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7.голасарий2019-2020й.

A mechanical stress is a physical quantity determined by the elastic force per unit area of ​​the cross section of the body.
Strength of the material is called its property to withstand the actions of external forces without destruction.
The ultimate strength is called the mechanical stress, which corresponds to the largest body-borne load before the destruction of its crystalline structure.
A safety factor (safety factor) is a number that indicates how many times the tensile strength is greater than the permissible voltage. The limits of strength depend on the properties of the materials. The safety factor depends on the nature of the load, the conditions of use of the material and many other factors.
Thermal expansion is the increase in the linear dimensions and volume of bodies, which occurs when their temperature rises. Linear thermal expansion is characteristic of solids. Volumetric thermal expansion occurs both in solids and in liquids when they are heated.
The melting of solids is called their transition from a solid state to a liquid state.
Electrostatics is a section of electrodynamics in which the properties and interactions of stationary electrically charged bodies or particles with an electric charge are considered in the inertial reference frame.
An electric charge is a physical quantity that characterizes the property of bodies or particles to enter into electromagnetic interactions and determines the values ​​of forces and energies under such interactions.
The Coulomb law: the modulus F of the electrostatic interaction force between the charges q1 and q2 in a vacuum is directly proportional to the product of the charge moduli and inversely proportional to the square of the distance between them:
Electromagnetic interaction is the interaction between electrically charged particles or macroscopic charged bodies.
Electrodynamics is a branch of physics in which electromagnetic interactions are studied.

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