has a lot to do with whether an object will sink or float- if the weight of the object is spread over a large enough area, water can support objects that have densities greater than water.
The buoyant force of a liquid does not depend on physical state, but rather on density. The relationship between buoyancy and density is the basis for the hydrometer, which is an instrument designed to measure density directly. The higher the hydrometer floats in the liquid being tested, the higher the density is (of the liquid). Hydrometers are used widely in the food and beverages industries.