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What is the contraction phase of the heartbeat called?

In the cardiac cycle, during the diastole phase, the blood flows into the right and left atria and then the ventricles. During the diastole phase, both atria and ventricles relax. During the systole phase, the right ventricle sends the blood out to the lungs through the pulmonary artery, and the left ventricle pumps the blood into the aorta.

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How long is the colon?

The colon is made up of four parts namely the descending, ascending, transverse and sigmoid colon. This body part is responsible for absorbing fluids or water from already digested foods and preparing wastes. Once waste has been prepared, the colon pushes it to the rectum and subsequently stool is passed through the anus. The colon is long and has the shape of a coiled tube. It is also referred to as the large bowel, according to MedicineNet.

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Energy at rest is called what?

Acceleration of gravity is considered 32.2 feet per second squared at sea level. Based on the principle of energy conservation, potential energy can be converted into kinetic energy when an object starts moving. Energy is never destroyed or created but converted into another form. Both kinetic and potential energies are forms of mechanical energy. Their standard measurement unit is joules.

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How fast does a pyroclastic flow travel?

Occurring when part of the eruption column collapses, a pyroclastic flow devastates everything in its path. It generally follows valleys or other low lying areas, but it can jump over water to land on the other side. The hot rock and ash burns everything directly in its path, and inhalation of the hot gas causes burns to the lungs and asphyxiation. Ignimbrites are pyroclastic flows of extremely high volume. They are produced during catastrophic eruptions, with deposits up to a few hundred meters thick.

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What is matter that has the same composition and properties throughout called?

Every pure element and every pure compound are considered to be substances. Iron is an element and therefore it is a substance. A substance does not have to consist of a single element or molecule type. A substance is something that is free from contamination. Another example of a substance is methane, it is a pure compound and, therefore, a substance.

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How many years does it take for a star's light to reach Earth?

Light travels at 186,000 miles per second when moving through the vacuum of space. The distance between stars is so vast that light from Proxima Centauri, the star closest to the solar system, still takes over four years to reach the Earth. Light from the most distant stars has been traveling since just after the formation of the universe.

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What is the normal phase of calcium?

The melting point of calcium is 1548 degrees Fahrenheit, and its boiling point is 2703 degrees F. It has an atomic number of 20. Its atomic weight is 40.078.\nThe ancient Romans used compounds of calcium to make cement and concrete, but it wasn't until 1808 that the English chemist Humphrey Davy isolated the pure metal.\nCalcium is a better conductor of electricity than copper or aluminum, but it is not used in electrical wiring because of its reactivity. Calcium is a fairly reactive metal. If left in air, it reacts with nitrogen to form a skin of calcium nitride, which explodes if placed..

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Why do sunspots occur?

The magnetic field around a sunspot is approximately 2,500 times stronger than Earth's magnetic field. The strong magnetic field creates a great magnetic pressure while the surrounding atmospheric pressure decreases. The umbra is the dark part of the sunspot. Its temperature is 6,000 degrees Fahrenheit while the surrounding surface of the sun reaches 10,000 degrees Fahrenheit, resulting in the dark color of the sunspot. Ultraviolet radiation greatly increases when sunspot activity is high, affecting Earth's atmosphere.\nCoronal flares and solar mass injections occur near sunspots at ..

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What are polysaccharides made of?

Polysaccharides feature multiple long chains of monosaccharides, which are almost exclusively made from glucose. How each polysaccharide varies depends on its structure. Monosaccharides are joined together using glycosidic bonds, and differences can arise depending on the type of sugar they make, as well as how the bonds are structured.The three main forms of polysaccharides are cellulose, starch and glycogen, and together they make the group glycans. In cellulose, the monosaccharide chains are linked together as one long formation. As the cellulose model is straight, they can rest next to eac..

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Why does styrofoam float in water?

When an object is placed in water, it displaces an amount of water equal to the volume of the object. If you imagine the volume of displaced water before the displacement takes place, it is clear that the water is supported by the water around it. That is, the "chunk" of water displaced was already being held up by the rest of the water. This water was being held up by the force of the water below and around it.\nThis force, when applied to an object which replaces the displaced "chunk" of water, is called the buoyant force. So, if an object is more dense than water, this means that it will we..

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