swell. Materials: Styrofoam cups (2 per group) Styrofoam cups to weigh down egg (2) Balance Paper towels Vinegar (enough to cover egg) Distilled water Corn syrup Fresh eggs (2 per group) Procedure: Day 1: 1. Take 1 clear cup and label it “Egg 1 : water”. Label the other clear cup “Egg 2 : syrup” (you may receive a cup that is already labeled). Also‚ label the cups with the initials of each member of your group. Also‚ label your class block. 2. Using a balance‚ measure
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Lab One – Diffusion and Osmosis SECTION ONE: Methods Lab 1 – Diffusion and Osmosis can be broken down into four parts (A‚ B‚ C‚ and D). Lab 1A – Diffusion In this exercise‚ we tested diffusion through dialysis tubing. This was done through a demo with the teacher‚ rather than individually in groups. First‚ a piece of 2.5cm dialysis tubing was obtained. Then one end was folded and clipped securely so that a solution poured into the bag would not leak out. Next‚ the other side of the bag was
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It is undoubtedly true that money is integral part of our modern lives. Therefore‚ some believe that high salary is the most important thing in their job. Others are of the opinion that people should work at jobs which is in their favorite. Each of views has its own merits. There are plausible reasons why many people look for jobs offering high salary. First of all‚ the fact remains that life is easier for those who have a plenty of money as they can do everything what they want‚ and do not have
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I like the beautiful things in our life‚ from my point of view‚ photography should convey the beauty in a way and make the photograph have the power to sublimate our soul. Photography as a kind of art‚ shows the world and the inner mind of the photographers themselves. Before the camera‚ people use camera obscura as the device to record the image. The original camera obscura casts the scenery outside to a surface through a hole on the wall of a dark room. Actually camera obscura means dark room
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Marie Gorjon Mrs. B Anatomy & Physiology 168 March 14‚ 2014 Diffusion across a Selectively Permeable membrane Introduction: Diffusion is movement of molecules from one area of concentration to another. This process is vital for the life functions of cells. Cells have selectively permeable membranes that allow only certain solutions to pass through them. Osmosis is a special kind of diffusion that allows water to go through semi-permeable membranes of high water potential to a region of lower
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Lab #1: Chemical Diffusion Purpose To discover how the size of a cell affects the diffusion of chemicals throughout the cell. Hypothesis I predict that as the cell size increases the diffusion depth and the diffusion rate will decrease. Equipment • Eye protection • 250 mL beaker • Timing device • Scoopula • Ruler • Scalpel • Sodium hydroxide solution • 3 different sized cubes of phenolphthalein agar • Paper towels Purpose 1. Put on
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1. What is Costco why is it successful with upscale shoppes? (Shahad 2. what could other retailers- both discount and full services retailers - learn from Costco? ( 3. assess Costco’s strategy in terms of its product mix of 4‚000 sku’s and its key appeals? 4. what are the basic principles underlying Costco’s merchandising strategy? (Hessa) 5. Costco spends very little on promotion efforts. how is it able to attract shoppers without greater expenditures? 6. Describe the ideal location and store
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The Rate of Diffusion in Different Temperatures Purpose: To see if the temperature of a solution will change the rate blue diffuses in it. This will be tested by timing how long it takes dye to diffuse in warm water‚ cold water‚ and room temperature water. Hypothesis: I think that the dye will diffuse at a faster rate in the warm water than in the cold water. I believe that the room temperature water will have the dye diffuse faster than the cold water but slower than the warm water. Variable:
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One purpose of the experiment was to gain an understanding of diffusion and osmosis‚ specifically in context of a plant or animal cell reaction to an isotonic‚ hypotonic‚ or hypertonic solution. Another objective was to understand the nuances of simple diffusion‚ facilitated diffusion‚ and active transport and to explicate the characteristics affecting the rates of diffusion. The next objective was to be able to explicate the partition coefficient and its influence on hemolysis. The final objective
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The effect of size on the effectiveness of diffusion Aim: To use agar blocks infused with 0.1 Molar sodium hydroxide (NaOH) and phenolphthalein to investigate the relationship between shape and surface area: volume ratio on the effectiveness of diffusion. Hypothesis: That for a cube of agar‚ the time taken for complete colourisation due to diffusion of HCl is directly proportional to the cubes volume. Materials: |A block of agar (10cm x 5cm x 3cm) with 0.1M NaOH and |1x 250mL
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