move away from the surface of the earth‚ such as on the mountains‚ in aeroplanes‚ in spaceships‚ etc. 9. Mass : The amount of matter contained in a body is called mass. It is a scalar quantity and is measured by a physical balance. It is always a constant quantity and its unit in SI system is kilogram. 10. Weight : The force with which a body is attracted towards the centre of the Earth is called weight. O I. VERY SHORT ANSWER QuESTIONS YA Assignments for summAtive Assessment (1 Mark)
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gravitational force between them to observe G‚ the constant of universal gravity that Cavendish investigated. Important Formulas: Procedure: PhET Simulations Play with the Sims Physics Gravity Force Lab 1. Take some time and familiarize yourself with the simulation. Notice how forces change as mass changes and as distance changes. 2. Fill out the chart below for various objects at various distances. 3. Solve for the universal gravitation constant‚ G and compare it to published values. Remember
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Science‚ 3Department of Food Science and Nutrition‚ College of Home Economics‚ University of the Philippines‚ Diliman‚ Quezon City 1101 Philippines ------------------------------------------------- Keywords: forward and reverse reactions‚ equilibrium constant‚ Le Chatelier’s Principle‚ reaction quotient Introduction In chemical kinetics‚ it is stated that a forward reaction’s rate is dependent on the given concentration of the reactants. In other words‚ the relationship of the rate of a reaction is
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the variables mentioned above‚ this experiment was divided into two parts. In Experiment A‚ the radius of the path (length of the string)‚ along with the mass was kept constant‚ and the relation between centripetal force and square of frequency was determined. In Experiment B‚ the Centripetal force and the mass were kept constant‚ and the relationship between square of frequency and the Radius was determined. For Experiment A‚ the results showed that the relationship between the centripetal force
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Chemistry 12 Unit 2 Notes - Equilibrium Chemistry 12 Tutorial 5 – The Equilibrium Constant (Keq) What is Keq ? The "K" in Keq stands for "Constant". The "eq" means that the reaction is at equilibrium. Very roughly‚ Keq tells you the ratio of Products/Reactants for a given reaction at equilibrium at a certain temperature. [Products] [Reactants] K eq = It’s not quite this simple when we deal with real substances. Let’s take an example. It has been found for the reaction: 2HI(g )
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algebraically rearranged to pOH = 0.5(pKb + pCb ) 4. K1 = 9.76‚ T1 = 102 K; K2 = 3.74 × 10−61 ‚ T2 = 116 K Explanation: For and endothermic reaction‚ K is directly related to T. For an exothermic reaction‚ K is inversely related to T. K is constant with temperature only for ∆Hrxn = 0 kJ. 002 6.0 points Which combination of ∆G and K is possible? 1. ∆G = −29.4 J‚ K = 1.01 correct 2. ∆G = −77.6 kJ‚ K = 0.981 3. ∆G = 47.3 J‚ K = 3.02 × 1013 4. ∆G = 54.7 kJ‚ K = 1.03 5. ∆G = −82.5 J‚ K =
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The Determination of Keq for FeSCN2+ Joy Muthami February 12 2014 Introduction: The purpose of this lab was to calculate the equilibrium constant for the reaction of iron (III) ions with thiocyanate ions. The materials were first acquired then with the groups in the class each team was given a test solution to create and acquire information from then all the information was put together in order to save time. Specifically the group created test solutions #8‚ #9‚ and #10. Once the solutions were
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What is the mysterious dark energy that’s causing the expansion of the universe to accelerate? Is it some form of Einstein’s famous cosmological constant‚ or is it an exotic repulsive force‚ dubbed "quintessence‚" that could make up as much as three-quarters of the cosmos? Scientists from Lawrence Berkeley National Laboratory (Berkeley Lab) and Dartmouth College believe there is a way to find out. | | | | The SuperNova/Acceleration Probe‚ SNAP‚ is a satellite designed to study dark energy
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NATURE OF THE EQUILIBRIUM STATE: Equilibrium is the state where the rate of the forward reaction is equal to the rate of the reverse reaction. At these conditions‚ concentrations of all reactants and products remain constant with time once equilibrium has been established at constant temperature. (In stoichiometry‚ we dealt with equations that went to completion; often equilibrium equations are going to fall short of this goal.) Reactions are reversible. This is indicated by double arrows. • dynamic--
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Introduction For this experiment‚ we are going to determine the effect of temperature on solubility‚ to be done in a chemical by dissolving a solute in a definite amount of solution which is saturated. Specifically‚ the goal of this experiment is to prepare a saturated solution of Na2C2O4 in water at different temperatures‚ determine the effect of temperature in solubility‚ and to apply Le Chatelier’s Principle. We can do all this by simply titrating a certain amount of standard KMnO4‚ and measuring
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