Volume loss is one of the three aspects of facial aging (the other two being skin texture changes and sagging skin). These aspects of facial aging combine as we get older to make us look older and more tired than we want to look. The severity and quickness that we show aging depends on both genetics and our environment and lifestyle. Volume loss‚ also known as fat loss‚ occurs when we lose fat in our face. It is most pronounced around the eyes and cheekbones. When someone says that as they have
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Rates of Reaction Coursework Aim: To find out how different concentrations of sodium thiosulphate (Na S2 O3) affects the speed of its reaction with Hydrochloric acid (HCL). Introduction When Sodium Thiosulphate and Hydrochloric acid react they produce a cloudy precipitate. Both of the chemicals are clear solutions and they react together to form a yellow precipitate of sulphur‚ the equation for this reaction is: Na2 S2 O3 + HCL‚ H2 O + NaCL + SO2 + S Sodium Thiosulphate + Hydrochloric
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Introduction Molar volume is the name given to the volume that one mole of any gas occupies at standard temperature and pressure. In chemistry‚ many of the materials worked with are gases. It is often easier to measure the volume of a sample of gas‚ rather than determine its mass. The main purpose of this lab is to determine the molar volume of hydrogen gas experimentally in order to compare it to the theoretical molar volume of ideal gases. In this experiment‚ a known mass of magnesium is reacted
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Investigating Ratios of Areas and Volumes In this portfolio‚ I will be investigating the ratios of the areas and volumes formed from a curve in the form y = xn between two arbitrary parameters x = a and x = b‚ such that a < b. This will be done by using integration to find the area under the curve or volume of revolution about an axis. The two areas that will be compared will be labeled ‘A’ and ‘B’ (see figure A). In order to prove or disprove my conjectures‚ several different values for n will
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Abstract Molar volume is the volume that one mole of gas occupies when temperature and pressure are kept constant. The molar volume of a gas can be determined through evaluating how much gas is given off when the number of moles of the substance is known. To find the volume of gas that will be used to calculate the molar volume‚ the process of water displacement can be used. Reference Citation Cesa‚ J. (2002). ChemTopic labs: Experiments and demonstrations in chemistry (vol. 9). Batavia
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Lab Report 6: Respiratory Physiology Purpose: To describe the effects of carbon dioxide concentration on blood pH. Hypothesis: If the blood CO2 levels increase‚ the pH will decrease. Materials and Procedures: Materials: Willing subject (someone complete the activities of the experiment) Timer (with a second hand) Glass Urinary and Salivary pH (litmus) paper Drinking straw Procedures: 1. Measure 2 ounces of water in a glass. Obtain the pH of the
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iii TABLE OF CONTENTS Title Page…………………………………………………………….i Acknowledgement………………………………………………….ii Table of Contents…………………………………………………..iii-iv Chapter I: The Problem A. Introduction…………………………………………..1-4 B. Statement of the Problem………………………….4-5 C. Importance of the Study……………………………5 D. Scope and Delimitation…………………………….5 E. Methodology…………………………………………..6 F. Definition of Terms…………………………………..6 Chapter II: Presentation‚ Analysis and Interpretation
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Calculating Tank Volume Saving time‚ increasing accuracy By Dan Jones‚ Ph.D.‚ P.E. C alculating fluid volume in a horizontal or vertical cylindrical or elliptical tank can be complicated‚ depending on fluid height and the shape of the heads (ends) of a horizontal tank or the bottom of a vertical tank. Exact equations now are available for several commonly encountered tank shapes. These equations can be used to make rapid and accurate fluid-volume calculations. All equations are rigorous‚
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are necessary for the determination and the characterization of the quality of dried products can be grouped into: - Thermal properties :state of product; glassy‚ crystalline‚ rubbery‚ - Structural properties :density‚ porosity‚ pore size‚ specific volume‚ - Textural properties :compression test‚ stress relaxation test‚ tensile test‚ - Optical properties :colour‚ appearance‚ - Sensory properties :aroma‚ taste‚ flavour‚ - Nutritional
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temperature)‚ and 70°C. This investigation tested the hypothesis: The rate of osmosis will increase as the temperature increases 2x2x2cm cubes of potato were weighed and then placed into 100mL of 10% NaCl solutions for 10 minutes. After 10 minutes the cubes were again weighed to determine the amount of mass that they lost/gained and thus get an indication of the rate of osmosis. The results collected showed that the rate of osmosis was highest in the 70°C solution and lowest in the 20°C solution
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