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Where is magnetite generally found?

Magnetite is eroded into rivers and carried to the beach, where it accumulates in sand. It is then concentrated via wave action and currents. In the United States, large quantities of high-quality magnetite have been mined in New Jersey and Vermont. The east coast of the United States contains several well-known magnetite sources. In Europe, large amounts of magnetite have been extracted in Sweden, Norway, Germany, Switzerland and Italy.

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What are the most basic building blocks of all organisms?

There are two types of cells: prokaryotic cells and eukaryotic cells. Eukaryotic cells possess a defined nucleus and membrane-bound structures called organelles, while simpler prokaryotic cells lack these features. The nucleus of a eukaryotic cell contains DNA, and the organelles perform specific functions such as protein synthesis and waste removal. All multicellular organisms are made up of eukaryotic cells; only the simplest life forms, archaea and bacteria, are prokaryotic.

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What are the visceral organs?

The visceral organs of the thorax are protected by the ribs and sternum. They include the heart, which is centrally located high in the chest and slightly to the left, and the lungs, which are located behind the heart and almost fill the ribcage from left to right. Underneath the lungs is a sheet of muscle called the diaphragm, which divides the chest from the abdomen and forces air in and out of the lungs. Higher up, above the ribs, are the thyroid gland and the trachea. They are only partially protected via cartilage in the neck.\nThe visceral organs of the abdomen include the stomach, the l..

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How do you convert kilocalories to calories?

In nutritional contexts, both "calorie" and "kilocalorie" sometimes refer to the same unit; nutrition labels attempt to clear the confusion by capitalizing "Calorie" when it refers to a kilocalorie.\nPreviously, a calorie was defined as the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius at standard pressure and density. This definition was discarded when the joule became the standard unit of energy for the International System of Units.

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What is a light colored igneous rock with high silica content?

Granite is found below the Earth's surface and is composed primarily of lightly-colored quartz and feldspar minerals. It has a coarse grain type with typically large crystals. Rhyolite is considered an extrusive counterpart to granite, as it contains a high amount of feldspar and quartz and has a similar appearance. It forms above ground from highly viscous lava and displays a fine grain type. Rhyolite typically has extremely small crystals due to a fast cooling process that prevents the crystals from growing.

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How does a cyclone separator work?

The particles of dust and dirt that enter the cyclone are heavier than the air that surrounds them. Because of this, more force is needed to keep the debris continuously moving in a circular motion, although the force of the air that is inside the chamber isn't that strong. As the air continues to spin, the heavier particles of dirt and dust begin to separate from the other debris and move toward the walls of the chamber, sliding to the bottom of the container's dust bin.\nThe clean air that is located at the bottom of the cyclone begins to change directions as it moves up the center..

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What is the stroke volume of a normal resting heart?

Montana State University states that this volume is better known as the cardiac output. The cardiac output for an average person is between 4.8 to 6.4 liters every minute. During exercise, the cardiac output increases, as both the stroke volume and the heart rate increase. However, Montana State University states that once the individual's heart rate reaches above 40 to 60 percent of its maximum, the heart's stroke volume cannot increase further.

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Who invented hydroelectric power?

At the time, many mines required steam engines, which used large amounts of coal and wood. While watching a spinning water turbine, Pelton noted that if the water hit the side of the turbine, the wheel spun faster. He also noted that there were numerous fast-flowing creeks and waterfalls that could be used to turn the turbine. In the 1870's he began work on his invention, installing the first working model at the Mayflower mine in Nevada City, Calif., in 1878.

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What is marine biology?

Marine biology also involves studying the behavior of marine organisms in the ocean environment, adaptations living in seawater, and how they interact with each other.\nMarine biology is a branch of biology and is linked to oceanography, a branch of science that studies the ocean. It also covers numerous ideas from ecology. Fields of study like physical oceanography and marine chemistry are also closely related to marine biology.\nA person who specializes in marine biology is called a marine biologist. Marine biologists use various tools to study the oceans. These tools include sampling method..

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Where does hydroelectric energy come from?

Most hydroelectric plants are associated with dams because a steady, controlled flow of water works best for generating electricity. A dam lets the operators build up a reservoir of water and allow it through the turbine at controlled speeds. Water flow from a dam can also be adjusted to meet demand. Hydroelectric plants can also take advantage of low demand by pumping water back upstream, storing it in the reservoir for use during peak power demand periods.

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