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Why does diffusion occur?

Diffusion is a type of passive transport, which is classified into three main categories: simple, facilitated and channel diffusion. The rate at which diffusion takes place is affected by several factors. These include particle size, concentration gradient, particle solubility, distance traveled by the particle, temperature and surface area across which the particle can move. Diffusion does not occur when a substance is at zero degrees Kelvin.

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Why are mammals important?

Hunting mammals, such as lagomorphs or ungulates, has grown into a multi-billion dollar enterprise. Lagomorphs are commonly known as rabbits or hares whereas ungulates are historically known as hoofed animals. In the United States, licensed hunters harvest more than two million deer yearly for food and resource purposes.\nIn a geopolitical aspect, the search for marine mammals were instrumental in charting multiple areas in the Antarctic and Arctic regions. Mammals raised on a ranch, such as the fox, mink or chinchilla, are crucial to the fur industry. This industry directly and indirectly gen..

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What are the functions of interstitial cell-stimulating hormone?

Encyclopaedia Britannica notes that the interstitial cell-stimulating hormone is produced in the pituitary gland. In men, it stimulates the interstitial cells of the testes, which aid in the production of testosterone. In women, following ovulation, the interstitial cell-stimulating hormone causes a change in a small vesicle in the ovary called the graafian follicle. The graafian follicle is transformed into an endocrine gland called the corpus luteum, which secretes progesterone.\nAccording to Wikipedia, the production of this hormone is cyclical, especially in females. An acute rise in the p..

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What color is anthracite?

Anthracite is widely used in thermal power stations for generating electricity. It was also used as a domestic fuel before liquefied petroleum gas became common. Anthracite contains up to 98 percent carbon, and this allows it to burn without a flame. It has a high calorific value and makes a good fuel. It does not produce much soot when burned. Pure anthracite is hard and has a metallic luster.

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What type of lava was produced in the most recent Mount St. Helens eruption?

During the more than 3 years of volcanic activity spanning 2004 through early 2008, the rising solid-lava spines extruded through the crater floor and created a new 1,500-foot-high lava dome. The extrusions grew, at times, as quickly as 6 feet per day. Dense clouds of ash, dust and vapor were emitted, but the volcanic activity that began in 2004 produced no notable explosive events.

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How does the movement of tectonic plates cause earthquakes?

Earthquakes are one type of natural disaster. They cause large tremors that can bring down man-made buildings. While earthquakes cannot be predicted, their size can be measured on the Richter scale. A higher number indicates a more severe earthquake.

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How does geothermal energy work?

Heat created in the interior of the Earth continuously flows outward in a way that is virtually limitless. This creates opportunities for people to use this heat in a number of different ways. While places with obvious signs of geothermal activity, such as hot springs, are the most obvious places to consider the use of geothermal energy, it can potentially be used anywhere.\nCurrently, the most common way to use geothermal energy is taking advantage of hydrothermal convection systems that occur naturally. In these systems, water leaks into the Earth's crust until it is heated and returns ..

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Does a magnet stick to stainless steel?

Some components interfere more than others. For example, stainless steel that contains chromium — often used for kitchen knives — is still somewhat magnetic, while stainless steel that contains nickel — such as in kitchen sinks — is not magnetic at all. Other alloying elements used in stainless steel include molybdenum, manganese, silicon, copper, nitrogen, niobium, titanium and sulfur.

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What are the components of water?

Water itself is a very simple chemical compound, but it reacts to a wide variety of substances in ways that foster the formation of life. Water is found in many solutions, known as aqueous solutions, such as blood or digestive juices. The components found in a sample of seawater might be a mix of mostly water and mineral components evenly distributed and sparsely populated by biological matter like microbes or the traces of dead animals.\nWater is a solvent, allowing it to break down various other substances into aqueous solutions, which has been vital in the formation of life. Life is thought..

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What is 1 cc equal to in milligrams?

The density of water is approximately 1 gram per cubic centimeter. The densities of other elements vary greatly. Temperature also affects densities of the materials.\nIn the medical field, a doctor may prescribe a medication by milligrams. If the medication is in a liquid solution, the concentration in milligrams per cubic centimeter allows it to be dispensed by volume instead of weight. However, concentrations also vary, making it necessary to know the conversion factor.

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