fajsúly
Fajsúly is a term used in Hungarian physics and engineering to describe how much mass a given volume of a material contains. In many contexts it is equivalent to density, the mass per unit volume. In other settings, fajsúly may refer to weight density (weight per unit volume) or to a substance’s specific gravity, which is the ratio of its density to that of water. The precise meaning can vary by field and region, so technical texts typically define the term explicitly.
In SI units the primary quantity is density, ρ, with units of kilograms per cubic meter (kg/m^3). If
Typical values illustrate the concept: air ~1.2 kg/m^3, water ~1000 kg/m^3, steel ~7850 kg/m^3, tungsten ~19,000 kg/m^3.
Measurement methods include direct determination by measuring mass and volume or by buoyancy-based techniques, pycnometry, and
Applications of fajsúly are widespread: buoyancy calculations in fluids, structural and mechanical design, HVAC and fluid