Metals are electropositive chemical elements that are characterised by the following qualities: ductility, malleability, luster, opacity, and conductance of heat and electricity.

). Metals: Metals are electropositive chemical elements that are characterised by the following qualities: ductility, malleability, luster, opacity, and conductance of heat and electricity. They can replace the hydrogen of an acid and form bases with hydroxyl radicals. Density is defined as a material's mass divided by its volume. Metals typically have relatively high densities, particularly when compared to polymers. Often, materials with high densities contain atoms with high atomic numbers, such as gold or lead. However, some metals such as aluminum or magnesium have low densities. These metals are useful in applications requiring other metallic properties but in which low weight is also beneficial. Fracture Toughness can be described as a material's ability to avoid fracture, especially when a flaw is introduced. Glass, for example, has low fracture toughness (although it exhibits high strength in the absence of flaws). Metals typically have high fracture toughness. Metals can generally contain nicks and dents without weakening very much. They are also impact resistant. A football player relies on this fact to ensure that his facemask won't shatter. The roll cage on a racecar, for example, is created from steel. This steel should remain intact in a crash, protecting the driver. The ability of a material to bend or deform before breaking is known as plastic

  • Word count: 8601
  • Level: University Degree
  • Subject: Engineering
Access this essay

CO2 Emmisions

Final Research Proposal 1 Decarbonizing Transportation and Logistics through Policy and Technology Assignment 08: Week 8 Final Research Proposal Jacob Kellerman Research Methods in Transportation and Logistics Management, TLMT 525 B001, Winter 2010 Wednesday, February 17, 2010 Final Research Proposal 2 Table of Contents I. Introduction.............................................................................................................................................p. 4 i. Statement of Problem and Significance of Study................................................................p. 4 ii. Purpose of Study.......................................................................................................................p. 5 iii. Hypothesis and Research Questions......................................................................................p. 5 iv. Procedures.................................................................................................................................p. 6 v. Ethical Issues..............................................................................................................................p. 8 II. Literature Review....................................................................................................................................p. 9 i. Climate

  • Word count: 6101
  • Level: University Degree
  • Subject: Engineering
Access this essay

Pulling things appart - The following experiment was designed to determine some of the mechanical characteristics of various materials. These included the stress strain characteristics, such as Young's Modulus, yield strength and tensile strength.

ENSC 330 LAB #1 PULLING THINGS APART Andy Somody 97300-6222 . Introduction The following experiment was designed to determine some of the mechanical characteristics of various materials. These included the stress strain characteristics, such as Young's Modulus, yield strength and tensile strength. We also performed experiments to determine the resistively, relative hardness, and toughness of the given samples. We then used the theory of material science to help explain the properties of our samples. Please refer to the lab hand out, "Pulling Things Apart" for the objectives, materials and procedures. 2. Observations The lab handout has specified that two of the provided samples are composed of the same material. In our case, it appeared on initial inspection that metal #1 and metal #2 were composed of the same metal. This initial observation will be supported by comparing the stress-strain characteristics of metals #1 and #2. The following observations were made before the samples were tested for their various physical properties. The measurements of length were made with a ruler, which have an uncertainty of ?0.01 cm. The measurements of width and thickness were both made using calipers, which have an uncertainty of ?0.002 cm. Black Polymer* Clear Polymer* White Polymer* Metal #1* Metal #2* Length 5.09?0.01 7.30?0.01 7.30?0.01 8.20?0.01 9.30?0.01

  • Word count: 6317
  • Level: University Degree
  • Subject: Engineering
Access this essay

Bridges And How They Work.

Different types of bridges Suspension: A type of bridge that is supported on huge steel cables anchored into the ground. Arch: A type of bridge which is a curved structure; strength comes from exerting force down and sideways against abutments. Trestle: A type of truss bridge typically used for travel by heavy trains; made from large numbers of trusses; built very tall and sturdy. Covered: A type of truss bridge developed to slow down the wear and tear on the bridge's structure by placing a protective cover over the deck. Truss: A type of Beam Bridge identified by the triangular shapes included in the framework. Beam: Simplest type of bridge: made from a straight section, which rests on two supports, one at each end of the beam. Cantilever: A type of Beam Bridge that gets its support from counter balanced beams meeting in the middle of the bridge rather than supports at each end. Moveable: A type of bridge that has the ability to change position and location. Pontoon: A type of moveable bridge that floats on the water. Swing: A type of moveable bridge with a middle section of the roadway that swings around a central pier to open up a passage for travel. Lift: A type of moveable bridge which works like an elevator; the roadway, which is attached to two columns, raises up vertically to allow for passage underneath. Bascule: A type of moveable bridge,

  • Word count: 1968
  • Level: University Degree
  • Subject: Engineering
Access this essay

Wire eood

CONCIO AD CLERUM: A SERMON: ON HUMAN NATURE, SIN, AND FREEDOM (1828) Nathaniel Taylor Ephesians 2:3. And were by nature the children of wrath, even as others. The Bible is a plain book. It speaks, especially on the subject of sin, directly to human consciousness; and tells us beyond mistake, what sin is, and why we sin. In the text, the Apostle asserts the fact of the moral depravity of mankind, and assigns its cause. To be "the children of wrath" is to possess the character which deserves punishment; in other words, it is to be sinners, or to be entirely depraved in respect to moral character. The text then teaches; THAT THE ENTIRE MORAL DEPRAVITY OF MANKIND IS BY NATURE. In illustrating this position, I shall attempt to show, First, In what the moral depravity of man consists; and Secondly, That this depravity is by nature. I [Moral Depravity Defined] By the moral depravity of mankind I intend generally, the entire sinfulness of their moral character-that state of the mind or heart to which guilt and the desert of wrath pertain. I may say then negatively, This depravity does not consist in any essential attribute or property of the soul-not in any thing created in man by his Maker. On this point, I need only ask-does God create in men a sinful nature, and damn them for the very nature he creates? Believe this, who can. Nor does the moral depravity of men

  • Word count: 2040
  • Level: University Degree
  • Subject: Engineering
Access this essay

Since 1992, biogenetically altered crops have been for sale to the American farmer, with genes borrowed from bacteria, viruses, insects a

Biogenetic Engineering: A Response to the Societal Needs of Mankind Joseph Bohn University of North Carolina- Greensboro Biogenetic Engineering: A Response to the Societal Needs of Mankind In the mid-1800's, the Irish potato famine, caused by the fungus Phytophthora infestans, killed more than a million people and resulted in massive Irish emigration to the United States. For centuries, farmers have struggled to battle insects, weeds and microorganisms that destroy their crops. So many major events in history have occurred as a result of plant disease epidemics or insect infestations. (Patlak 2000) For that reason, the benefits of biogenetic engineering are unquestionable. Today, many people believe that technology is both a friend and an enemy. On one hand, some say that it makes tasks easier, cleaner and helps us lead healthy lives. On the other hand, some say that it perpetuates a culture without moral foundation. (Postman 1992) Indisputably, the staggering growth of technology has emerged in response to the societal needs of man. (Durkheim 1973) Biogenetically engineered foods, insecticides, vaccines and medications-for instance-have greatly eased mankind's existence and our ability to efficiently produce many of the planet's rapidly depleting vital resources. By definition, genetic engineering involves the changing of genetic material in the DNA code of a living

  • Word count: 1787
  • Level: University Degree
  • Subject: Engineering
Access this essay

Selection Control and Repetition Control Structure

Selection Control and Repetition Control Structure University of Phoenix Mayada Set PRG/210 Fundamental of Programming with Algorithm and Logics Instructor Name: Guillermo A. Hernandez Date: May 15, 2009 Before writing a program to solve a problem, we must have a thorough understanding of the problem and a carefully planned approach to solving it. When writing a program, we must also understand the types of building blocks that are available and employ proven program construction techniques. A computer can process a program in one of three ways: in sequence; selectively by making a choice, which is also called a branch; or repetitively by executing a statement over and over, using a structure called a loop. Control structures provide alternatives to sequential program execution and are used to alter the sequential flow of execution. The two most common control structures are selection and repetition. In selection, the program executes particular statements depending on some condition(s). In repetition, the program repeats particular statements a certain number of times depending on some condition(s). Four types of selection control structure are simple selection, simple selection with null false branch, combine selection and nested selection. - Simple selection control structure is easy to understand and self-defining. The whole statement is base on a condition and

  • Word count: 931
  • Level: University Degree
  • Subject: Engineering
Access this essay

The effects of Drag

DEN 118-S ASPECTS OF AEROSPACE ENGINEERING The Effects of Drag Contents Page Introduction.............................................................................................................................................3 Experiment 1: Effect of Air Speed on Drag.........................................................................................5 Experiment 2: Effect of Surface Roughness on Drag.........................................................................8 Experiment 3: Effect of Streamlining on Drag....................................................................................10 Conclusion................................................................................................................................................12 References................................................................................................................................................13 Introduction Drag is defined as a mechanical force which is produced through the interaction between a solid body and a fluid [NASA]. The drag is generated through the difference in velocities of the interacting bodies (solid and fluid) therefore; there must be a form of motion from either the solid or fluid for drag to exist. It makes no difference whether the object moves through a static fluid or whether the fluid moves past a static solid

  • Word count: 2712
  • Level: University Degree
  • Subject: Engineering
Access this essay

litmus paper,purfication of a solvent, synthesis of the vat dye indigo, aspirin

Activity 2 - Use of Litmus paper Objective/Theory The main use is to test whether a solution is acidic or alkaline. Litmus paper can also be used to find out if a substance is neutral, a blue and red sheet of litmus paper is needed. Fro theory we know that blue litmus paper turns red under acidic conditions, red litmus paper turns blue under basic (i.e. alkaline) conditions and neutral litmus paper is purple in colour. Safety To reduce the risk caused by the chemicals I used appropriate PPE (personal protective equipment) which consisted of gloves, goggles and a lab coat. If there are any spillages alert the lab technicians. To stop the inhalation of any of the chemicals conduct the experiment in a fume cupboard. Apparatus list * Two 25cm3 glass beakers * Red and blue litmus paper * Dilute hydrochloric acid (HCL) * Dilute sodium hydroxide (NaOH) * Safety goggles * Lab coat * Safety gloves * Measuring cylinder Method . Firstly, I collected two 25cm3 glass beakers 2. Next, I placed 5cm3 of dilute hydrochloric acid in one beaker and in the other I placed 5cm3 of dilute sodium hydroxide. 3. Then, I collected two samples of red and blue litmus paper 4. Thereafter, I dipped one strip of each colour in each of the beakers. 5. Finally, I recorded my results in a table. Results table Colour of dry Litmus paper Litmus colour in HCl Litmus colour in NaOH Red

  • Word count: 1905
  • Level: University Degree
  • Subject: Engineering
Access this essay

Electronics - Designing Filter Circuits

DEN 109 Electrical Technology Lab Experiment 1: Designing Filter Circuits By Ali Asghari DEN 109 Electrical Technology Lab Experiment 1: Designing Filter Circuits Introduction The aim of this laboratory experiment was to devise a filter circuits using passive element which consisted of resistors and capacitors. In the experiment we had to design an active filter using operational amplifiers and operational amplifier elements. The filters had different acceptability range of frequencies. The filters are an electronic circuit which performs signal processing which intends to remove undesired signals to and from components but the filter will encourage the desired signals. Filters are used in communication systems to pass those frequencies containing the desired information and to reject the remaining frequencies which are not within the range we are looking for. In stereo systems, for example, filters can be used to separate a particular band of frequencies for increased or decreased emphasis by the output acoustical system such as amplifier, speaker, etc. Filters are employed to filter out any unwanted frequencies, generally called noise, due to the nonlinear characteristics of some electronic devices or signals picked up from the surrounding medium. The experiment is to design the filters and consequently look at the difference between the two types of filters using

  • Word count: 3108
  • Level: University Degree
  • Subject: Engineering
Access this essay