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Why are cars bad for the environment?

Carbon dioxide is the most common greenhouse gas that humans produce; the EPA estimates that carbon dioxide makes up 82 percent of all human greenhouse gas production. It is responsible for trapping heat within the atmosphere and contributes to climate change issues.\n\nCar engines also produce a wide array of particles that are directly harmful to human and animal health. Hydrocarbons and particulate matter can cause breathing difficulties and long-term diseases. Many hydrocarbons are known to be carcinogens, which means they cause cancer.\n\nIn cities with high road traffic, smog is often an..

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How does mitosis differ in plant and animal cells?

Within animal cells, organelles called centrosomes assist organelles called asters and spindle fibers in pulling apart the sister chromatids to opposite poles of the sister cells. In plant cells, these asters are not present, and the spindle fibers pull apart the chromatids on their own.\nThe process of cytokinesis, or the splitting of the cells, is also vastly different between the two types of cells. In animal cells, a cleavage furrow forms between the two forming cell bodies after DNA and organelles have been replicated and situated in their new cell bodies. This furrow continues to close u..

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What does the chemical formula BrF3 represent?

The compound is pale yellow in color and has a strong odor. It will explode if it comes into contact with water, metals, or with any organic compound, including skin. It is most often used to synthesize uranium hexafluoride in nuclear reactors.\nBromine trifluoride is very dangerous and should always be handled with care. Fumes from the liquid can be toxic and potentially fatal if inhaled, leading to upper respiratory distress, and it can even cause blindness. It should only be handled in a well-ventilated room.

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What is HBr acid?

Hydrobromic acid is classified as a strong acid and completely dissociates into its individual hydrogen and bromide ions in water. There are only seven acids recognized to be strong acids. In addition to hydrobromic acid, these are hydroiodic acid, hydrochloric acid, nitric acid, sulfuric acid, perchloric acid and chloric acid. Of these, hydroiodic acid is the strongest acid with a pKa of -10. Hydrobromic acid is the second strongest acid in this set with a pKa of -9.

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What is the driving force behind all agents of erosion?

Gravity affects several elements of erosion. Streams and rivers flow downstream because of the force of gravity along the gradient or slope of the waterway. Water carries silt and sediments away from their origination point and deposits these soils further downstream. Water falls on hillsides as rain and rushes down the side of the elevated landform. The moving water weakens compacted dirt that eventually gives way and falls downhill.\nGravity drives erosion in glaciers due to the crushing weight of the thick ice above the ground. More fundamentally, precipitation that forms glacial ice falls ..

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How many carbs can I eat on a low-carb diet?

People can eat some types of carbohydrates more liberally while still losing and maintaining weight, as long as the person is already active and lean. These types of carbs include limitless vegetables and a number of pieces of fruit daily. Limited amounts of potatoes and sweet potatoes are also permitted on a low-carb diet, as are lesser amounts of rice and oats.

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How does light make colors fade?

How quickly a color fades in sunlight depends on a number of factors. The most important factor is the chemical makeup of the dye or pigment itself. Certain colors are made up of relatively stable molecules, making it difficult for ultraviolet radiation to break the bonds and providing long-lasting defenses against fading. Others, especially those created to be environmentally friendly, may be more unstable and easier to break down when exposed to light. Over time, virtually all pigments fade in the presence of light.\nThis problem is why many important artifacts, such as paintings or document..

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How long do dissolvable sutures take to dissolve?

Doctors use dissolvable sutures most commonly to seal either deep surgical wounds or surface wounds. Dissolvable sutures used on surface wounds dissolve faster than those used on deeper surgical wounds do. Enzymes in the body and the process of hydrolysis both work to dissolve this type of suture. Dissolvable sutures keep the wound closed until it heals completely, and then they slowly disappear. Besides dissolvable sutures, doctors and surgeons use traditional sutures, clips and staples to close serious wounds.

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What is the difference between miscible and immiscible?

Miscibility is an important concept in chemistry. It is a property of compounds that describes the degree in which two or more compounds mix together to form a solution. The types of solutions formed can be homogenous solutions or heterogenous solutions. Miscible solutions are homogenous while immiscible solutions are heterogenous solutions.

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What is the difference between fish and amphibians?

As a class of animals, fish are much older than amphibians, which evolved 370 million years ago during the Devonian period. Amphibians were the first category of vertebrates, or animals with spines, that evolved from fish and left their aquatic habitats to colonize dry land.\nWhile fish propel themselves through water with fins or float along underwater currents and do not have limbs, amphibians do have limbs and can run, jump, climb or swim both on land and in water. Whereas fish breathe by filtering oxygen from water through their gills, amphibians do not possess gills and are able to breath..

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