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What different colors of mold are there?

There are many types of mold. Indoor mold is potentially harmful and should be eliminated when spotted. Black mold is the most harmful. Spores from outside can affix themselves to people, clothes, shoes, pets and anything else that provides an opportune conveyance for getting indoors. Mold can only grow indoors when spores land on wet surfaces. Mold cannot grow without moisture, so areas with leaky pipes and other wet spots are likely areas for mold to grow.\nMold can potentially cause health problems. It produces allergens and, in some cases, potentially toxic substances. Inhaling or touching..

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What is the function of surfactant?

Surfactant allows alveoli to stay open and compliant during both inspiration and expiration. During inspiration, alveoli may collapse if they do not contain surfactant. If they collapse, then gas exchange across the alveoli wall cannot occur. Surfactant allows the alveoli to stay open and gas exchange to occur. During expiration, both lungs have the tendency to collapse. If they do collapse, then it takes great effort to re-inflate them.\nSurfactant prevents the lungs from collapsing by reducing surface tension throughout the lungs. Surface tension is the main force that is present within the ..

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What is the function of a nucleus?

The hereditary information stored in the nucleus controls the cell's growth, reproduction, intermediary metabolism and protein synthesis. Less complex organisms, such as one-celled microbes, do not have a nucleus. All their genetic information is stored in their cytoplasm. The nucleus is only found in complex cells known as eukaryotes. It is located in a membrane called the nuclear envelope, separating the nucleus from the surrounding cytoplasm in the cell. Holes in the nuclear envelope allow for the transfer of specific molecules from the cytoplasm to the nucleus. This transfer of molecu..

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What are outer shell electrons called?

Atoms want to fill their outer energy shells. In most cases, atoms would need eight electrons to fill their outer energy shells. Elements that have few electrons in their outer shells, such as the metals, are more likely to give up those electrons to other atoms to form a more stable arrangement. Elements such as the nonmetals have almost the full complement of electrons in their outer levels, so they tend to gain electrons during the formation of compounds.\nAtoms can also share electrons with one another, meaning that the electrons spend part of the time orbiting around each atom of the comp..

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What is the correlation between time and motion?

Motion conceptually requires time, as well as space. A state of motion is defined by the velocity of the object, that is, by its speed and direction. Speed is measured by the time an object takes to go over a certain distance. Hence, motion cannot occur in a timeless universe.\nSimilarly, time requires two different states in order to be measured. In a completely motionless universe, there would not make sense to say that a second, a year or a quadrillion centuries have passed, because there are no reference points (two distinct states of motion of the same object) to measure time.\nJust the p..

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How do you measure the water flow through a pipe?

Piston meters involve a piston rotating within a chamber with a known volume. Each rotation occurs when a set volume of water passes through this chamber. Through a gear mechanism or a magnetic drive, the rotation is measured and displayed as a flow rate. Nutating disk meters have a disk that wobbles about a vertical axis when water flows through it. Gearing connected to the disk registers the volume flow within an accuracy of 1 percent. Turbine flow meters operate in a similar manner to the piston meter; the flow of water rotates the turbine around an axis which gets displayed as a flow rate...

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How many times bigger Is Jupiter than Earth?

Jupiter's circumference at the equator, the widest latitude of the planet, is 272,945.9 miles, while the Earth's equatorial circumference is 24,873.6 miles. The inner core of Jupiter is roughly the same size as the entire Earth. In addition to volume and circumference, Jupiter is also more massive and has a greater surface area than the Earth. However, Jupiter is only about one-quarter as dense as Earth.

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Do foxes eat snakes?

Foxes tend to search for food in areas where forests and fields meet. With their keen sense of smell, foxes nose out their prey and pounce. Foxes also obtain food through scavenging, or eating carcasses they encounter. However, sometimes a hungry fox steals part of a meal from a bear or wolf. A fox's food does not always come from the wild. Although foxes do not attack pet cats and dogs, they do prey on domesticated birds.

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Why are noble gases not reactive?

The six noble gases are helium, neon, argon, krypton, xenon and radon. While they are all highly unreactive, the heavier elements of the group do sometimes form compounds under certain conditions. The inner electron shells of these elements form a sort of shield around the nucleus, allowing the gases to be ionized with sufficient energy. When this occurs, they can form compounds, most often with highly reactive halogen gases. One example is xenon hexafluoride, a xenon ion bonded to six fluoride ions. They also form compounds under very high pressure, which helps store them more compactly when ..

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What is the chemical formula for chromium iodide?

The number of iodine atoms differs depending on the chromium ion because the charges in the equation must balance out. Iodine carries a charge of -1, so chromium(II) requires two iodine atoms to balance out its charge. Chromium(III) requires three iodine atoms to neutralize its +3 charge. To determine the formula for chromium iodide, the charge of the chromium ion must be known.

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