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What is the Molal freezing point depression constant?

The change in the freezing temperature of pure solvent from that of its solution is calculated by using two constants. These are multiplied by the molality of the solution in moles per kilogram. In the relevant equation, ΔT represents the change in freezing temperature of the pure solvent from that of the solution, and m represents the molal concentration of the solution.\nThis concept is easily demonstrable by working an example. Take a solution of 1.6g of naphthalene dissolved in 20g of benzene. The freezing point of pure benzene is 5.5 degrees Celsius and that of the mixture is 2.8 degrees..

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Why are stars different sizes?

As their mass increases, stars change in size, color, fusion rate and luminosity, according to Sun.org. Stars that are similar to the sun and have a solar mass of one are called G stars. They are characterized by a yellow color and a fusion rate that enables them to live for nearly ten billion years. Smaller stars have lower fusion rates because the temperature and pressure in their cores are lower compared to other stars.\nThe biggest stars are called O-type stars, which have a solar mass of 150 or more. Due to their high surface temperature, they show a blue color. There are incredibly high ..

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What is a noncoding strand?

The body's hereditary building blocks are in the form of DNA, or deoxyribonucleic acid. DNA information is stored as codes that are created from the four chemical bases adenine, guanine, cytosine and thymine. There are about three billion bases that make up human DNA, and more than 99 percent of those are the same for everyone.

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What is Stensen's duct?

The average Stensen's duct is approximately 2 inches long and 1/8 inch wide. Salivary duct stones may cause blockages, leading to parotitis, which is the inflammation of the parotid gland. This can also occur when there is external pressure. Stensen's duct is named after Danish anatomist Nicolas Steno, who is credited for creating a detailed description of the structure in 1660.

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What are some popular theories about the end of the world?

Scientists anticipate the explosion to occur in a series of pulses that sends the Sun's mass outward in the form of a gassy nebula. The Earth, along with the other planets in the solar system, are likely to shatter in the blast and send debris into the universe.\nThe Bible foretells of a period of destruction, suffering, famine and pestilence accompanying the second coming of Christ and the final judgment in which God accepts the good into heaven and condemns the evil to eternity in hell. Years of war, catastrophic earthquakes, oceans of blood and every horror imaginable, including Satan&..

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How many satellites does Uranus have?

Uranus has 13 rings and it appears a greenish-blue color due to its composition that include helium, hydrogen and methane. The methane is responsible for the color. William Herschel discovered this planet on March 13, 1781, when he was looking at the sky using his telescope. Many people viewed it before, but they ignored it due to thinking it was another star.

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Does everybody have a birthmark?

Birthmarks can be different colors, shapes and sizes. The color can range from shades of red, pink, brown or blue. They can be flat or raised and are categorized according to characteristics. Common birthmarks include cafe-au-lait spots, hemangiomas and macular stains, according to the NYU Langone Medical Center. Birthmarks are commonly found on the face and neck but can form anywhere on the body. Birthmarks on the back of the neck are referred to as "stork bites," while those found on the forehead are often called "angel kisses." Most birthmarks fade over a period of months to a few years. Th..

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What do marmosets eat?

Marmosets have claw-like nails that they use to cling to trees as they feed. They use their sharp incisors to scrape or chew holes in the trunks of trees. When the exudates ooze out, they use their tongues to lick them up. They create multiple holes in few trees until the sap becomes depleted, and then they move on to harvest resources from other trees.\nSometimes marmosets stalk and feed on insects, such as butterflies, which are attracted to the sap holes. Smaller species of marmosets are able to scurry into the tops of trees to feed on the prevalent insects.\nLarger primate species, such as..

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What is generalized transduction?

Part of the benefactor bacterial DNA is unintentionally enclosed in a capsid. Additional infection of the virus and lysis of the particle to the new bacterium makes recombination between homologous parts of the recipient chromosome and injected DNA to occur and form a rDNA after the release of the donor material. According to National Center for Biotechnology Information, only a few number of phage progeny are able to transport donor genes in the process of generalized transduction.

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What is the human genome?

Scientists began attempting to decode the human genome in 1990. A preliminary copy of the human genome was prepared in 2000, with a highly accurate map constructed by 2003. By mapping the genetic sequence of DNA, scientists can look for abnormalities or differences in the sequence among individuals, possibly pinpointing the cause of different diseases or disorders.

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