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Where can you find sulfur?

Sulfur is the 10th most abundant element in the universe. It is a component of many minerals, including iron pyrite, gypsum and galena. Elemental sulfur exists in two crystalline forms and one noncrystalline form.\nRemoving sulfur from petroleum protects the environment from the release of sulfur compounds into the atmosphere. Most of this sulfur is used in the production of sulfuric acid. Manufacturers use sulfuric acid in the production of fertilizer and lead-acid batteries. As of 2014, scientists are looking for ways to make use of the 10 million tons of excess sulfur produced annually. Hea..

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What is the definition of "bending moment of a beam"?

In engineering mechanics, the term ‘beam’ has a very specific meaning. It can be defined as a component that is designed to support transverse loads; that is, external load applied perpendicularly to a longitudinal axis of the element. The bending moment at any point along the beam is equal to the area under the shear-force diagram up to that point. For a simply-supported beam, the bending moment at the end is always equal to zero.\nTo calculate the bending moment, the beam must be broken up into two sections:\n(a) one from x = 0 to x = L/2, and\n(b) the other from x = L/2 to x = L.\nNow,..

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Does Coke remove rust?

Using Coke to remove rust has disadvantages. The soft drink contains a significant amount of sugar. This leaves a very sticky residue that needs to be removed thoroughly once the rust is gone. In many cases, Coke takes a long time to work. Some rusty items need to be soaked for one or more days. In addition, Coke is corrosive to iron, tin and steel. The Coca-Cola Company does not recommend its use as a cleaning product.

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How do diatoms obtain food?

Photosynthesis is the process by which all plant cells make food, including diatoms. Photosynthesis takes the energy from a light source, converts it into chemical energy and stores it in sugar in the plants. Sugar, water and minerals are collected by the diatoms and converted to glucose bonds, which are later used for all the cellular activities required by the diatoms.

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What is the history of urea?

In 1773, French chemist Hilaire Rouelle was the first discover urea crystals from the urine of several animals, including humans. At that time, scientists were familiar with complex organic chemicals, but chemical analysis showed that urea was a very simple compound.\nFriedrich Wohler, a scientist in Berlin and famous as the discoverer of aluminium, made a breakthrough in 1828 while attempting to create ammonium cyanate. Instead, the resulting crystals behaved like the ones that Hilaire Rouelle had found. Because ammonium cyanate is an unstable compound, the atoms quickly rearranged into a mor..

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How do engines work?

Most automobile engines in use in 2014 are four-stroke engines. Inside the engine, the piston begins its cycle at the top of the cylinder. An intake valve opens, allowing fuel and air to enter the piston as it moves to the bottom of its cycle. The valve closes as the piston begins its compression stroke. As the piston nears the top of the cylinder, the spark plug fires to create an explosion that pushes the piston to the bottom again. As it starts to move back to the top, the exhaust valve opens to expel the exhaust gases. When the piston reaches the top of the cylinder, it starts the cycle ag..

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What is the most reactive element?

At first, scientists had a hard time isolating fluorine, according to Jefferson Lab. The element fluorine belongs to the group of elements called the halogens. In general, the halogens are the most reactive nonmetals on the periodic table.\nFor nonmetals, the trend of reactivity increases as you go up a group of elements. According to this trend, fluorine then would be the most reactive element in the group of halogens.

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What is the link between smell and taste?

When a person is unable to smell a food, he may discover that the food tastes different. In fact, the food has the same taste, but a person is not able to perceive the food's flavor because his brain is not receiving any olfactory messages, according to BrainFacts.org. The lack of ability to perceive flavor is what causes an individual to perceive that a food tastes differently.\nSpecialized sensory neurons in the roof of the nose detect odorants, which causes axons to move to the two olfactory bulbs beneath the brain's frontal lobe, states BrainFacts.org. Each odorant causes differe..

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What is the boiling point of salt water?

A pot of water with 20 percent salt boils faster because the salt in the water does not take much of the heat being directed into the solution. Therefore, a pot with high levels of salt is essentially heating up a smaller amount of water than a pot with no salt.

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Is CHC13 polar or non-polar?

Chloroform has four covalent bonds: three C-Cl bonds and one C-H bond. According to the University of Wisconsin-Eau Claire, the bond between carbon and hydrogen is considered nonpolar, while the bonds between carbon and chlorine are considered polar. Cloroform has low polarity index and dielectric constant because of the tetrahedral geometry of the bonds within the molecule and their low polarity. Chloroform is considered a nonpolar solvent despite being a slightly polar chemical compound.

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