23. Сформулируйте вопросы на английском языке и дайте ответы на них. Опишите правила векторного сложения. Нарисуйте.

What rules of vector addition do you know? Describe and draw.

The parallelogram law

• draw vector 1  using appropriate scale and in the direction of its action

• from the tail of vector 1 draw vector 2 using the same scale in the direction of its action

• complete the parallelogram by using vector 1 and 2 as sides of the parallelogram

• the resulting vector is represented in both magnitude and direction by the diagonal of the parallelogram

The triangle law

• draw vector 1 using appropriate scale and in the direction of its action

• from the nose of the vector draw vector 2 using the same scale and in the direction of its action

• the resulting vector is represented in both magnitude and direction by the vector drawn from the tail of vector 1 to the nose of vector 2.

24. Сформулируйте вопросы на английском языке и дайте ответы на них. Какие фундаментальные величины сохраняются в физике? Какие ограничения применяются к законам сохранения?

Which fundamental values are constant in physics?

What limits are applied to conservation laws?

Fundamental Physical Constants Name Symbol Value Speed of light c Planck constant h Gravitation constant G Boltzmann constant k Molar gas constant R Avogadro's number NA 6.0221 x 1023 mol-1 Charge of electron e Permeability of vacuum Permittivity of vacuum Coulomb constant Mass of electron Avogadro's number Stefan-Boltzmann constant

25. Сформулируйте вопросы на английском языке и дайте ответы на них. Что является естественным спутником Земли? Какова природа гравитационных сил? Какова природа электромагнитных сил?

What is the natural satellite of the Earth?

The natural satellite of the Earth is the Moon.

What is nature of gravitational forces?

Any object (particle) with mass has a gravitational field around it.

What is the nature of electromagnetic forces?

Any charged object (particle) has an electromagnetic field around it.