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Why is friction good?

How Stuff Works explains that kinetic friction occurs between moving bodies, while static friction occurs when a force on an object does not cause movement. Electrical attraction can also cause friction. The amount of friction depends on the roughness of a surface, weight of objects and opposing forces. The thickness or thinness of liquids determines the amount of friction they cause. How Stuff Works notes that friction is important in sports, such as curling and tenpin bowling. Air resistance is a type of friction that makes cycling and running sports possible.\nFriction holds screws and nail..

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What comprises a plasma membrane?

Many of the proteins in the plasma membrane can move about freely and are not anchored in a fixed position. These proteins serve as transporter molecules and move substances in and out of the cell. Some proteins can also act as enzymes and catalyze certain biochemical reactions.The plasma membrane separates the cytoplasm and the interior components of the cell from its outside environment, and it functions as a selectively permeable wall that allows certain substances to enter the cell, while keeping others out. The membrane plays a role in cellular adhesion, cell signaling and ion conductivit..

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How far is Saturn from the sun in miles?

Saturn is 9 1/2 times farther away from the sun than the Earth is. At the their closest, the Earth and Saturn are separated by 746 million miles, while at their farthest, the two planets are separated by a little over a billion miles. When they are farthest apart, Saturn and Earth are on opposite sides of the sun.

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What is character displacement?

While it has not been fully studied and is not fully understood, character displacement is still an important factor to many different living organisms. Character displacement is dependent on evolution and products of the environment. The same species of animal could have character displacement traits revealed in one setting while none of these traits would be evident in a completely different environmental setting. This displacement can help to limit the amount of reproduction that occurs within and between two species while creating a stronger pattern for a single species.Character displacem..

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Why are the cells of the spongy layer packed so loosely together?

According to SparkNotes, the spongy layer is the second layer of the mesophyll, which is the tissue between the epidermal cells into which gases diffuse from the stomata. The stomata, small openings on the underside of the leaf, open and close to allow carbon dioxide and oxygen into the cell. Because the spongy layer is loosely packed, the gases travel into the empty spaces surrounding the spongy cells. The open space allows the gases to move freely into and out of the cell as the stomata open and close. For instance, when the stomata open, carbon dioxide rushes in and oxygen rushes out. When ..

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What is the date of the spring equinox?

Find the exact date and time of the spring equinox of a location by navigating to TimeAndDate.com, clicking Sun & Moon and then Spring Equinox. On the next page, click Local Times for March Equinox. The page displays the date and time of the spring equinox for 145 of the largest cities in the world.\nThe spring equinox is also known as the vernal equinox. The autumnal equinox for the Southern Hemisphere is the same as the spring equinox in the Northern Hemisphere.

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Which factors affect a material's resistance?

All metals have differing properties of conductivity. This makes some more suitable for use in conduction while others are inferior or even useless. The three factors influence these materials in a uniform way limited only by inherent conductivity.Length is the literal physical length of the conducting element. The shorter the element, the better its conductivity as the electricity flowing through it has a shorter distance to travel and can thus travel at greater speed.Width is the cross section of a given conductor. A wide cross section allows more electricity to move through the conductor at..

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What is the difference between tributary and distributary?

The process in which a distributary branches off from a river is called bifurcation.\nTributaries also have a variety of special terms attached to them. The river that tributaries flow into is called a mainstream. A tributary is also known as an affluent, and the point where the tributary meets with the mainstream is called the confluence. In addition, tributaries can be called "left-bank tributaries" or "right bank-tributaries" based on the side of the river on which they're located.\nThe Balikh is one example of a stream that originates in the mountains and eventually combines with the ..

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How many electrons does lithium have?

Lithium, because of its one electron in its outermost energy level, is highly reactive, as are all the elements within the alkali metal family. This element is therefore not found in its free form in nature. Lithium is a silvery metal that is found mainly in igneous rocks and mineral springs.\nJohan August Arwedson discovered the element in 1817. Lithium is the lightest of all the metals and can float on water because it is only half as dense as water.

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Does salt dissolve faster in hot or cold water?

The solubility of sugar changes much more than the solubility of salt based on the temperature of the water. At 0 degrees Celsius, 35 grams of salt dissolve in 100 milliliters of water. At 100 degrees Celsius, salt's solubility only rises to 39 grams per 100 milliliters of water. The difference in solubility between substances is caused by the different arrangement of the atoms, ions and molecules that make up each substance.

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