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What are the ingredients in fireworks?

The exterior casing of commercial fireworks is constructed of tubes, hollow spheres and paper, which create a barrier to hold all of the main ingredients inside. The shells contain a mixture of several different powdery chemicals that work together to create a visual effect as well as whistles and bangs. Loud booms come from flash powder, and different metals and oxides combine together to create sound.

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What is the equation for tension in a rope?

Tension is the force of a body acting on a string, cable, rope or another object. The formula for tension remains the same regardless of the body acting or the body being acted upon. For the equation of tension in a rope, weight (W) is equal to the mass of the object (m) multiplied by the acceleration of gravity (g). Because of this, the equation can also be given as T = mg + ma. Tension is a force, so the results given through the formula are expressed in newtons and denoted with the symbol N.

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What are the major functions of the immune system?

Many different parts of the body combine to make up the immune system. Lymph nodes, the spleen, bone marrow, lymphocytes and leukocytes all play key roles in immune function. Lymph nodes are small, bean-shaped structures that are found all through the human body. They store immune cells that fight infection and disease to keep the body healthy. The lymphatic system drains into the lymph nodes and brings all foreign antigens to the lymph nodes to be processed.\nThe spleen is full of white blood cells that fight off disease and infection. The spleen also recycles old red blood cells and removes ..

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What is a polysaccharide?

Polysaccharides may range from linear to highly complex in structure. There are two types of plant starches: amylose and amylopectin. Amylopectin is branched while amylose is not.\nAmylose is a helical chain made of glucose monomers, bonded together by glycosidic linkages. Amylose can be found in plants such as potatoes and used as a primary energy source for humans. Amylopectin can also be used as a primary energy source for humans.\nGlycogen is a storage polysaccharide found in animals. It is similar to amylopectin but is more highly branched, and its molecules are tighter. Glycogen can be u..

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What is the difference between macronutrients and micronutrients?

According to the Centers for Disease Control (CDC), a balanced diet contains carbohydrates, proteins and fats as well as essential vitamins and minerals. Eating foods from the six major food groups provides most people with the macronutrients and micronutrients they need.\nCarbohydrates provide glucose, the fuel that provides the body with energy. Examples of carbohydrates include fruits, vegetables, cereals, breads and grains. Foods that contain added sugar, such as cookies, cakes and sweetened milk products, also contain carbohydrates. The CDC recommends that Americans consume fewer calories..

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What is the purpose of folic acid in the body?

Folic acid can help correct low folate levels in the body, as well as treat anemia and inadequate nutrient absorption. Folic acid is also used to treat memory loss, ulcerative colitis, liver disease, kidney dialysis, claims WebMD.\nMarch of Dimes also recommends that women of childbearing age take folic acid on a regular basis, as it can prevent birth defects, specifically neural tube defects, yet only if taken before and during the pregnancy. Because nearly half of all pregnancies in the United States are unplanned, states the March of Dimes, it is important that women take folic acid regular..

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Who is the father of chemistry?

At the time of Mendeleev's work on the periodic table, only 56 elements were known to chemists. By observing that many of an element's properties could be predicted by their atomic weight, Mendeleev was able to organize the known elements by weight and valence. This arrangement left several gaps that Mendeleev predicted would be filled by yet-undiscovered elements. When this proved to be true, the periodic table became central to the scientific theory of chemistry.

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What symbols are used in an electrician's work?

Electrical symbols become more complicated after the basic electrical wire and connected wire symbols. In electrical diagrams, one might find what looks like half of a vertical dumbbell pointing downward. The name of this symbols is Earth ground, and it is used a reference for zero potential and protection from electrical shock.\nA resistor is represented by a zig-zagged horizontal line with two open circles on each end. It means that a resistor is present and is reducing the current flow of electricity. A resistor can also be represented by a rectangle with two horizontal lines on each end.\n..

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What are the Dugway Geode Beds?

Volcanic activity occurred in western Utah 6 to 8 million years ago, which left behind rhyolite, an igneous extrusive rock. Cavities formed inside the rhyolite because of trapped gases, and after millions of years of water circulation on the ground, minerals developed inside the cavities. These minerals are called geodes. They have a spherical shape and a crystal lining. Approximately 32,000 years ago, much of western Utah was covered by a large body of water called Lake Bonneville. The wave activity in the lake eroded the rhyolite and relocated the geodes several miles away in the Dugway Geod..

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What is bigger: MB or KB?

A megabyte is one thousand times larger than a kilobyte. The prefixes mega- and kilo- are used by a metric system of counting which is based on powers of ten. "Mega" comes from a Greek word "megas", which translates as "great". In metric systems, "mega-" denotes one million. "Kilo" comes from a Greek word "chilioi", meaning "thousand". Other common uses of "kilo-" include kilogram, which is one thousand grams, and kilometer, which is one thousand meters.

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