Recommended Interesting Articles

Physics

Length contraction

To study the relativity of the length, we will analyze the following situation: we will imagine the same wagon of the previous item with the same conditions already established. As shown in the following figure, the wagon will go through a tunnel. We will adopt two benchmarks to measure the length of the wagon.
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Chemistry

Atomic mass

The atomic mass of the atom is expressed in u. Indicates how many times the mass of the atom is greater than 1/12 of the mass of the carbon atom (A = 12). When we measure a quantity, we compare it with another as a reference. To measure the mass of our body we use the kilogram (kg) as the standard unit. If the person has a mass of 80kg it means that his mass is 80 times greater than the mass of 1kg.
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Physics

Carnot cycle

Until the mid-nineteenth century, it was believed that it was possible to build an ideal thermal machine, which would be able to transform all the energy supplied into work, obtaining a total yield (100%). To demonstrate that this would not be possible, French engineer Nicolas Carnot (1796-1832) proposed a theoretical thermal machine that behaved like a full yield machine, establishing a maximum yield cycle, which was later called the Carnot Cycle.
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Chemistry

Nitriles

Nitriles are nitrogenous organic compounds that contain the functional group - C ≡ N. They can be called cyanides. The most common nitriles are hydrogen cyanide. Here are some examples: - Methanenitrile or hydrogen cyanide or hydrogen cyanide - It is a bitter almond-scented gas discovered in 1782.
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Chemistry

Space Isomery (continued)

Optical Isomery Optical spatial isomerism is one that has a carbon with four different ligands. We call this carbon asymmetric. It is identified with an asterisk (*). Asymmetric or chiral carbon - is the carbon atom that is bonded to four different groups.
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Chemistry

Water

Water on planet Earth Water is found everywhere: in the seas, rivers, lakes, clouds, groundwater, in the air, animals, plants, humans. Water is indispensable for life. Hydrosphere On our planet, there is a huge layer on the surface of the earth's crust that is covered with water.
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