Tag: density

The mass density or density of a material is its mass per unit volume. The symbol most often used for density is ρ (the lower case Greek letter rho). Mathematically, density is defined as mass divided by volume:
where ρ is the density, m is the mass, and V is the volume. In some cases (for instance, in the United States oil and gas industry), density is also defined as its weight per unit volume, although this quantity is more properly called specific weight.
Different materials usually have different densities, so density is an important concept regarding buoyancy, purity and packaging. Osmium and iridium are the densest known elements at standard conditions for temperature and pressure but not the densest materials.
Less dense fluids float on more dense fluids if they do not mix. This concept can be extended, with some care, to less dense solids floating on more dense fluids. If the average density (including any air below the waterline) of an object is less than water it will float…

Seagate Breaks Areal Density Barrier

Seagate (NASDAQ: STX), the leader in hard drives and storage solutions, today unveiled the world’s first 3.5-inch hard drive featuring 1TB of storage capacity per disk platter, breaking the 1TB…

35 TeraByte from IBM and Fujifilm

IBM researchers today announced they have demonstrated a world record in areal data density on linear magnetic tape – a significant update to one of the computer industry’s most resilient,…

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