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Answer the following questions: 1. How many elements have been identified? 2. One of the uses of steel is in constructing buildings. (Answer in true or false) 3. Why is not silver used very much in wiring? (Choose the correct answer(s) a. It is a good conductor. b. It is expensive. c. It is a bad conductor. 4. How can we change the form of any matter? 5. "Most items in use today are made of alloys instead of pure metals", explain why and give example(s).

Answer the following questions: 1. How many elements have been identified? 2. One of the uses of steel is in constructing buildings. (Answer in true or false) 3. Why is not silver used very much in wiring? (Choose the correct answer(s) a. It is a good conductor. b. It is expensive. c. It is a bad conductor. 4. How can we change the form of any matter? 5. "Most items in use today are made of alloys instead of pure metals", explain why and give example(s).

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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QI: Read the following passage then answer the questions: Everything on the earth is consisted of molecules. These molecules are in form of solid, liquid, and gas. These elements are called matter. Hence, everything on our planet is called matter. The scientists had identified more than 100 elements on the earth. Most substances used everyday are made of more than one element. Water has two elements: hydrogen and oxygen. Water and any other matter, can be in the form of a solid (ice), a liquid, or a gas (steam). Its form depends on its temperature. It is possible to transform or change the form of any matter by raising or lowering its temperature. Metals in solid form are used extensively in the technical field. Steel is used in constructing buildings, bridges, and streets as well as in making small items to be used around the house. Aluminium is found in automobiles, housewares, and radio and TV sets. It is also used for all kinds of wiring, in tubing and connections, and in fittings. Copper and aluminium are commonly used for wiring since they are good conductors of electricity and can be bent easily to any shape. Silver is used in some technical areas because it is an excellent conductor, but it is really too expensive to use, except in special cases. Most items used today are made from alloys instead of pure metals. These substances are less expensive, whereas the cheaper metals can be combined with the more expensive ones to serve the same purpose. Brass is a common alloy made up of copper and zinc. Answer the following questions: 1. How many elements have been identified? 2. One of the uses of steel is in constructing buildings. (Answer in true or false) 3. Why is not silver used very much in wiring? (Choose the correct answer(s)) a. It is a good conductor. b. It is expensive. e. It is a bad conductor. 4. How can we change the form of any matter? 5. "Most items in use today are made of alloys instead of pure metals", explain why and give example(s).
Transcribed Image Text:QI: Read the following passage then answer the questions: Everything on the earth is consisted of molecules. These molecules are in form of solid, liquid, and gas. These elements are called matter. Hence, everything on our planet is called matter. The scientists had identified more than 100 elements on the earth. Most substances used everyday are made of more than one element. Water has two elements: hydrogen and oxygen. Water and any other matter, can be in the form of a solid (ice), a liquid, or a gas (steam). Its form depends on its temperature. It is possible to transform or change the form of any matter by raising or lowering its temperature. Metals in solid form are used extensively in the technical field. Steel is used in constructing buildings, bridges, and streets as well as in making small items to be used around the house. Aluminium is found in automobiles, housewares, and radio and TV sets. It is also used for all kinds of wiring, in tubing and connections, and in fittings. Copper and aluminium are commonly used for wiring since they are good conductors of electricity and can be bent easily to any shape. Silver is used in some technical areas because it is an excellent conductor, but it is really too expensive to use, except in special cases. Most items used today are made from alloys instead of pure metals. These substances are less expensive, whereas the cheaper metals can be combined with the more expensive ones to serve the same purpose. Brass is a common alloy made up of copper and zinc. Answer the following questions: 1. How many elements have been identified? 2. One of the uses of steel is in constructing buildings. (Answer in true or false) 3. Why is not silver used very much in wiring? (Choose the correct answer(s)) a. It is a good conductor. b. It is expensive. e. It is a bad conductor. 4. How can we change the form of any matter? 5. "Most items in use today are made of alloys instead of pure metals", explain why and give example(s).
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