pumping storm water in civil and environmental. They are an integral part of engineering and an understanding of how they work is important. Pumps are devices that transfer mechanical energy from a prime mover into fluid energy to produce the flow of liquids. There are two broad classifications of pumps: positive displacement and dynamic. Dynamic Pumps Dynamic pumps add energy to the fluid by the action of rotating blade‚ which increases the velocity of the fluid. Figure 1 shows the construction
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Longitudinal and transverse waves Sound is transmitted through gases‚ plasma‚ and liquids as longitudinal waves‚ also called compression waves. Through solids‚ however‚ it can be transmitted as both longitudinal waves and transverse waves. Longitudinal sound waves are waves of alternating pressure deviations from the equilibrium pressure‚ causing local regions of compression and rarefaction‚ while transverse waves are waves of alternating shear stress at right angle to the direction of propagation
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content increases compressive strength or vice versa or increasing Viscosity Modifying Agent (VMA)‚ will alter its compressive strength. Nowadays there are many construction firms which are using self-compacting concrete (SCC). It is used when a structure is constructed with a large quantity of reinforcement‚ compacting manually will be difficult to avoid honeycombs or voids. Materials that were used for this kind of concrete are Viscosity-Modifying Agent (VMA) that will make the SCC stable‚ pozzolanic
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Carbon nanotubes Bond polarity and intermolecular forces • Electronegativity and bond polarity • Van der Waals’ forces • Factors affecting the strength of van der Waals’ forces • Hydrogen bonding • Surface tension and viscosity of liquids Topic 6 Microscopic World II Unit 23 Shapes of molecules Unit 23 23.1 23.2 23.3 23.4 23.5 23.6 23.7 Shapes of molecules Covalent molecules with non-octet structures Shapes of molecules of methane
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double bond among the carbon atoms‚ the fatty acid molecule is unsaturated. What form does each of these fats take at room temperature and what are the common sources of each? Saturated fats are solid at room temperature and unsaturated fats are liquid at room temperature. A common source of saturated fat is tallow‚ lard‚ and butter. Common sources of unsaturated fat are canola oil‚ corn oil cottonseed oil‚ and soybean oil. What is your hypothesis? I believe that we will extract less saturated
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Emerson Flow and Density Measurement Best-in-class technology for outstanding results Emerson Flow and Density Measurement Technology Committed to Your Success Emerson’s best-in-class Micro Motion® and Rosemount® flow and density measurement technologies‚ wide breadth of products‚ and unmatched value ensure you will realize outstanding results in your process and operation. Technology Leadership Decades of application experience ensure Emerson truly understands customer measurement challenges
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early “cooking” methods‚ modern separation involves piping oil through hot furnaces. The resulting liquids and vapors are discharged into distillation towers‚ tall‚ narrow columns that give refineries their distinctive skylines. Inside these towers‚ the liquids and vapors separate into components or fractions according to weight and boiling point. The lightest fractions‚ including gasoline and liquid petroleum gas (LPG)‚ vaporize and rise to
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coverage Relative humidity in the pressroom Ink film thickness Problems caused by ink drying too fast Can cause problems with gravure and flexo Ink viscosity and the factors affect the viscosity The ability to resist flow Affected by temperature and agitation Thixotropic property of paste ink? Viscosity decreases with shearing and agitation Viscosity increases when shearing and agitation stopped Ink tack and the problem caused by high ink tack on printing The
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EMULSION An emulsion is a mixture of two or more liquids that are normally immiscible ( non mixable). Emulsions are part of a more general class of two-phase systems of matter called colloids. Although the terms colloid and emulsion are sometimes used interchangeably‚ emulsion should be used when both the dispersed and the continuous phase are liquids. In an emulsion‚ one liquid (the dispersed phase) is dispersed in the other (the continuous phase). Examples of emulsions include milk‚ mayonnaise
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Volcanoes Have Different Characteristics? A. Formation of Lava Magma is formed by melting preexisting rock in Earth’s interior For magma to rise through crust it must be: (1)less dense than the crust (2) runny enough to flow (3) hot enough to stay liquid Magma that cools to form solid rock = lava B. Composition of Magma/Lava Magma is composed of various proportions of: Oxygen‚ Silicon‚ Aluminum‚ Iron‚ Calcium and Potassium Mineral – naturally occurring element or compound that has an ordered internal
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