Title: Penny Lab Experiment By -Objectives To determine how soap affects the surface tension of water. -Hypothesis In this experiment the hypothesis was that soap was going to affect the surface tension by weakening the bonds and allowing less water on the penny. -Materials * Penny * Beaker x2 (One containing soapy water the other containing pure tap) * Paper towels * Lab review sheet * Pencil * Pipette -Procedure First we picked who would drop the water onto
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your hypothesis‚ outcomes‚ and analysis: Table 1: Maize Yield From Arable Soil Amount of Mineral Nitrogen Fertilization (kg per 100 acres) Yield of Maize (mg of dry mass per 100 acres per year) in Arable Soil 0 8 20 10.7 40 13 60 15.2 80 16.4 100 18.2 120 19.2 140 20.8 160 20.4 180 20.1 Table 2: Maize Yield from Non-arable Sandy Loam Soil Amount of Mineral Nitrogen Fertilization (kg per 100 acres) Yield of Maize (mg of dry mass per 100 acres per year) in Non-arable
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Task 5 5th and 6th graders will be introduced to the concept of surface area of a cube. When doing so I would first begin by connecting previous learning with the new concept. These previous concepts are the prerequisite skills necessary to complete this task. Students will need to know how to compute for surface area. Some experience with using the equation (L x W) to compute for surface area is also helpful when advancing to surface area of a cube. Secure understanding of multiplication facts with
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Effects of Soil Erosion by Farms on the Environment and Some Solutions Traci Kramer Harrisburg Area Community College Table of Contents Abstract……………………….. Pg 3 Introduction…………………. Pg 4 Causes………………………….. Pg 4-5 Land Affects…………………. Pg 5 Water Affects………………. Pg 5-6 Chemicals…………………….. Pg 6 Lancaster County…………. Pg 6 Prevention…………………… Pg 7 Damage Control…………… Pg 7 Conclusion……………………. Pg 7-8 References…………………… Pg 9 Abstract This paper will go in depth on soil erosion caused by
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of liquid into a 10 ml graduated cylinder until it was filled to the 10 ml mark. The level was measured at the meniscus‚ bottom of the curve‚ of the liquid and the amount of drops was recorded. Dividing the volume (10 ml) by the amount of drops yields the volume of a single drop. This procedure was completed three times with three separate liquids; water‚ water with detergent and rubbing alcohol. Data from the three trials is listed below. The accuracy of the procedure is dependent on consistent
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Organ systems are specialised so that they can maximise the amount of materials exchanged over their membranes. The ways that effectiveness of an exchange surface can be increased are: Large surface area: a larger surface area means that more diffusion can occur at once. Thin membrane: this speeds up the exchange because the diffusion path is shorter so the molecules have less distance to travel. Efficient blood supply: In animals the blood system is very efficient for transporting a variety
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Viscosity of Liquids After studying the present lecture‚ you will be able to Define viscosity and viscosity coefficient Outline the method to measure viscosity using Ostwald viscometer Determine the average molecular weight of a polymer Determine the surface concentration of 1-butanol in aqueous solution Measure the distribution coefficient of a solute betweenn two solvents 39.1 Introduction Viscosity‚ one of the transport properties‚ arises because of intermolecular attractive and relatively long-range
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the cell? Hypothesis: The larger the cell is‚ the more difficult it will be for the chemicals to reach the centre of the cell‚ and diffuse throughout it. This is because there will be a higher surface-area to volume ratio in the larger cells‚ making the centre of the cells further away from the surface. Therefore‚ when dipped in sodium hydroxide‚ the larger cells will not be dyed pink all the way through like the smaller cells after the ten minutes. Materials: 1x1x1 cm agar cube 2x2x2 cm agar
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Demonstration of the Rates of Reaction Between Sulphuric Acid (25mL ±0.5mL) and Magnesium (0.02g ±0.01g) Changing Due to Different Surface Areas By Chania Baldwin Introduction: When sulphuric acid and magnesium are added together‚ magnesium sulphate and hydrogen gas is created. To create such a reaction the atoms must collide with a sufficient amount of energy. Every reaction requires a different amount of energy to create the reaction‚ which is called the activation energy; when there is not enough
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Sammy Hassan Mrs. Droege Biology‚ 4B September 7‚ 2007 Surface Area to Volume Ratio S.Hassan‚ September 7. 2007 AISJ‚ Jeddah Saudi Arabia Surface area is known to be beneficial to keeping organisms alive it allows huge organs such as the intestines to fit in a small area by being coiled and packed together tightly. This experiment looked if the surface area to volume ratio affected the speed of a chemical reaction. For this experiment‚ a film container was filled one-half full with
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