φfizikzauglom

PHYSICAL QUANTITY

Mass: formulas and units of measurement

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

mkilogram

KEY CONNECTIONS

Formulas

8
m = ρV
F = ma
m = kelIt
m₀ = M / Nₐ
ν = m / M
m = m₀ / √(1 − v²/c²)
pV = (m/M)RT
T = 2π√(m/k)

NOTATION

Quantities in formulas

Mass is a scalar physical quantity that is a measure of the inertia of a body.
Density is the mass of a substance per unit volume.
Volume is the size of the area of space occupied by a body.
Force is a measure of the interaction of bodies that changes their movement or shape.
Acceleration is the rate of change in the speed of a body.
Electrochemical equivalent is the mass of a substance released by a unit charge.
Current strength is the charge passing through the cross section of a conductor per unit time.
Time is a quantity characterizing the duration and sequence of events.
The mass of one particle is the mass of an individual molecule or atom of a substance.
Molar mass is the mass of one mole of a substance.
Avogadro's constant is the number of particles in one mole of a substance.
Quantity of a substance is a measure of the number of particles in a sample of a substance.
Rest mass is the mass of an object in a reference frame where it is stationary.
Speed is the speed and direction of change in body position.
The speed of light in a vacuum is the maximum speed of propagation of interactions.
Pressure is the force per unit surface area.
The universal gas constant is the coefficient of connection between the parameters of an ideal gas.
Temperature is a measure of the thermal state of the body.
A period is the time of one complete repetition of a process.
The stiffness of a spring is a characteristic of its resistance to deformation.

THEORY

Related Lessons

Inertia, interaction and mass7 class · 18 minAmount of heat and heat balance8 class · 28 minNewton's three laws9 class · 28 minSI units and conversion10 class · 14 min

PRACTICE

Related tasks

Mass and density7 class · 6 problemsThermal phenomena8 class · 12 problemsNewton's laws9 class · 6 problems

DIRECTORY

Timet, τ · withPressurep · PaEfficiencyη · %Densityρ · kg/m³WorkA · JVelocityv · m/sEnergyE, W · JBody weightP · N

Where to go next

Course and theoryLessons

Topics in order: the concepts, quantities and formulas of a lesson with explanations and examples.

Practice by topicProblems

Statements, answer options and a detailed walkthrough for every topic of the course.

Your own routeTraining

A 10-question check-up, exercises with answer checking, and saved progress.