PHYSICAL QUANTITY
Energy: formulas and units of measurement
Energy: symbol E, W, unit J. Formulas and explanations for Mechanics, Electricity, Magnetism, MCT and thermodynamics.
E, Wjoule
KEY CONNECTIONS
Formulas
Ep = mgh
Ek = mv² / 2
Econtrol = k(Δl)² / 2
We = CU² / 2 = q²/(2C) = qU/2
Wm = LI² / 2 = ΦI / 2
U = (3/2)(m/M)RT
NOTATION
Quantities in formulas
- Potential energy is the energy of the relative position of bodies or parts of a system.
- Mass is a scalar physical quantity that is a measure of the inertia of a body.
- Gravity acceleration is the acceleration of a body under the influence of gravity without taking into account the resistance of the medium.
- Height - vertical distance from the selected level.
- Kinetic energy is the energy of movement of a body.
- Speed is the speed and direction of change in body position.
- Elastic deformation energy is the energy stored by a deformed body.
- The stiffness of a spring is a characteristic of its resistance to deformation.
- Elongation is a change in the length of a body during deformation.
- Electric field energy is the energy stored by the electric field.
- Electrical capacity is the ability of a conductor or capacitor to accumulate charge.
- Electric voltage is the work done by the electric field when transferring a unit charge.
- Electric charge is a quantity that determines the participation of a body in electrical interaction.
- Magnetic field energy is the energy stored in a magnetic field.
- Inductance is the ability of a conductor to create a magnetic field when current passes.
- Current strength is the charge passing through the cross section of a conductor per unit time.
- Magnetic flux is a measure of the magnetic field passing through a surface.
- Internal energy is the energy of movement and interaction of particles of matter.
- Molar mass is the mass of one mole of a substance.
- 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.
THEORY
Related Lessons
Efficiency and mechanical energy7 class · 24 min→Temperature and internal energy8 class · 22 min→Work, power and energy conservation9 class · 30 min→Binding energy, fission and reactor9 class · 32 min→Work, power and energy10 class · 28 min→Internal energy and the first law10 class · 26 min→Capacitors10 class · 28 min→Magnetic flux and induction11 class · 30 min→Mechanical vibrations11 class · 28 min→Photons and the photoelectric effect11 class · 30 min→Atomic nucleus and radioactivity11 class · 32 min→
PRACTICE
Related tasks
Work, power and energy7 class · 9 problems→Thermal phenomena8 class · 12 problems→Nuclear physics9 class · 6 problems→Conservation laws10 class · 17 problems→Thermodynamics10 class · 12 problems→Electrostatics10 class · 12 problems→Magnetism11 class · 11 problems→Oscillations and waves11 class · 30 problems→Quantum physics11 class · 17 problems→Nuclear physics11 class · 14 problems→
DIRECTORY
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