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What does a hydrograph show?

Water discharge and stage are two ways of measuring the way water flows in a river or other body of water. A single location is chosen and the rate at which water flows, typically expressed in cubic feet or cubic meters per second, is measured. Over time, information regarding patterns, changes in speed or the effect on the location or overall system can be graphed. These graphs are important for a number of reasons, including understanding urban runoff and sewer systems.

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What are fun facts about the muscular system?

Smooth muscle is also sometimes referred to as visceral muscle. In addition to the bladder, smooth muscle is also found in the lungs, blood vessels, stomach and intestines. Muscles in the human body can be further classified as voluntary or involuntary. Voluntary muscles move when a person initiates the action. Involuntary muscles move on their own and don't require the person to control the movement. Skeletal muscles are voluntary, while smooth and cardiac muscles are involuntary.\nMuscles can move in two ways. They can either contract or pull. Many muscles are set up to work in pairs. O..

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Why are skeletal muscle cells multinucleated?

Animals and humans consciously control their skeletal muscles. The University of California, San Diego, describes skeletal muscle cells as long, tube-like cells that work in conjunction with numerous other cells. A given muscle, such as the bicep, contains thousands of individual muscle cells that all work together.\nSkeletal muscles function by contracting when stimulated. The University of California, San Diego explains that this stimulation usually takes the form of an electrical impulse from the nervous system, but other stimuli may also cause muscles to contract. Muscles do not have a dis..

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What is the reaction between acetic anhydride and water?

Acetic anhydride, also called acetyl ether or ethanoic anhydride, is a compound with the chemical formula C4H6O3 and a molecular weight value of 102.08. It appears as a clear, colorless liquid that has a pungent vinegar odor. Apart from being highly reactive to water, acetic anhydride is also flammable, generating dangerous vapours when heated.\nAs a volatile compound, acetic anhydride does not cause severe skin irritation, unless it gets in contact with wet clothes. Prolonged exposure to this chemical increases the risk of skin and eye burns, irritation of the respiratory tract, nausea and vo..

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What are some examples of gymnosperms and angiosperms?

Gymnosperm means "naked seed," although the seeds of these types of plants aren't found in fruit as they are in angiosperms. Most gymnosperm are trees, shrubs or climbers and can have broad leaves like cycads, or narrow and fine leaves like conifers. Most of them are evergreen. Larches and baldy cypress trees are two of the few conifers that are deciduous.\nCycads look like palm trees, but they're not. Palm trees are angiosperms, as they produce fruit and flowers. Cycads have male and female cones that grow on different trees.\nGinkgos are a very old species of tree. Individuals can ..

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Can you pull a muscle in your chest?

Other causes for a pulled chest muscle include the rapid, heavy breathing that accompanies a panic attack; however, chest pain can also be a warning sign for some more serious conditions, including gallbladder issues, esophageal reflux, a peptic ulcer, a heart attack and a blood clot lodged in the lung, according to Mayo Clinic. Any person suffering from chronic chest pain should schedule an appointment with a physician as soon as possible.

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How many light-years is Jupiter from Earth?

The fifth and largest of the solar planets, Jupiter orbits the sun at a distance that is more than five times greater than that of the Earth's distance from the sun. Since both planets travel around the sun in an elliptical path, the distance between Earth and Jupiter can range from 365 million to 601 million miles. Jupiter emits no light of its own and is only visible from Earth due to reflected sunlight.

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How do the four spheres interact with each other?

The Earth system consists of rocks, magma and core, called the lithosphere; all of its water as liquid, ice or gas, called the hydrosphere; the atmosphere or air; and living organisms, called the biosphere. The spheres get their energy and power from the sun and Earth's internal heat.\nAn event is a change to a sphere or the effect of a change in one sphere on a contiguous sphere. When an event in one sphere affects another sphere, it is called an interaction.\nA classic example of an interaction between spheres is when a plant (part of the biosphere), takes carbon dioxide from the atmosp..

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How do natural environments affect human actions?

The potential dangers of a natural environment also affect human actions. For example, individuals living in the portion of the central United States nicknamed "tornado alley" know their safety depends on tornado shelters, evacuation plans and tornado siren systems. According to the City of Oklahoma City website, proper tornado preparation saves many lives annually.\nVolcanic eruptions, landslides and earthquakes are also potentially dangerous factors in the natural environment. The size and volatility of a volcano determine the minimum safe distance for human settlements. About.com expert And..

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Can metals be non-magnetic?

Non-magnetic metals, or non-ferrous metals, are metals that do not have an appreciable amount of iron in their composition. These metals can be pure metals or combinations of metals, such as gold, aluminum, beryllium, led, magnesium, nickel, platinum, zinc and copper. While people usually associate metals with being magnetic, only metals with iron in their composition are classified as magnetic. Non-ferrous metals are usually more expensive than their ferrous (or iron-based) counterparts. Properties of non-ferrous metals and alloys include high conductivity, lower weight, higher strength, resi..

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