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Density (volumetric mass density or specific mass) is a substance's mass per unit of volume. The symbol most often used for density is ρ (the lower case Greek letter rho), although the Latin letter D can also be used. Mathematically, density is defined as mass divided by volume: [1] where ρ is the density, m is the mass, and V is the volume.
Oct 22, 2024 · density, mass of a unit volume of a material substance. The formula for density is d = M / V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre.
- The Editors of Encyclopaedia Britannica
Unit of Density. Though the SI unit of density is kg/m³, for convenience we use g/cm³ for solids, g/ml for liquids, and g/L for gases. Density can be explained as the relationship between the mass of the substance and the volume it takes up. In a qualitative term, it shows how much heavy an object is at constant volume.
- 3 min
- A material’s density is defined as its mass per unit volume.
- The principle of density was discovered by the Greek scientist Archimedes.
- The density of a human body can be determined by the following expression: Density = Mass/ Volume The mass of the human body can be calculated by...
- If a substance weighs less than an equal volume of water, it is less dense and will float.
- If the liquids are immiscible, and they are not stirred, or only stirred gently, they will separate into 2 layers, with the less dense floating on...
the mass per unit volume of a substance or object This page titled 11.2: Density is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by OpenStax via source content that was edited to the style and standards of the LibreTexts platform.
- Density Formula
- How to Find Density
- Using Density
- Specific Gravity
To calculate the density (usually represented by the Greek letter "ρ") of an object, take the mass (m) and divide by the volume (v): The SI unit of density is kilogram per cubic meter (kg/m3). It is also frequently represented in the cgs unit of grams per cubic centimeter (g/cm3).
In studying density, it can be helpful to work a sample problemusing the formula for density, as mentioned in the previous section. Recall that though density is indeed mass divided by volume, it is often measured in units of grams per cubic centimeter because grams represent a standard weight, while cubic centimeters represent the volume of the ob...
One of the most common uses of density is in how different materials interact when mixed together. Wood floats in water because it has a lower density, while an anchor sinks because the metal has a higher density. Helium balloons float because the density of the helium is lower than the density of air. When your automotive service station tests var...
A concept related to density is the specific gravity (or, even more appropriate, relative density) of a material, which is the ratio of the material's density to the density of water. An object with a specific gravity less than one will float in water, while a specific gravity greater than one means it will sink. It is this principle that allows, f...
- Andrew Zimmerman Jones
Dec 2, 2017 · Density is the amount of mass in a unit of volume. In a liquid, the portion with the highest density is at the bottom of the container. By definition, density is mass per unit volume. In other words, it is the amount of matter packed into a space. The symbol most commonly used for density is ρ (the lower case Greek letter rho).
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Sep 18, 2024 · Density is a measure of mass per unit volume of a substance. It is calculated by dividing an object’s mass by its volume and is typically expressed in units of grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³). Density Examples 1. Water. Density: 1 g/cm³; Water is used as a standard for measuring the density of other ...
