Harmful Chemicals in our Environment Over the past century humans have introduced a large number of chemical substances into the environment. Some are the waste from industrial and agricultural processes. Some have been designed as structural materials and others have been designed to perform various functions such as healing the sick or killing pests and weeds. Obviously some chemicals are useful but many are toxic and their harm to the environment and our health far outweighs their benefit to
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A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electromagnetic force attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds" such as dipole-dipole interactions‚ the London dispersion force and hydrogen bonding
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Hovercrafts are used throughout the world as specialized transports. They can also be used after a natural disaster for emergency purposes. Because they are supported by a cushion of air‚ hovercraft are unique among all other forms of ground transportation in their ability to travel equally well over land‚ ice‚ and water. Small hovercraft are used for sport or passenger service‚ while giant hovercraft have civilian and military applications‚ and are used to transport cars‚ tanks‚ and large equipment in hostile
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Chemical Formula Principles Chemical Formula is a system of chemical notation that was invented in 181 by John Jakob Berzelius. The system is based on the law of definite proportions”‚ states that all samples of a given chemical compound have the same elemental composition. It is also a way of expressing information about the proportions of atoms that constitute a particular chemical compound‚ using a single line of chemical element symbols‚ numbers‚ and sometimes also other symbols‚ such as
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Hair coloring or lightening is the practice of changing the color of hair. During lightening‚ hair goes through various stages until it reaches the ideal orange/gold color. Lightening time varies‚ depending on natural hair color. The darker the hair‚ the longer the lightening time needed. Medium brown hair on average takes somewhere around 40 minutes to lighten. Dark brown hair takes somewhere around fifty minutes to lighten. Darkest brown hair takes around sixty minutes to lighten. And black hair
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Chemical Engineering In the future I would like to become a chemical engineer. I really enjoy chemistry and hands on work “Chemical engineering is the application of chemistry to large scale industrial systems.” (Chemical engineering). I enjoy helping build different things like skateboards‚ ramps and‚ fixing parts on different things. When I took the sixteen personality quiz it said I was a virtuoso. The virtuoso likes hands on work and exploring ideas which I think fits my personality perfectly
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has the strongest supplier monitoring program because they periodically evaluate and modify standards based on feedback. Prior to contracting any supplier‚ Wal-Mart required the suppliers to review and sign a supplier agreement‚ which incorporated an expectation that the supplier would comply with Wal-Mart’s “Standards for Suppliers.” Wal-Mart invested in establishing standards for its suppliers and implemented an ethical standards program that helps Wal-Mart monitor its suppliers regarding whether
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Physical properties are properties that can be measured and seen in an object. An example of a physical property of an object would be the color‚ mass‚ solubility‚ volume‚ or the polarity of an object. A physical property can change the appearance of an object‚ but that does not mean that the chemical composition has to change. The chemical composition can remain the same. Physical properties are separated into two different categories. They are separated in to intrinsic properties and
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DEPARTMENT OF CHEMICAL ENGINEERING Indian Institute of Technology Madras Chennai – 600 036 CH 3080 Process Equipment Design Problem set – IA 1. Crude oil‚ specific gravity of 0.887‚ flows through the piping shown in Figure. Pipe A is 50-mm Schedule 40‚ pipe B is 75 mm Schedule 40‚ and each of pipes C is 38-mm Schedule 40. An equal quantity of liquid flows through each of the pipes C. The flow through pipe A is 6.65 m3/h. Calculate (a) the mass flow rate in each pipe‚ (b) the average linear
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Win Some Lose Some Casinos are more and more common in small communities. With this being said small communities are changing into a gambling economy. There are both negative as well as positive impacts of casino gambling on the economy. In some cases the positive aspects outweigh the negative. Casinos are good sources of economic development‚ creating jobs and providing resources needed to build a better economy. A casino is a good choice as to help with economic development. This is a great
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