Pre-Calculus—Prerequisite Knowledge &Skills III. Polynomials A. Exponents The expression bn is called a power or an exponential expression. This is read “b to the nth power” The b is the base‚ and the small raised symbol n is called the exponent. The exponent indicates the number of times the base occurs as a factor. Examples—Express each of the following using exponents. a. 5 x 5 x 5 x 5 x 5 x 5 x 5 = b. 8 x 8 x 8 x 8 x 8 x 8 x 8
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the above 2. (0.5 marks) What is the mass of 0.45 mol S? Choose the closest value. A. B. C. D. E. 9.7 g 0.45 g 14 g 0.049 g 15 g 3. (0.5 marks) Balance the following equation using the smallest whole number coefficients. C5H10O5 + O2 → H2O + CO2 What is the coefficient of O2 ? A. B. C. D. E. 2 3 5 6 none of the above 4. (0.5 marks) Sulfurous acid‚ H2SO3‚ is A. B. C. a strong electrolyte a weak electrolyte a nonelectrolyte CHEM 120 (Fall 2011) 5. Test #1 (Version 001) Page
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4a-20 2a^2-10a + 4a -20 Add the coefficients; combine like terms -10a -10a 10a-10a cancels; subtract negative 10 from 4 to get -6. -10a-4a= -6 2a^2-6a-20 Reorder the terms. -6a+2a2^2-20 The expression is now simplified. Simplifying Expressions 2w - 3 + 3(w-4) - 5(w – 6) The given expression. The distributive property removes the parentheses. 2w 3w-12 Multiply coefficients and variables: 3*w and 3*-4.
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expression. Indicate whether the term is a variable term or a constant term. For each variable term‚ identify the variable and the coefficient of the term. Step 2. Identify the second term of the algebraic expression. Indicate whether the term is a variable term or a constant term. For each variable term‚ identify the variable and the coefficient of the term. 6. Simplify the expression using the properties of exponents. (Note that the answer should
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through a heat transfer coefficient. Heat is generated in the slab at the rate of 1.0 kW/m3. The thermal conductivity of the slab is 0.2 W/m-K. (a) Solve for the temperature distribution in the slab‚ noting any assumptions you must make. Be careful to clearly identify the boundary conditions. (b) Evaluate T at the front and back faces of the slab. (c) Show that your solution gives the expected heat fluxes at the back and front faces. Q.2 Compute overall heat transfer coefficient U for the slab shown
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RAHMAN Faculty : Engineering & Science Unit Code : UEME3213 Course : Unit Title : Heat and Mass Transfer Year/ Semester : Year 3/ Semester 2 Lecturer : Session : Experiment 2: Gaseous Diffusion Coefficient Objective To determine gas diffusion coefficient of acetone Introduction The knowledge of physical and chemical properties of certain materials is important because very often process engineering deal with the transformation and distribution
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Introduction The main theory of the experiment is that an object needs an amount of heat for it to change a unit mass by 1 degree in temperature. The objectives of the experiment are to determine the specific heat of metal specimens using the method of mixture‚ to measure the equipment properly‚ to carefully measure the temperature of the equipment‚ to be patient while waiting for the output of the experiment and to be precise in computing for the specific heat of the specimen. Theory Blanza
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Coefficient of Linear Expansion Introduction With few exceptions materials expand somewhat when heated through a temperature range that does not produce a change in phase (i.e. melting‚ freezing‚ boiling etc.). The added heat increases the average amplitude of vibration of the atoms in the material‚ which increases the average separation between the atoms. Although this effect is small‚ it is very important in any application that involves using different materials in an environment where they
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think about 1000 radial stations are required for a converged calculation. 2) The first plot is of a rotor with linear twist showing the lift coefficient variation with rbar in hover. The second plot is the lift coefficient max along the radius which looks to be about 1.2. The maximum thrust of the rotor in hover in terms of thrust coefficient is 0.0183. Cpo = 2.5668e-004 Cpi = 0.0020 Cpt = 0.0022 Cpideal = 0.0017 Fig Mer = 0.7832 MATLAB CODE: First Code: This
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Coefficient of Kinetic Friction Objective: After completing this experiment‚ you should be able to measure the coefficient of sliding friction of an object that is located on an inclined plane. Apparatus: Inclined Plane Pulley attachment for plane Wooden blcok‚ with hook attached Meterstick Felt Set of masses String Protractor Procedure: 1. Place the board in the position shown in Figure 7-1. 2. The angle of the board should be small enough so that the wooden block will not slide
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