Specific gravity is the ratio of the density of a substance to the density of a reference substance, usually water.
Density: The mass per unit volume of a substance.
Buoyancy: The upward force exerted on an object submerged in a fluid.
Archimedes' Principle: States that the buoyant force on an object is equal to the weight of the fluid displaced by the object.
Anatomy & Physiology
AP Physics 2 - 1.2 Density
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