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What is a group on the periodic table?

On the periodic table, there are 18 groups. A group is also known as the family that the element belongs to. There are multiple ways of labeling each group. One way is simply to number each group from left to right through 18. Another way is to name the topmost element of the group, such as the oxygen group.\nValence electrons are used when one element chemically bonds with other elements.

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How is energy released from ATP?

ATP is made by breaking down glucose, as stated by Dr. Dawn Tamarkin at Springfield Technical Community College. By breaking down the bonds in glucose in the presence of oxygen, energy is produced in order to add a phosphate group to ADP to form ATP. In this way, 38 ATPs are formed. This process is called cellular respiration.\nThe energy of the ATP molecule lies in the bonds between the phosphate groups, or pyrophosphate bonds, states Dr. Mike Farabee of Estrella Mountain Community College. The bond between the second phosphate and last phosphate groups yields the most energy, about seven kil..

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What is the difference between a river and a stream?

Despite the lack of an official distinction, there are some accepted ways to classify streams and rivers. In 1952, Professor Arthur Strahler of Columbia University devised a 12-part identification system for streams. According to this system, first order streams, which are often referred to as creeks, are the smallest and shallowest, whereas 12th order streams are the largest and deepest. Bodies of water classified as seventh order or higher are considered rivers.\nIf multiple streams converge at one point to form a larger, singular body of water, that feature is most often large enough to be ..

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How harmful are plastic fumes?

Women who work around plastic fumes are 400 percent more likely to develop breast cancer, as reported by Global News. The referenced study in Environmental Health shows that endocrine-disrupting chemicals that contribute to cancer growth are found in the fumes of burned plastic.\nWhen plastic is incinerated, it releases basic metals and fumes into the atmosphere that are known to carry cancer-causing dioxins, according to Eureka Recycling. These dioxins can enter the air as well as pollute soil and food. The dioxins are classified as toxic and may result in emphysema, cancer and birth defects,..

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What causes longshore currents?

The velocity of longshore currents as they move along the coast varies in relation to the angle of wave approach, speed and direction of the waves crashing into the beach. Longshore currents that travel at a much faster rate result when high waves break at a sharp angle into steep-sloped beaches. However, when swells with lower wave height approach a gently sloping beach at a wider breaking angle, the speed of longshore currents is significantly reduced.

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Will dry ice remove dents?

The dent is first heated using a hair dryer on a medium setting until the surface of the car is warm when touched. Aluminum foil should be placed on the dent to insulate it. Then, dry ice is held against the panel where the foil is located. The rapid change in temperature causes the dent to pop out. If the dent does not fully pop out, the process can be repeated.

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What is "rotational motion"?

When an object rotates, the amount a given point moves is not just defined by the distance it travels. It also travels through an angle, the portion of a circle the point transcribes as it rotates. If an object rotates 90 degrees, all the points in an object, save those on the axis of rotation, transcribe a quarter of a circle. The speed at which the points in a rotating object transcribe a circle is known as angular velocity, and a change in that speed is known as angular acceleration.\nRotation is achieved by applying sufficient force anywhere on an object except toward the center of mass. T..

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What is a chalkboard made of?

From the 1800s, and well into the 20th century, chalkboards were primarily made from large pieces of slate rock that served as the front of the board. These larger boards were an improvement over individual slates used by students. Slate rock for chalkboards was shipped around the country via railroad, and it greatly improved the effectiveness of a classroom teacher's ability to share information with a large number of students.\nSlate boards were referred to as blackboards during the time they were in use, due to their dark coloring. It wasn't until the 1980s that the name "chalkboa..

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At what level of organization does life begin?

Living creatures have various levels of organization that are extremely complex. Starting at the lowest level of organization, subatomic particles, such as protons, neutrons and electrons, make up atoms that can combine with other atoms to form a variety of molecules.\nAtoms turn into molecules that get together and form cellular structures, including organelles. Many different organelles work together inside a cell. The cell is the most basic functional unit of life.\nIn a multicellular organism, a group of cells that all share the same tasks is called a tissue, and one or more tissues form a..

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Is cracking your neck bad?

After the arteries tear, they begin to bleed out which can cause the blood to clot in irregular areas. When the clots become loose and travel to the brain or lungs, it can result in deadly medical conditions. If a person is having neck pain or feels that the neck needs to be cracked, the person should seek the help of a doctor. There are many exercises that can be done to resolve issues with the neck to prevent problems in the future.

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