PHYSICAL QUANTITY

Density: formulas and units of measurement

Density: symbol ρ, unit kg/m³. Formulas and explanations for Mechanics, MCT and thermodynamics.

\rho

\frac{\text{kg}}{\text{m}^3}

kilogram per cubic meter

KEY CONNECTIONS

Formulas

ρ = \frac{m}{V}

ρ = m / V

ρ = m_{0} n

ρ = m₀n

p = ρ g h

p = ρgh

F_{A} = ρ g V

Fₐ = ρgV

p M = ρ R T

pM = ρRT

p = \frac{1}{3} ρ ⟨ v^{2} ⟩

p = (1/3)ρ⟨v²⟩

NOTATION

$\rho$: Density is the mass of a substance per unit volume.
$m$: Mass is a scalar physical quantity that is a measure of the inertia of a body.
$V$: Volume is the size of the area of space occupied by a body.
$m_0$: The mass of one particle is the mass of an individual molecule or atom of a substance.
$n$: Concentration is the number of particles per unit volume.
$p$: Pressure is the force per unit surface area.
$g$: Gravity acceleration is the acceleration of a body under the influence of gravity without taking into account the resistance of the medium.
$h$: Height - vertical distance from the selected level.
$F_A$: Archimedes' force is the buoyant force of a liquid or gas.
$M$: Molar mass is the mass of one mole of a substance.
$R$: The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
$T$: Temperature is a measure of the thermal state of the body.
$v$: Speed is the speed and direction of change in body position.

THEORY