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How many organs are in the human body?

The skin is the largest organ, typically measuring about 20 square feet. The tongue, or mouth, is an organ, and so are the eyes. The human body can function without the small organs, such as the appendix and gall bladder. Some sources loosely define 78 organs in the human body, including the nose, anus, bones, spinal cord and various glands.

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How big can snowflakes get?

According to a New York Times article, the manager of the physics department at the California Institute of Technology, Kenneth G. Libbrecht, confirms that it is physically possible that the report of the 15-inch wide snowflake is true. In 2013, a satellite was released enabling data weather collection, including the size of snowflakes. Scientists believe that snowflakes may begin larger but lose size as they fall to Earth.

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How do waterwheels work?

The are three major types of waterwheels: one horizontal and two vertical types. The horizontal waterwheel allows water to flow from an aqueduct into the wheel, creating forward action that causes the wheel to rotate. An overshot vertical waterwheel allows water from an aqueduct to fall on top of the wheel and uses gravity to rotate it. The third type is the undershot vertical waterwheel and is placed in a stream to be rotated by the motion of the river.\nWaterwheels may have been the first method used by people to create mechanical energy that did not involve the use of animals or people. A G..

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Who is Walther Flemming?

Walther Flemming was born in Germany in 1843. After studying medicine at the University of Rostock, he served in the military during the Franco-Prussian War. Afterward, he worked as a professor at both the University of Prague and the University of Kiel. His experiments with aniline and basophilic dyes led to the discovery of chromosomes. His work also led to the discovery of cell division and greater knowledge about the composition of cells.

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What is a conical flask?

Invented by the German chemist Emil Erlenmeyer, conical flasks are generally found in laboratories. The wide base and narrow neck of the glass flask makes them perfect for swirling liquids or other compounds together. The contents of the flask stay inside and don't spill. Some Erlenmeyer flasks have measuring marks up the side and sometimes have a spot for a penciled-in label. Stoppers of cotton, rubber, or glass may be used. The contents can also be heated on a burner, although a round-bottomed flask is preferable. \n\nPlastic Erlenmeyer flasks can be used to grow microbial cultures in l..

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What is a mixed decimal?

Mixed numbers are ones that are not whole numbers, they can not be separated into 2 or more whole things and will contain a fraction instead of a decimal. A mixed number can be anything from 5 2/8 to 35/2985 and includes a whole number as well as a portion of another number. It is important to note that a mixed number can easily be made into a mixed decimal by converting the fraction into decimal form. In order to convert a fraction into a decimal, the number on the top needs to be divided by the number on the bottom. This will result in the number becoming a mixed decimal such as 5.31 or 4.00..

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What causes skin to become wrinkly?

Skin serves a variety of purposes for the body. It acts as a watertight barrier against pathogens and provides sensation through a number of nerve endings. Skin is also thermoregulatory and is able to absorb gases such as oxygen, nitrogen and carbon dioxide. The dermis and the epidermis compose the two layers of skin.

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Why are noble gases unreactive?

All of the noble gases, except for helium, contain eight electrons in their outermost energy levels. Helium has two electrons in its outermost energy level, the maximum number that its single energy level can hold. Because these elements already contain the maximum number of electrons in their outermost energy levels, they do not need to find other atoms with which to form compounds. The noble gases were given this name because they do not interact much with other elements. Because of their inherent stability, noble gases can be found in their free forms in nature.

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What is the chemical formula for gypsum?

Gypsum is found in nature as a sedimentary evaporite mineral formed from the evaporation of salt water or as the precipitate from hot springs. Gypsum is a soft, lightweight mineral with perfect cleavage, and will split easily into flakes and plates. Gypsum is sometimes fluorescent when exposed to ultraviolet light.\nThe mineral can be dissolved in both hot water and hydrochloric acid. It is used to make blackboard chalk and drywall, as a flux for pottery, and as a fertilizer.

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What is the role of the tRNA anticodon?

When a protein is created, an mRNA is formed from the cell's DNA. This mRNA is a reverse copy of the DNA's protein code sequence. The mRNA floats into the cytoplasm, where the much smaller tRNA molecules collide with it. The three-peptide anticodon is attracted to its opposite on the mRNA, attaching itself to the appropriate sequence. Science aid compares this process to the creation of a photo negative (the mRNA), which is then used to make perfect copies of the original using tRNA.\nAccording to ACS Publications, on either end of the mRNA's protein sequence is a "stop codon," ..

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