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Chemistry

Curiosities (page 3)

What are organic products? Why is our world colorful? Where does the odor from our perspiration come from? How did the IUPAC nomenclature come about? Salt Empire How important is iron in our body? Why do salads wither? Chemical Elements and Their Symbols in the Middle Ages Chemical Elements and the Stars
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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

Glycides (continued)

Glycogen is a polysaccharide with chemical formula (C 6 H 10 O 5) n. It is formed by the condensation of glucose molecules and has branched structure. Glycogen is present in the muscles and liver of animals. It is the main animal reserve, capable of being transformed into glucose depending on the body's need.
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Physics

Latent heat

Not all heat exchange in nature stops changing body temperatures. In some cases there is change of physical state of these bodies. In this case we call the calculated amount of heat latent heat. The amount of latent heat (Q) is equal to the product of body mass (m) and a proportionality constant (L).
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Physics

Acoustics Issues

Sound and its propagation 1. Sound is a mechanical wave that travels in the air at varying speeds according to the local temperature. Assuming that in one place this speed is 340m / s. If a speaker vibrating its membrane at this location emits 1,250 pulses per second: a) Determine the frequency of membrane vibration in Hertz; This answer is found in the statement itself, since if the membrane emits 1,250 pulses per second, it repeats its movement 1,250 times per second, that is, its frequency.
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Physics

Electrostatic Issues

2. Three electrically charged particles are placed on a side equilateral triangle d = 40cm as shown below. What is the modulus of force and an outline of the electric force vector acting on charge 3? To calculate the modulus of force acting on charge 3 we must first calculate separately the influence that loads 1 and 2 have on it, and by both calculate the resulting force.
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