Wang et al. Advances in Difference Equations 2013‚ 2013:57 http://www.advancesindifferenceequations.com/content/2013/1/57 RESEARCH Open Access Global dynamics in a class of discrete-time epidemic models with disease courses Lei Wang‚ Qianqian Cui and Zhidong Teng* * Correspondence: zhidong@xju.edu.cn College of Mathematics and System Sciences‚ Xinjiang University‚ Urumqi‚ Xinjiang 830046‚ P.R. China Abstract In this paper‚ a class of discrete SIRS epidemic models with disease
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9.2 Space: Context 1 – The Earth has a gravitational field that exerts a force on objects both on it and around it. Define weight as the force on an object due to a gravitational field Mass (m): • The amount of matter in a body • Constant anywhere in the universe • Scalar quantity • Measured in Kilograms (Kg) Weight (W): • The force acting on an object due to a gravitational field • Attractive force • Vector quantity • Direction – following a line
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determining the Kp from gibbs functions‚ and the last one in equilibrium composition calculations. 16-3C (a) No‚ because Kp depends on temperature only. (b) In general‚ the total mixture pressure affects the mixture composition. The equilibrium constant for the reaction N 2 + O
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Downloaded from SAE International by University Of Wales Trinity Saint‚ Friday‚ January 17‚ 2014 09:29:36 AM SOCIETY OF AUTOMOTIVE ENGINEERS‚ INC. 400 Commonwealth Drive‚ Warrendale‚ Pa. 15096 A Computer Program for Calculating Properties of Equilibrium Combustion Products with Some Applications to I.C. Engines Cherian Olikara and Gary L. Borman University of Wisconsin Automotive Engineering Congress and Exposition Detroit‚ Michigan February 24-28‚ 1975 750468 Downloaded
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Projectile Motion PHYS111 Formal Report 2 University of Canterbury Campbell Moulder Abstract The force of gravity is said to be a constant of 9.81 ms-2 (3). This can be proved by measuring the projectile motion of a bouncy ball and plotting a ∆Vertical Velocity vs. Time graph‚ the gradient of which should equal the constant force (acceleration due to) of gravity. Our gradient value of 10.26±0.49 ms-2 is consistent with the actual value of 9.81 ms-2. Introduction A projectile is an
Free Force Classical mechanics Newton's laws of motion
particles. r : distance between the two particles. G : constant of universal gravitation. m1 m2 F F r m1 m2 F F r Figure 1 The two forces form an action-reaction pair and have the following characteristics‚ * are equal in magnitude‚ * are opposite in direction‚ * act on different bodies * are of the same type (gravitational force). G is a universal constant called the gravitational constant (or constant of universal gravitation)‚ which has been measured experimentally
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)2 + (y )5 − y = ex is third order‚ nonlinear. We observe that in general‚ a d.e. has many solutions‚ e.g. y = sin x + c‚ c an arbitrary constant‚ is a solution of y = cos x. Such solutions containing arbitrary constants are called general solution of a given d.e.. Any solution obtained from the general solution by giving specific values to the arbitrary constants is called a particular solution of that d.e. e.g. 2 y = sin x + 1 is a particular solution of y = cos x. Basically‚ differential equations
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Paper Reference(s) 6663/01 Edexcel GCE Core Mathematics C1 Bronze Level B1 Time: 1 hour 30 minutes Materials required for examination Items included with question papers Mathematical Formulae (Green) Nil Candidates may use any calculator allowed by the regulations of the Joint Council for Qualifications. Calculators must not have the facility for symbolic algebra manipulation‚ differentiation and integration‚ or have retrievable
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Equilibrium‚ esp. Section 15.3 Purpose: The Law of Mass Action will be examined via a series of samples using the same reaction‚ but different stating concentrations. The equilibrium constant‚ K‚ for each reaction will be calculated‚ demonstrating that K for a given reaction at a fixed temperature is a constant‚ independent of starting concentrations. Background: For a general reaction aA + bB ↔ cC + dD‚ the Law of Mass Action (formulated by Guldberg and Waage‚ 1864) in terms of concentration
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SPECTROPHOTOMETRIC DETERMINATION OF THE EQUILIBRIUM CONSTANT OF A REACTION M. L. SANGA CHEMICAL ENGINEERING‚ COLLEGE OF ENGINEERING UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY‚ PHILIPPINES DATE PERFORMED: JANUARY 15‚ 2014 INSTRUCTOR’S NAME: MOISES JEROME GARRERO ______________________________________________________________________________________________________________________________ ABSTRACT The experiment aimed to determine the equilibrium constant Keq of the formation of Fe(SCN)2+ from
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