from top of the burette and to the bottom‚ the average volume of each of the water droplet and the volume of NaOH needed to neutralise the benzoic acid in aqueous solution. From the volume collected for 50 droplets surface area and radius is calculated for a droplet. The uses of the surfaces area and volume help to determined the concentration of benzoic acid in kerosene‚ mole of benzoic acid transferred‚ molar flux and mass transfer coefficient. 2.0 Theoretical background The background
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stream of vapor-free gas is passed. A water bath is provided for maintaining a steady temperature so that there is no eddy current in the vertical tube and mass transfer takes place from the surface by molecular diffusion alone. The rate of evaporation can be followed by the rate of fall of the liquid surface. A traveling microscope is provided for determining‚ the liquid fall. With the knowledge of the concentration gradient‚ the diffusivity of the vapor of the volatile liquid can then be calculated
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probes successfully landed on the surface of the Venus. However‚ the essential equipment on probes was damaged‚ leading to that it failed to get insight into the surface of the Venus. While‚ on 17th August 1970‚ with the experiences from the previous two attempts‚ "Venus 7" lander completed their missions on the surface of the Venus successfully. The lander gauged the atmospheric pressure on the surface of the Venus‚ which illustrated that the pressure on the Venus’ surface was at least 90 times stronger
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Advertisment Essay The advertisement I chose was an advertisement for the new Microsoft(TM) tablet called Surface. It is a commercial that gets its point across quickly‚ clocking in at exactly one minute and 37 seconds. The ad is quite effective in pulling the viewer in‚ with its ever-changing imagery. Being quick but full of information is a working formula that does a lot of good to help sell the product. Comes in‚ tells you what the product is all about‚ and leaves. This allows the information
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Chemistry For You by Laurie Ryan‚ it states "As you increase the concentration of the acid‚ there are more acid particles in the same volume. Therefore there is a greater chance of acid particles colliding‚ and reacting with more particles on the surface of the marble." So‚ this means that the higher the concentration of my acid the faster the reaction. Method I will weigh out one gram of marble chips using a balance and put it in a conical flask and add to it a concentration of 50cm3
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Mining is the process of digging beneath surface of the earth and extracting minerals and other useful geological materials. There are two main categories that mines fall into; surface mines and underground mines. Surface mines are effective at extracting minerals and geological materials that are close to the surface of the earth while underground mines are designed to extract minerals and geological materials that are deep beneath the surface of the earth. One of the most common materials that
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of the Ratio of Surface Area to Volume on Transformation Efficiency in Escherichia coli K-12 Eliana Pouchard‚ Steve Teng‚ and Cameron Wong Department of Microbiology & Immunology‚ UBC In the process of transformation‚ bact eria take up DNA fr om the environment through their cell wall. To induce competence in the cells‚ the DNA for uptake must first attach to the cell surface prio r to passing throug h the membrane. Previous studies on the effect of surface area on transformation
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SIMULATION OF RATCHETING BEHAVIOR BY FINITE ELEMENT METHOD M.Tech. Dissertation Submitted in partial fulfillment of the requirements for the award of the degree of Master of Technology by Ajit Gajanan Dongarkar Roll No. 00310601 under the guidance of Prof. P. Vasudevan and Prof. Amitava De Department of Mechanical Engineering Indian Institute of Technology Bombay. January 2003 1 Dissertation Approval Sheet This is to certify that the dissertation entitled “Simulation of Ratcheting
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Modern-Surface Mining When coal seams are near the surface‚ it may be economical to extract the coal using open cut (also referred to as open cast‚ open pit‚ or strip) mining methods. Open cast coal mining recovers a greater proportion of the coal deposit than underground methods‚ as more of the coal seams in the strata may be exploited. Large Open Cast mines can cover an area of many square kilometers and use very large pieces of equipment. This equipment can include the following: Draglines which
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perpendicular to or normal to the section is called the normal stress. Normal stress may be tensile or compressive. Tensile stress: stresses that cause pulling on the surface of the section‚ (particles of the materials tend to pull apart causing extension in the direction of force) Compressive stress: stresses that cause pushing on the surface of the section‚ (particles of the materials tend to push together causing shortening in the direction of force) Strain • If a bar is subjected to a direct
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