Module 4 DBA notes - 966 Words

A physical change is one that affects only the physical properties of a substance, while a chemical change alters a substance at the molecular level. Physical Properties: A property that can be observed or measured without changing the chemical identity of the substance. Physical properties can be categorized as either intensive or extensive. Reactivity: An element or compound’s reactivity is its ability or capacity to react, or bond, with another substance. As you continue through this course, you will observe and compare this particular chemical property in a variety of scenarios. Flammability: One type of chemical reaction, called combustion, involves the burning of various compounds and elements. Some substances are more†¦show more content†¦Most decomposition reactions require energy, usually in the form of heat or electricity, to be added in order for the reaction to occur. In a decomposition reaction, a single compound undergoes a reaction that produces more than one product. The following general equation illustrates decomposition reactions: AB → A + B AB is a compound made of two or more elements. A and B are individual elements or compounds. Types of Decomposition Reactions: Binary compound, metal carbonate, metal chlorate, metal hydroxide, oxyacids In a combustion reaction, a compound or element reacts with oxygen, releasing a large amount of energy in the form of light and heat. --they are exothermic, which means that energy is released by the reaction. Many combustion reactions involve the burning of organic compounds called hydrocarbons, compounds containing the elements carbon and hydrogen, or other organic compounds. When a hydrocarbon is burned completely, the products of the combustion reaction are usually carbon dioxide and water. Natural gas, propane, and wood all burn to produce carbon dioxide and water as the products. Not all combustion reactions involve organic compounds made of carbon and hydrogen (nonorganic compounds), which means that the products are not alwaysShow MoreRelatedData Analysis And Data Of Data1229 Words   |  5 Pagesseveral types of tasks those are Safety Modules , Flight Capacity, Flight scheduling, Passengers Reservation History. EXTERNAL SOURCE : The external source system will maintain the data of Airport Space , Atmosphere conditions, FAA Directives(FAA- Federal Aviation Administration) A-3) The examples for external data sources which are used by banks: †¢ Knowing the Foreign Exchange currency rates †¢ Taking SQL DBA help to store the bank data. 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