The average density of an object equals its total mass divided by its total volume. Density can be the amount of matter in a given volume, also known as mass density. Copyright © 2011. In general, density increases as pressure increases and temperature decreases. The symbol most commonly used for density is ρ (the lower case Greek letter rho). In words, the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. Absentee Ballot vs. Mail-In Ballot: Is There A Difference? (Bonus Episode), Airbnb CEO: The pandemic will force us to see more of the world, not less, New York City transit needs a $12 billion bailout—or the entire U.S. economic recovery may suffer, Flamboyant cuttlefish save their bright patterns for flirting, fighting and fleeing, Alfred Hitchcock’s Fade to Black: The Great Director’s Final Days. the relative degree of opacity of an area of a negative or transparency, often expressed logarithmically. The quantity of something per unit measure, especially per unit length, area, or volume. An only-red-states America probably isn’t one Trump would actually like, What if Your Company Had No Rules? Sorry, your blog cannot share posts by email. Density is a measure of mass per volume. the state or quality of being dense; compactness; closely set or crowded condition. What is Density in Science. Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. Density is an intensive property of matter, which means the size of a sample does not affect its value. Gurnett knew that he could use the vibrations in the plasma to determine its density. For more information, see the following related content on ScienceDaily: Content on this website is for information only. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Comet Found to Have Its Own Northern Lights, Ocean Carbon: Humans Outpace Ancient Volcanoes, Patterns in 66 Million Years of Earth's Climate, How Coronavirus Took Hold in N. America, Europe, Missing Ingredient in Dark Matter Theories, Strict Social Distancing, Lower COVID-19 Risk. The New Dictionary of Cultural Literacy, Third Edition Density, mass of a unit volume of a material substance. The density of an object or substance is its mass divided by its volume: Density = Mass ÷ Volume. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. The American Heritage® Science Dictionary the degree to which something is filled, crowded, or occupied, a measure of the compactness of a substance, expressed as its mass per unit volume. Density is commonly expressed in units of grams per cubic centimetre.