Discuss your physics questions online at www.physics4spm.com 3 FORCES AND PRESSURE 3.1 UNDERSTANDING PRESSURE Pressure is force per unit area Pressure = Force Area P= F A 1. Define Pressure 2. State pressure’s formula 3. State relationship between pressure and area. 4. Describe applications involving High Pressure Increasing the pressure by reducing the area A sharp knife has a very The studs on a football small surface area on its boot have only a small cutting edge so that high area of contact
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buoyancy? – Buoyancy is the upward force caused by a fluid such as water. • What is Archimedes Principle? – The buoyant force is equal to the weight of the displaced water. • What is density? – Density is the mass of a material per unit volume. – Example: The density of steel is 10 times more than the density of wood. Hypothesis I think when the weight of the object is greater than the displaced water‚ it will sink. If the weight of the object is equal to the weight of the displaced water
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cylinder (g) Graduated cylinder Liquid (g) Liquid (g) Density g/ml % Error Water 5ml 18.85g 23.4g 4.55g 0.91g/ml Isopropyl alcohol 5ml 18.85g 23.0g 4.15g 0.83g/ml Object Mass (g) Length (cm) Width (cm) Height (cm) Volume (cm3) Density (g/ cm3) Magnet 4.35g 2.55cm .6cm .6cm .918 cm3 4.74g/cm3 Object Mass (g) Initial volume of Graduated cylinder (ml) Final volume of Graduated cylinder (ml) Object volume (ml) Density (g/ml) Magnet 4.35g 7ml 7.75ml .75ml 5.8 g/ml Metal
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013 4. 58.3 5. 0.583 C. DENSITY and SPECIFIC GRAVITY (20 pts.) (Observe proper Significant Figures in the answer) 1. Calculate the mass in grams of 15.0ml of a saline solution that has a density 1.05 g/ml 2. Copper has a density of 8.96 g/ml. Calculate the volume occupied by 125.0 g of copper. 3. A. If the density of a liquid is 0.80 g/ml‚ what is its specific gravity? B. If the specific gravity of a substance is 2.3‚ what is its density? D. TEMPERATURE (30 pts.) (Observe
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The Seven Layer Density Column By Nicia Buttner Grade 8 Table of Contents: Statement of purpose……………………………………. 2 Hypothesis…………………………………………………….. 3 Research……………………………………………………….. 4 Materials………………………………………………………. 5 Procedure……………………………………………………… 6 Observation and results…………………………………. 7 Conclusion…………………………………………………….. 8 Bibliography…………………………………………………... 9 Acknowledgements………………………………………… 10 Page 2 The purpose of this experiment is to compare the different
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vertical U tube of uniform cross section contains mercury in both of its arms. A glycerine (d = 1.3 g/cm3) column of length 10cm is introduced into one of the arms. Oil of density 0.8g/cm3 is poured in the other arm until the upper surfaces of the oil and glycerine are in the same horizontal level. Find the length of oil column. Density of mercury is 13.6 g/cm3. (9.6cm) 2. Two communicating cylindrical tubes contain mercury. The diameter of one vessel is four times larger than the
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Cylinder with liquid (g) Liquid (g) Density g/mL % Error Water 5.0 17.0 22.0 5.0 1.0 0.0 Isopropyl alcohol 5.1 17.0 21.6 4.6 0.90 14.5 Data Table 5: Magnet – Measurement Method. Object: Mass (g) Length (cm) Width (cm) Height (cm) Volume (cm3) Density (g/cm3) Magnet 4.6 2.5 0.5 0.5 0.625 7.36 Data Table 6: Displacement Method. Object Mass (g) Initial volume of graduated cylinder (mL) Final volume of graduated cylinder (mL) Object Volume (mL) Density (g/mL) Magnet
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Calculating the Density of Liquids II. Purpose/Background: The purpose if this lab was to determine the density of water and an unknown liquid. Density is defined as the mass of a substance divided by its volume. It is an intrinsive property of matter and is used to specifically characterize substances. III. Procedure: 1.We massed an empty 10mL graduated cylinder to the nearest .01g. 2.Then‚ we filled the graduated cylinder with 4.0-5.0 mL of distilled water‚ 3.massed it to the nearest 0.1
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your pipet for each trial. Use your mass of water and the volume of the volumetric pipet to calculate the density of water for each trial. Calculate the average density‚ standard deviation‚ and the 90% confidence limits for the average density. 9- Use the temperature of your water along with the values of mass and volume of water given in Table I to calculate the accepted values for the density of water. 10- Determine the relative error with respect to the
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calculate density. Procedure * Access the virtual lab and complete the experiments. Data * Below is the table that you will complete for the virtual lab. Either type your results into this table or print the table from the virtual lab (it must be submitted to receive full credit for this assignment.) * To print from the virtual lab. 1. Be sure the data table is viewable. 2. Right-click (PC) or Command-Click (Mac) on the table and select print. Part I: Density of Unknown
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