Buoyant Force

浮力

Some of the useful applications of buoyancy and Archimedes' principle are to the experimental determination of density.

浮力和阿基米德原理的一些有用应用是实验测定密度。

Determination of density by water immersion.

通过水浸测定密度。

Determination of density by immersion in a general liquid.

通过浸入一般液体确定密度

Determination of liquid density by immersion of a standard object.

通过浸入标准物体测定液体密度。

Index

Buoyancy concepts

索引：浮力概念

HyperPhysics***** Mechanics ***** Fluids

HyperPhysics ***** 力学 ***** 流体

R Nave

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Buoyant Force, General Fluid

浮力，一般流体

If an object is massed in air and found to have mass m = grams

and is then submerged in a fluid and found to have apparent mass m' = grams

then it has displaced m - m' = grams of the fluid. If the density of the fluid is gram/cm³, this implies
Volume of object = V = cm³.

The density of the object is then ρ = m/V = gm/cm³.

物体的密度是 ρ = m/V = 克/立方厘米。

中文译文中的待填/计算数值依次对应：1：d。实际数值以上方原输入框为准。

This calculation assumes that the density of the liquid is known, and allows you to change mass, apparent mass, volume or density to explore variations. If you wish to determine the liquid density, then go to fluid density determination. Use of a liquid other than water is sometimes useful, but the most common experimental procedure is immersion in water for density determination, as in the classic Archimedes story.

Note that in the experimental arrangement, the container of fluid in which the object is submerged is supported on a platform so that the balance scale does not include the measurement of the mass of the water and its container.