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How does an electrical dynamo work?

The dynamo was first demonstrated in 1832 by Hippolyte Pixii. He designed a machine according to a principle articulated earlier that year by Michael Faraday, which stated that an electrical conductor encircling a magnetic field will produce an electromotive force, a principle now known as Faraday's Law.\nIn practical terms, this means that if mechanical power is applied to turn a spindle wrapped with a conducting coil inside a shaft lined with magnets, an electric current will be generated. The mechanical force can be supplied by hand-turning a crank, for example, as in the case of Pixii..

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Why is the sun important to Earth?

The sun is more commonly known for giving warmth, light and energy, but other aspects of the Sun affect the Earth as well, according to NASA. X-rays and energetic types of atomic particles caused from disturbances and solar flares affecting the sun can also affect radio waves traveling Earth's ionosphere. These disturbances have been known to cause voltage fluctuations and blackouts of cities.

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What is the relationship between metamorphism and tectonic plates?

Some of the most famous and well-known metamorphic rocks are quartzite, marble, slate, phylitte, schist and gneiss. These types of rocks differ in texture and grain. The texture and grain differences occur mostly because of the differences in amounts of heat they endure. These types of rocks comprise most of Earth?s crust.\nThere are several metamorphic process types that create metamorphic rocks. Tectonic plate movement is just one type of metamorphic process, though this process is usually the most common cause of the melting and re-crystallization of rocks because of the frequency of the te..

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What is the purpose of inoculating an agar slant?

A slant tube is a test tube prepared by pouring in a melted agar medium while the tube is tilted. This creates a slanted surface on which to inoculate bacteria. Creating a large plug of agar medium and capping the tube prevents desiccation and allows for the long-term storage of living bacterial cultures. It is essential that the tubes and medium are sterile before use. Otherwise, organisms other than the intended culture could grow and contaminate the sample.\nBacteria require several different substances to live including water, a source of energy, carbon, sulfur, nitrogen, phosphorus, vitam..

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How do X-rays work?

While most X-rays pass through the soft tissues of the body, harder material, such as bone, surgical implants and metal plates block them. In an X-ray, the calcium in bones absorbs the greatest amount of the energy, so the bones appear as white on the negative image. Muscles and fat absorb some of the radiation, although less than bones, providing a gray image of the body. Since air does not absorb radiation, the lungs appear black. However, if the patient has fluid in the lungs, as with pneumonia or a tumor, the fluid absorbs some of the radiation, allowing the film to display anomalies.\nWhi..

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What is the importance of the troposphere?

The troposphere varies in thickness and height around the world. At its highest point, the troposphere extends 12 miles into the air. At its lowest point, this layer reaches 4 miles above sea level. Regardless of height, the troposphere facilitates temperature regulation and cloud formation. It contains the highest temperatures closer to its base; these warm temperatures help the troposphere retain water vapor, which releases in the form of precipitation.The troposphere also serves as the starting point for the Earth's water cycle. This process begins when the sun pulls water into the atm..

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How many decameters are in a decimeter?

In contrast, the prefix "deci" is equivalent to "one-tenth." So, 1 decimeter is 1/10 of a meter, while there are 10 decimeters in 1 meter. The decameter, also written as "dekameter," and the decimeter represent the first power in the metric system, which functions with a base ten system. The symbols for decameter are "da," "dam" or "dkm," and the symbol for decimeter is "dm."

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How did Mercury get its name?

Mercury is the smallest of the known planets in the solar system. It completes one revolution around the sun in 88 Earth days. Although it is the closest to the sun, Mercury is not the hottest planet, but rather Venus. During the day, the temperature on Mercury can reach an estimated 800 degrees Fahrenheit, which significantly falls to around -300 degrees at night, due to the planet's extremely thin atmosphere. There are no natural satellites orbiting Mercury.The earliest historical records regarding the observation of Mercury date back to the ancient Sumerian culture around 3000 B.C. Alo..

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How does the Sun release energy?

The fusion reactions in the core of the Sun are the result of hydrogen atoms forced together under great pressure. When compressed enough, and if the temperature and pressure are high enough, the hydrogen atoms fuse to form a helium atom. This reaction produces the energy that keeps the Sun burning and is similar to the fusion in a nuclear explosion.\nThe Sun does not have an infinite supply of hydrogen. Eventually all stars exhaust this fuel source. In time, the Sun’s core is likely to collapse under its own weight, causing the temperature and density of the core to increase dramatically. W..

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What is the difference between magma and lava?

Magma can also contain many other components besides just molten rock, including gases and crystals. This mixture maintains a temperature between 1,600 and 2,400 degrees Fahrenheit. The molten rock often contains silicon, iron, carbon, aluminum, magnesium and different alkalis. Magma is heated by geothermal convection and pressure. Typically, it is found several kilometers beneath the earth's surface.\nThe composition of lava determines whether its flow is explosive, fast-moving or slow and highly viscous. Temperature plays a less significant role in the look and feel of the volcanic rock..

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