PHYSICAL QUANTITY

Weight: formulas and units of measurement

Weight: symbol m, unit kg. Formulas and explanations for Mechanics, MCT and thermodynamics, Modern physics.

m

\text{kg}

kilogram

KEY CONNECTIONS

Formulas

m = ρ V

m = ρV

F = m a

F = ma

m = k_{el} I t

m = kelIt

m_{0} = \frac{M}{N _{A}}

m₀ = M / Nₐ

ν = \frac{m}{M}

ν = m / M

m = \frac{m _{0}}{1 - \frac{v ^{2}}{c ^{2}}}

m = m₀ / √(1 − v²/c²)

p V = \frac{m}{M} R T

pV = (m/M)RT

T = 2 π \frac{m}{k}

T = 2π√(m/k)

NOTATION

Quantities in formulas

$m$: Mass is a scalar physical quantity that is a measure of the inertia of a body.
$\rho$: Density is the mass of a substance per unit volume.
$V$: Volume is the size of the area of space occupied by a body.
$F$: Force is a measure of the interaction of bodies that changes their movement or shape.
$a$: Acceleration is the rate of change in the speed of a body.
$k_{\text{el}}$: Electrochemical equivalent is the mass of a substance released by a unit charge.
$I$: Current strength is the charge passing through the cross section of a conductor per unit time.
$t$: Time is a quantity characterizing the duration and sequence of events.
$m_0$: The mass of one particle is the mass of an individual molecule or atom of a substance.
$M$: Molar mass is the mass of one mole of a substance.
$N_A$: Avogadro's constant is the number of particles in one mole of a substance.
$\nu$: Quantity of a substance is a measure of the number of particles in a sample of a substance.
$m_0$: Rest mass is the mass of an object in a reference frame where it is stationary.
$v$: Speed is the speed and direction of change in body position.
$c$: The speed of light in a vacuum is the maximum speed of propagation of interactions.
$p$: Pressure is the force per unit surface area.
$R$: 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.
$T$: A period is the time of one complete repetition of a process.
$k$: The stiffness of a spring is a characteristic of its resistance to deformation.

THEORY