![]() The buoyant force is described by Archimedes’ principle as: an object, when placed in a fluid, Determine the density or specific gravity of a solid or fluid whether it floats or sinks. Explain the difference between density and specific gravity.ģ. Determine whether or not an object will float or sink in a fluid if you know the densityĢ. When you finish the experiment, you will be able toġ. Or a substance relative to the density of pure water, with both values of density expressed in Really nothing but relative density i.e., it is a unit-less ratio between the density of an object The term specific gravity is probably more confusing than it is worth. Submerged object is always greater than that on the upper surface. Our internal pressure doesn’t adjust to external pressure changes, so we must surround ourīodies with air at normal atmospheric pressure if we ascend into the atmosphere or descendīecause of the vertical pressure gradient in fluids, the pressure on the lower surface of a We don’t notice this pressure, of course, because theįluids inside our bodies exert a balancing outward pressure. We live our lives at the bottom of the atmospheric ocean which exerts about 15 pounds ofįorce on every square inch of our bodies. And because fluids areĬompressible, the greater pressure at a given depth squeezes the fluid into greater density at ![]() The object will sink when its weight exceeds the weight of the displaced fluid.īecause of Earth’s gravity, every fluid substance from the atmosphere to the oceans to a tankįull of gasoline has an internal pressure that increases with depth. Or partially submerged in a fluid is equal to the weight of the amount of fluid displaced by the Philosopher Archimedes, the buoyant (upward) force exerted on an object that is either wholly Object floats, it is buoyed up by a force equal to its weight. You will use Archimedes’ principle in this experiment to determine the densities of severalĪ solid object may float or sink when placed in a given fluid (i.e., in a gas or a liquid). ![]() University Physics, Exp 13: Archimedes’ Principle Produced by the Physics Staff at Collin CollegeĬopyright © Collin College Physics Department. The mass balance reads 75 g, what is the density of the unknown liquid? When the object is completely submerged in water, the massĥ) The same object used in problem 1 is completely submerged in an unknown liquid. When the object is surrounded by air, the How would the experimental results be affected?Ĥ) An object is suspended from a mass balance. How else could youģ) If during the submerged weighing procedure air bubbles were to adhere to the object, 1) How will you measure the volume of the solid objects in this experiment?Ģ) Explain how the hydrometer measures a liquid’s density. ![]()
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