Сформулируйте вопросы на английском языке и дайте ответы на них. Что такое работа силы по перемещению частицы? Что такое мощность силы?
What is the working of force on the movement of particle?
Work is the scalar product of the force vector and the practice displacement vector. Mesured in joules.
What is the power of force?
Power is the amount of energy (done work of force) consumed per unit time. Measured in watts.
Сформулируйте вопросы на английском языке и дайте ответы на них. Опишите правила векторного сложения. Нарисуйте.
Describe the rules of vector addition. 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.
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?
In physics, there are a number of constants, which, according to recent data, have the same value at any point in the observable universe, so they are called fundamental, or the worldconstants. These are constant: the constant of gravity, the Planck constant, the speed of light, the mass of the proton, the electron mass, the Hubble constant (for our age) and several other.
What limits are applied to conservation laws?
In physics, a conservation law states that a particular measurable property of an isolated physical system does not change as the system evolves.A partial listing of conservation laws that are said to be exact laws, or more precisely have never been [proven] to be violated:Conservation of mass-energy, Conservation of linear momentum, Conservation of angular momentum, Conservation of electric charge.
There are also approximate conservation laws. These are approximately true in particular situations, such as low speeds, short time scales, or certain interactions. Approximate conservation law: Conservation of mass (applies for non-relativistic speeds and when there are no nuclear reactions), Conservation of baryon number (See chiral anomaly), Conservation of lepton number (In the Standard Model), Conservation of flavor (violated by the weak interaction).
In physics, the law of conservation of energy states that the total energy of an isolated system cannot change—it is said to be conserved over time.
In real processes, where a frictional force, there is a deviation from the law of conservation of mechanical energy. For example, when the body falls to Earth first kinetic energy of the body increases as speed increases. The sum of kinetic and potential energy of all the bodies of the system remains constant.
The law of conservation of mass, or principle of mass conservation, states that for any system closed to all transfers of matter and energy (both of which have mass), the mass of the system must remain constant over time, as system mass cannot change quantity if it is not added or removed.
This law applies only for non-relativistic speeds and when there are no nuclear reactions.