4085893
Description
Flashcards by Shannon Darby, updated more than 1 year ago
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Created by Shannon Darby
about 9 years ago
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| Question | Answer |
| All matter is composed of atoms. Atoms are single units of special substances called ________? | Elements (Contain only one type of atom) |
| What does the atomic structure of an element determine? | The chemical behavior (The way it interacts with other elements) |
| What are a few of the 104 naturally occurring elements? | Hydrogen, oxygen, carbon, copper, lead, silver and gold. |
| Atoms of elements unite to form more complex structures called _________. | Molecules ~Most matter is composed of molecules that contain 2 or more atoms ~The arrangement & structure of molecules are unique & determine the characteristic of that material |
| Thousands of substances can be produced by chemically or physically combining different proportions of basic elements. Such combinations of elements are form either a ________ or _______. | Compounds or Mixtures |
| Explain: Compounds | Is the product of 2 or more atoms that unite chemically. This creates a substance that has properties different from those of the combining elements. example: Water is a compound of hydrogen and oxygen. |
| Elements in a compound are always in ________ proportions. Page 2-2 | Definite |
| Explain: Mixture | 2 or more elements or compounds.. Unlike compounds a mixture can be formed using varying proportions of each ingredients. Example: "Concrete" the mixture of cement, water and aggregate may vary but the mixture is still concrete. However the ratio may effect strength. |
| Explain: Alloys | Alloys are mixtures of metal with other metals and non-metals. Brass is copper + zinc |
| Define: cyclic loading | Cyclic loading - the application of repeated or fluctuating stresses, strains, or stress intensities to locations on structural components. The degradation that may occur at the location is referred to as fatigue degradation |
| Babbitt Metal | AKA White Metal - soft, white non-ferrous alloy used to provide a bearing surface. It has properties that help reduce friction which make it a good material to use in a plain bearing |
| Define: Non-Ferrous | Generally more expensive than ferrous metals, non-ferrous metals are used because of desirable properties such as low weight (e.g., aluminium), higher conductivity (e.g., copper), non-magnetic property or resistance to corrosion (e.g., zinc) |
| What kind of metal alloy is used for aircraft? | Aluminum-Magnesium Alloy |
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