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What is the Lewis dot structure of NO2?

The "N" represents the nitrogen atom and the two "Os" represent the two oxygen atoms. The dots represent the valence electrons for each atom. Each line represents two electrons bonding together the atoms. The double line represents two pairs of electrons forming a double bond, while the single line represents one pair of electrons forming a single bond.

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What is the weight of a bushel of apples?

In the U.S. the average individual consumes about 42 pounds of apples per year, or slightly less than a bushel each. While an average apple is 10 to 14 ounces, the smallest apple varieties can be just slightly larger than a cherry. The largest apples grown are the size of a softball and can be over 3 pounds each. The average apple tree grows approximately 20 bushels, or around 1000 pounds, of apples per season.

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Which element has the most protons?

Uranium is the heaviest natural element. In addition to ununoctium, which was first discovered by a team of Russian chemists in 2006, there are 25 other manmade elements that have more protons and are heavier than uranium.\nThe discovery of ununoctium was made through the collision of light particles, which resulted in an atom of ununoctium that lasted for less than one-thousandth of a second before breaking apart.

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Why is a dam thicker at the bottom than at the top?

Dam construction reflects the variety of forces that act upon it. Some, such as water pressure and the weight of the dam itself, become steadily greater toward the bottom of the dam. Other forces, such as those exerted by earthquakes and ice formation, are intermittent and often difficult to predict. Earthquake forces are particularly difficult to plan for because they happen unexpectedly and may travel in any direction.\nThe ideal size and shape for a dam depends on its size, purpose, location and the available building materials. Gravity dams rely upon their extreme weight to resist water pr..

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Where can you find metric bolt torque specifications?

CNCExpo.com's metric torque bolt specs table lists torques for selected thread sizes and thread pitches from M5 to M36. The table shows torques in foot/pounds or inch/pounds and for dry or lubed application for each fastener, with lubed meaning clean bolts oiled with a medium thickness machine oil. MachineToolHelp.com lists some torque specs in foot/pounds for selected thread sizes between M4 and M30 and bases the figures on different factory bolt specification settings.

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What are water recycling systems?

Waste water, also known as greywater, is dirty water flushed from toilets, sinks, showers and other household plumbing systems. One type of recycling system, a greywater filtration system, filters particulate matter from waste water using a series of filters. These systems remove large debris from waste water, such as seeds and leaves that accumulate in outdoor rain barrels.\nUnfiltered greywater pump systems are common water recycling systems in households. These systems are best for indoor use, because the lack of a filter can cause sediment build-up within the system. Unfiltered greywater p..

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What are transient microbiota?

Transient microbiota that have been picked up can be easily washed from the skin. In contrast, the normal microbiota cannot be cleansed from the skin during normal hand washing. The biggest danger posed by transient microbiota is their ability to enter the human body and cause disease. Normally, microorganisms enter the human body through natural ports of entry or breaks in the skin.

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Does wood conduct electricity?

Other examples of insulators are glass, plastic and rubber. As with wood, these insulators slow the flow of electrons from atoms. Insulators are commonly used as protection from electric shock, as they slow the passing current from a conductor and debilitate it from continuing through the insulator. Conductors, on the other hand, have electrons that easily flow from one atom to another, and they can be used to create electricity. Metals like aluminum and copper are common conductors.

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Are snapdragons perennials?

The botanical name for a snapdragon is Antirrhinum majus, and Antirrhinum is Latin for "pig's snout," according to About.com. They have brightly colored blooms that start to flower from the bottom of the stalk to the top. They flower in the spring season and prefer full sun or partial shade environments. Dwarf varieties can be as small as 6 inches, while common varieties can be as tall as 4 feet high.

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What is the function of ACTH?

ACTH is produced by the pituitary gland after being signaled by corticotrophin-releasing hormone, or CRH, which is produced in the hypothalamus. As stated by the Society of Endocrinology, after ACTH is released from the pituitary gland, the hormone travels to the adrenal glands. The ACTH binds to receptors in the adrenal glands to stimulate the production of cortisol.\nWebMD explains that cortisol is a hormone that manages physical and psychological stress. Cortisol levels are critical to sustain life. ACTH and cortisol levels are inversely related. As cortisol levels rise, ACTH levels fall. T..

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