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Chemistry

Carboxylic acid (continued)

Nomenclature IUPAC nomenclature of carboxylic acids shall be made by placing the word acid followed by the corresponding hydrocarbon with the OICO termination. The main or longer chain is the one with carbonyl. Numbering is from the first carbon after carbonyl. In some cases, the usual name is used.
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Chemistry

Daily Chemistry

Bases - Sodium Hydroxide (NaOH) - It is widely used to unclog sinks. It is commercially known as caustic soda. In industry, it is used for soap making. - Magnesium Hydroxide (Mg (OH) 2) - Used as stomach antacid to relieve stomach heartburn, ie excess hydrochloric acid.
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Chemistry

Amines

Amines are nitrogenous organic compounds theoretically derived from ammonia (NH 3) by replacing one, two or three hydrogens with alkyl or aryl groups. Examples: There are some types of amines according to the number of hydrogen substituting radicals. - primary amines: a hydrogen substituted by an organic radical.
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Physics

Visual accommodation

People with normal vision, emmetropes, have the ability to accommodate objects from distances of 25 cm on average, to distances in visual infinity. Near Point The first distance (25cm) corresponds to the near point, which is the minimum distance a person can see correctly.
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Physics

Magnetic Field Issues

1. A magnetic field that influences an electron (charge -e) that crosses the field at right angles to the speed of light (c = 300,000,000 m / s) has a force vector of intensity 1N. What is the intensity of this magnetic field? Knowing the equation that calculates the intensity of the magnetic field, with motion perpendicular to the field: 2.
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Physics

Einstein's interpretation for the photoelectric effect

In 1905, Einstein proposed a new theory for light, using the photoelectric effect to prove whether his ideas were indeed correct. Initially, Planck had restricted the concept of energy quantization to only the electrons in the walls of a blackbody. To him, as he radiated energy, it spread through space, just as waves spread in water.
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