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What is a nuclear chain reaction?

The underlying principle of a nuclear chain reaction is fission. The fission process involves splitting the nucleus of an atom into smaller, generally more stable nuclei. Nuclear fission is an exothermic process, which releases a tremendous amount of energy that is harnessed for electrical power.A nuclear chain reaction can either occur in a controlled environment, such as a nuclear power plant, or in an uncontrolled setting, such as the inside of an atomic bomb. The first sustained nuclear chain reaction was demonstrated by the Italian physicist Dr. Enrico Fermi on December 2, 1942 at the Uni..

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Does aluminum react with water?

Aluminum metal forms a layer of aluminum oxide a few millimeters thick when it first comes in contact with water. As that aluminum oxide layer is corroded, hydrogen gas is released. Aluminum chloride undergoes hydrolysis in water and forms a vapor when in contact with air. Hydrochloric acid is formed when it reacts with water vapor. Aluminum ions found in other compounds also undergo hydrolysis until the reaction is ended by the formation of a hydroxide.

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What are examples of sprilla bacteria?

According to Britannica, the genus Spirillum includes a suite of spiral-shaped bacteria that live almost exclusively in watery environments. The only exception is the species S. minus, which lives and breeds on land, and causes a rat-bite fever in humans. Although classified under one name, the title S. minus applies to several different species with corkscrew-shaped torsos. S. volutans is the largest of the spirillum species, and resides in the blood of living organisms, including mice, rats, gerbils and other small rodents. This bacteria can be transmitted easily to other living creatures, i..

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What is solder made of?

Although lead is the most common component of the various kinds of solder, it is not the only kind of metal commonly used. Tin is also a very common component of solder alloys, as it is easy to shape, is stronger than lead, and lacks lead's toxic properties. Silver and copper are other common metals, especially for brazing, a method that produces corrosion-resistant joints at high temperature. Most solder alloys contain at least one of those four metals; many possess them in combination. Zinc is another common component; zinc alloys are especially used as solders for aluminum and steel.\n..

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What is conservation plowing?

In order to be effective, at least 30 percent of the soil must be covered with residue, though some methods of soil tillage involve leaving up to 70 percent of the plant residue. In the most common methods of conservation tillage, new crops are planted directly on top of the residue, though some types of crops grow better when planted on ridges a few inches above the residue.

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What are the uses for iron?

Iron is mostly used to create steel, which is used in civil engineering and manufacturing industries. Ordinary carbon steel consists of iron, carbon and small amounts of other elements.\nStainless steel is used in various products and industries today, especially in automobiles and aircraft. This type of iron is completely recyclable, and it is created when iron is mixed with other metals. At home, iron is used almost everywhere, from iron fences and decorative iron furniture to pots, trays, ovens, kitchen cutlery and other cookware. Cast iron and wrought iron are found in many products in hou..

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Where does meiosis occur?

Meiosis is actually a type of cell division that occurs in the testes of males and in the ovaries of females. Meiosis leads to the formation of cells bearing half the normal number of chromosomes. The process is also referred to as spermatogenesis in males and oogenesis in females. Meiosis does not occur in asexual organisms. It occurs only in organisms that reproduce sexually.\nAll plants and animals undergo meiosis. The gametes undergo fertilization to form a zygote or a fertilized egg.

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Where can you learn about earth science?

Earth science, also called geoscience, encompasses all scientific fields relating to the Earth's planet-wide systems, including oceanography, climatology, ecology and geology. Some systems of the planet include the hydrosphere, biosphere, atmosphere and the lithosphere. Scientists believe that Earth is approximately 4.54 billion years old and formed from the dust cloud left over from the formation of the sun.

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What is the function of the mammillary bodies?

The mammillary bodies combine with the diencephalon to form a portion of the limbic system. The mammillary bodies form the terminals of the anterior arches of the fornix. They carry electrical impulses from the brain and thalamus through to the spinal cord and on to the rest of the nervous system. This explains why these structures are often associated with sensory control and movement.\nThe mammillary bodies each contain two sets of nuclei. One set is called the medial nuclei, and the other set is called the lateral nuclei. Despite long-held beliefs about the mammillary bodies and their funct..

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What temperature kills yeast?

If the water is too cool, the dough may not rise. Extremely hot water either kills the yeast or causes the dough to rise inconsistently. To ensure that the water is within the ideal temperature range of 120 to 130 degrees, check with a thermometer prior to adding the yeast. Proper activation is indicated by the appearance of tiny bubbles on the surface 5 to 6 minutes after the yeast is added to the water.

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