When we add salt to a glass of water, depending on the amount placed in this glass, the salt will dissolve or not. The same is true when we put too much sugar in black coffee. Not all sugar will dissolve in coffee. The amount that does not dissolve will be deposited in the fund. Solubility coefficient is the amount of substance required to saturate a standard amount of solvent at a given temperature and pressure.

A pendulum is a system composed of a mass coupled to a pivot, which allows its movement freely. The mass is subject to the restorative force caused by gravity. There are numerous pendulums studied by physicists, as they describe it as an object of easy prediction of movement and which has enabled numerous technological advances.

Also known as accelerated movement, it consists of a movement where there is variation of speed, that is, the furniture undergoes acceleration as time goes by. But if this speed variation is always equal at equal time intervals, then we say that this is a Evenly Varied Motion (also called a Evenly Accelerated Motion), that is, it has constant, nonzero acceleration.

During chemical reactions, the chemical bonds of reagents and products change. We can calculate ΔH by analyzing these new rearrangements. Binding enthalpy is the change in enthalpy found at the 1mol breakage of a given chemical bond, considering that all substances are in the gaseous state at 25 ° C and 1atm.

Generally speaking, we know that acid is every substance that produces an H + cation in water and that base is every substance that produces an OH- anion in water. This theory has long been used to explain the concept of acid and base. It is Arrhenius's Theory. But new theories of acid and base have emerged over time.

A magnet is defined as an object capable of causing a magnetic field around it and can be natural or artificial. A natural magnet is made of minerals with magnetic substances, such as magnetite, and an artificial magnet is made of a material without magnetic properties, but which can permanently or instantly acquire characteristics of a natural magnet.