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How does a dry ice bomb work?

Dry ice generates large volumes of carbon dioxide when it sublimes. One ounce of solid carbon dioxide forms approximately 15 liters of gaseous carbon dioxide. Therefore, dry ice heated in an enclosed space will generate sufficient pressure to violently rupture its container. The resulting explosion generates a supersonic shock wave that can be extremely loud, and ejects shrapnel and debris at a high rate of speed.\nSince dry ice bombs require manual mixing of the two components, there is a high probability of premature explosion with the potential to injure or kill the person handling the devi..

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How does altitude affect temperature?

Air pressure drops to about 1.6 pounds per square inch at 50,000 feet above sea level. Air pressure is created when gravity acts on the many miles of air molecules comprising the atmosphere. Air pressure is not uniform worldwide; it can change over time. Desert regions typically have lower air pressure than other areas because the hot desert air is less dense than cool air.

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Where is the basement membrane located?

Information from the University of Leeds states that the basement membrane is also known as the basal lamina. It serves a number of roles in the body. It surrounds some cells, such as muscle cells, which are all separated by the basement membrane. It can also separate whole sheets of cells, as it does in the kidneys, where it actually aids in the filtering of blood.

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How do cells obtain nutrients?

Nutrients must first be broken down through chewing and enzymes located in both the stomach and small intestine. Cells in the small intestine wall are the point where most nutrients enter the bloodstream. Enzymes work to modify the molecular structure of cells for absorption in the small intestine itself and in the cells which form its wall.\nThe membrane of a cell contains both an entry and an exit side, and both sides employ the use of proteins as nutrient doorways. This system of nutrient transportation is either passive or active, although sometimes passive transport concerns nutrients tha..

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What household item weighs 1 gram?

Other items that weigh 1 gram include a pinch of salt, one-fifth of a piece of paper and one Japanese yen coin. The gram, originally the base unit of the French metric system, is roughly equal to the mass of 1 cubic centimeter of pure water at 4 degrees Celsius and was originally measured by this standard. Later, the gram was calculated against the physical prototype maintained by the International Bureau of Weights and Measures. It is a single unit in the larger International System of Units, the modern form of the metric system.\nGrams are used as standard measurements for solid and semisoli..

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What is the definition of "mitochondria"?

Mitochondria are organelles, membrane-bound structures that perform specific functions within a cell. Cells vary in the number of mitochondria they have, depending on their energy needs. If a cell needs more energy to be produced, then the mitochondria make more of themselves by dividing in two.\nA normal animal cell may have between 1,000 to 2,000 mitochondria. Muscle and fat cells have many mitochondria, as they have high energy needs and must store energy. Respiration is the process by which mitochondria produce energy in the form of a molecule called ATP.

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What is bilirubin?

Indirect bilirubin is found in the blood stream and is also called unconjugated bilirubin. It takes the old red blood cells to the liver for processing. At this point the bilirubin does not dissolve in water.\nDirect, or conjugated, bilirubin is the substance created by the liver. The bilirubin is changed from the insoluble form to a soluble substance that can be absorbed and disposed of by the bowel. Since red blood cells are being replaced constantly, both types of bilirubin are needed, in the correct proportions, for healthy bodies.\nIf patients display signs of jaundice, such as a yellow t..

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What are the enemies of hippos?

Although lions have attacked hippos before, as evidenced by National Geographic, it doesn't happen often because it puts lions at risk for significant injury. Humans are another danger to hippos. People hunt them largely for their ivory teeth and hides.\nOne of the reasons hippos have so few enemies is because of their naturally thick hides. Their skin can weigh up to 1,000 pounds alone and is especially thick on the vulnerable back and rump areas.\nHippos never sweat. Instead, they loll about in water or mud to remain cool. There is a myth that hippos sweat blood, which is false. However..

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What is the melting point of benzocaine?

For example, Hurricaine topical anesthetic, a liquid preparation of benzocaine, is 20 percent benzocaine dissolved in polyethylene glycol 400, an inert solvent. Other liquid preparations of benzocaine use ethyl alcohol or a water-based solution. Solid benzocaine is a white powder that has limited solubility in water. It much more easily dissolves, in order of greatest solubility to least, in chloroform, ether and alcohol; it is also soluble in dilute acids.

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How does a brushless generator work?

The current requires that both electromagnets be imbued with an exciter current in the form of a DC feed. The exciter hardware rotates within the generator and transfers that energy to the magnets. Where the two designs differ is at the point of DC transfer to the stator and exciter. A brush system employs rotating brushes to build up a static charge that can then be transferred to static slip rings that are kept in contact with the brushes, according to EmergencyPower.com.\nA brushless generator, in contrast, typically uses a solid-state rectifier assembly in place of the brushes and rings. T..

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