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What factors affect soil permeability?

Permeability is a property that determines how well soil transmits air or moisture. Permeability may be affected by the volume of soil comprised of open space, interconnection of porous materials within the soil and the degree of saturation. Soil permeability is commonly determined by measuring the rate of water flow through the soil over a set period of time.

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Which subjects do future civil engineers need to excel in?

Civil engineering requires mathematical aptitude. The coursework in this area is heavy on calculation, and this is not something that will only be used in school. In many cases, the safety of a finished building, bridge, road or another project rests on the shoulders of the civil engineer, and incorrect calculations can lead to disaster. Physics is also an important component of civil engineering, as an understanding of physical principles is another important part of correctly completing building projects. Overall, civil engineers should be logical thinkers who also have a creative streak tha..

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How do you measure liquid in a syringe?

Syringes come in many sizes ranging from 0.5 ml to 60 milliliters. Because of this, varying increments of measurement are used. Depending on the size of the syringe, scales with increments of 0.01 milliliters to 2 milliliters exist allowing for a very accurate way of delivering medicine, as described by the UNC Eshelman School of Pharmacy.

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What were the contributions of Archimedes to the field of physics?

Archimedes lived in Syracuse between 287 and 212 BCE. During his life, Archimedes advanced the human understanding of physics by developing the fields of hydrostatics and statics, as well as improving the understanding of the lever, according to Wikipedia. The scientific model that bears his name, the Archimedes Principle, was developed as a way to determine the purity of gold. Using the principle of displacement, Archimedes devised a test whereby a "gold" crown was submerged in water and the volume displaced was recorded. An equal measure, by weight, of pure gold was then subjected to the sam..

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How many BTUs are in a cord of wood?

When burning wood as a heat source, dry wood is preferable over green wood. Green wood contains more water and produces less heat and more smoke and creosote than dry wood.\nThe best wood to use in fireplaces is wood that is dense or heavy, like cedar and oak, which produces little smoke and does not pop or spark. Conifers, such as spruce and pine, throw out many sparks, which could cause a fire in the home.

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How are surface winds formed?

PGF comes into play because wind is essentially moving air. As air moves from a region of high pressure to a region of lower pressure, wind is formed. Any change in pressure causes wind, and greater differences in pressure cause stronger wind. A small example of PGF can be found in mountainous regions. During the day, winds blow uphill because the mountainside is hotter than the area below. Conversely, winds blow downhill at night when the mountainside cools.\nCoriolis force comes about from the Earth's rotation and causes moving objects to shift to the right if they are in the Northern h..

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What are the key characteristics of the different layers of the earth?

Most of the surface of the Earth is made up of water, which comprises the oceans. However, the crust of the earth, which lies beneath the oceans and floats the continental plates, is solid and made largely of basalt and granite. The crust under the oceans is between 3.7 and 6.8 miles thick, while the crust that makes up the continents is between 15.5 and 56 miles thick\nThe upper mantle is separated from the crust by the Mohorovicic discontinuity. It is rigid and between 62 and 124 miles thick. The asthenosphere, a flowing layer, is part of it. Beneath it is the lower mantle. All in all, the m..

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What is the conversion for 360 kilometers per hour to miles per hour?

Kilometers per hour, or kph, is a unit for measuring speed representing the number of kilometers a moving body can travel in one hour. This unit of measurement may also be expressed as km/hr, but kph is the most commonly used expression in most English speaking countries. The expression "kph" is used on road signs and car speedometers in most English-speaking countries.The United States has its own system of measurements called U.S. customary units or English units, which uses the units inch, foot, yard and mile when referring to length or distance. While similar to the imperial system of unit..

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What five-carbon sugars are found in DNA nucleotides?

The other two components in DNA include a triphosphate and a base that contains nitrogen. These three components make up a nucleotide. Each strand of the double helix in DNA is made up of a string of nucleotides. The triphosphate molecules each bind to two five-carbon sugars to create a chain. The base binds to the other side of the 2?-deoxyribose.\nThe four bases found in DNA are adenine, cytosine, guanine and thymine. Adenine and guanine are a type of molecules called purines and have two carbon-nitrogen rings. Cytosine and thymine are a type of molecules called pyrimidines and have one carb..

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What is the composition of salt water?

Gold is also found in sea water, with about 25 pounds of gold in 1 cubic mile of sea water.\nSalinity changes not just the taste but other attributes of water. The saltier the water, the more dense it is. Salt water found in a warm environment, such as the Mediterranean Sea, has a higher salinity than that of bodies of water found in colder climates due to evaporation. Because cold saltwater is more dense than warm, fresh water, it sinks beneath it. This is one of the causes of ocean currents.\nThe salinity of the oceans and seas is due to the water cycle. When the rain falls, the slight amoun..

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