In this problem we assume that fish are caught at a constant rate h independent of the size of the fish population. Then y satisfies
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![b) K dya alla JK) Yah to -hy-rf_h kdy zknyahyokhar (kry d y = kh) dt andy = 0 (Ay-kaytica] dr + kdy = 0 Mat & Naga IM ON И АN](http://img.homeworklib.com/questions/e2e2ae90-329d-11ec-8e19-09d7da84f58b.png?x-oss-process=image/resize,w_560)
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In this problem we assume that fish are caught at a constant
rate h independent of...
2. (3+4+4+4 pts) In this problem, we discuss a method of solving SOL equations known as...
2. (3+4+4+4 pts) In this problem, we discuss a method of solving SOL equations known as Reduction of Order. Given an equation y" +p(a)y' +9(2)y = 0, and assuming yi is a solution, Reduction of Order asks: does there exist a second, linearly-independent solution y2 of the form y2 = u(x)41 for some function u(x)? See Section 3.2, Exercise 36 for reference). We'll now use this to solve the following problem. (a) Consider the SOL differential equation sin(x)y" — 2...
(1 point) In general for a non-homogeneous problem " ()y r)y-f(x) assume that yi, ye is...
(1 point) In general for a non-homogeneous problem " ()y r)y-f(x) assume that yi, ye is a fundamental set of solutions for the homogeneous problem y"+p(r)y' +(xy-0. Then the formula for the particular solution using the method of variation of parameters is are where W(z) is the Wronskian given by the determinant where ufe) and u ,-1-nent), d dz. NOTE When evaluating these indefinite integrals we take the arbitrary constant of integration to be zero. So we have- Wed and...
Problem 4 (Stiff ODE) We consider a chemical reaction system due to H. Robertson that has...
Problem 4 (Stiff ODE) We consider a chemical reaction system due to H. Robertson that has been extensively tested as a test problem for stiff solvers yí = -ayi + By2y3, y = ayı – By2y3 – xy2, y = vyž where a = 0.04, B = 1.E +4 and y = 3. E + 7 are slow, fast, and very fast reaction rates. The starting point is y(0) = (1,0,0). (a) It is known that this system reaches a...
Problem 3 (12 points): Let D be a bounded domain in R" with smooth boundary. Suppose that K(x, y) is a Green's function for the Neumann . For each x E D, the function y H K(x, y) is a smooth...
Problem 3 (12 points): Let D be a bounded domain in R" with smooth boundary. Suppose that K(x, y) is a Green's function for the Neumann . For each x E D, the function y H K(x, y) is a smooth harmonic For each x E D, the normal derivative of the function y K(x, y) . For each z e D, the function y K(x,y)-Г(z-y) is smooth near problem. This means the following: function on D(r satisfies (VyK(x, y).v(b))-arefor...
Instructor Questions #10 . Directions: Print this document (2 pages). Do your rough work on a scr...
Instructor Questions #10 . Directions: Print this document (2 pages). Do your rough work on a scraph, upload h te (unsubmitted) sheet. work on a separa Write your solutions directly on this page and the next page. crowamark.com IQ10 1. 110 points total Le ). t N(t) be the population of fish (measured in millions of fish) in a lake at time t (measured in years Suppose that the lake has carrying capacity K (in millions of fish), and that...
Problem 1: Consider a 2nd order homogeneous differential equation of the form aa2y"(x)bay(x) + cy =...
Problem 1: Consider a 2nd order homogeneous differential equation of the form aa2y"(x)bay(x) + cy = 0 (1) where a, b, c are constants satisfy so that y(x) = x (a) Find and justify what conditions should a constant m to (1) is a solution (b) Using your solution to (1) Write these three different cases as an equation that a, b,c satisfy. Hint: Use the quadratic formula we should get three different cases for the values that m can...
Problem 4: Evaluation of the convolution integral too y(t) = (f * h)(t) = f(t)h(t –...
Problem 4: Evaluation of the convolution integral too y(t) = (f * h)(t) = f(t)h(t – 7)dt is greatly simplified when either the input f(t) or impulse response h(t) is the sum of weighted impulse functions. This fact will be used later in the semester when we study the operation of communication systems using Fourier analysis methods. a) Use the convolution integral to prove that f(t) *8(t – T) = f(t – T) and 8(t – T) *h(t) = h(t...
TSD.1 In this problem, we will see (in outline) how we can calculate the multiplicity of a monatomic ideal gas This derivation involves concepts presented in chapter 17 Note that the task is to...
TSD.1 In this problem, we will see (in outline) how we can calculate the multiplicity of a monatomic ideal gas This derivation involves concepts presented in chapter 17 Note that the task is to count the number of microstates that are compatible with a given gas macrostate, which we describe by specifying the gas's total energy u (within a tiny range of width dlu), the gas's volume V and the num- ber of molecules N in the gas. We will...
b. For the above to be true, the constant term e must be related HOW to...
b. For the above to be true, the constant term e must be related HOW to the constants 0 and K ? (Write down an equation that includes all four constants.) (3 pts.) c. Show how v, the speed at which one pulse (or crest or trough, etc.) of the wave propagates, can be expressed in terms of your finding in (b). Show reasoning, not just a final answer (3 pts). w = angular frequency = number of cycles per...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
2. (3+4+4+4 pts) In this problem, we discuss a method of solving SOL equations known as Reduction of Order. Given an equation y" +p(a)y' +9(2)y = 0, and assuming yi is a solution, Reduction of Order asks: does there exist a second, linearly-independent solution y2 of the form y2 = u(x)41 for some function u(x)? See Section 3.2, Exercise 36 for reference). We'll now use this to solve the following problem. (a) Consider the SOL differential equation sin(x)y" — 2...
(1 point) In general for a non-homogeneous problem " ()y r)y-f(x) assume that yi, ye is a fundamental set of solutions for the homogeneous problem y"+p(r)y' +(xy-0. Then the formula for the particular solution using the method of variation of parameters is are where W(z) is the Wronskian given by the determinant where ufe) and u ,-1-nent), d dz. NOTE When evaluating these indefinite integrals we take the arbitrary constant of integration to be zero. So we have- Wed and...
Problem 4 (Stiff ODE) We consider a chemical reaction system due to H. Robertson that has been extensively tested as a test problem for stiff solvers yí = -ayi + By2y3, y = ayı – By2y3 – xy2, y = vyž where a = 0.04, B = 1.E +4 and y = 3. E + 7 are slow, fast, and very fast reaction rates. The starting point is y(0) = (1,0,0). (a) It is known that this system reaches a...
Problem 3 (12 points): Let D be a bounded domain in R" with smooth boundary. Suppose that K(x, y) is a Green's function for the Neumann . For each x E D, the function y H K(x, y) is a smooth harmonic For each x E D, the normal derivative of the function y K(x, y) . For each z e D, the function y K(x,y)-Г(z-y) is smooth near problem. This means the following: function on D(r satisfies (VyK(x, y).v(b))-arefor...
Instructor Questions #10 . Directions: Print this document (2 pages). Do your rough work on a scraph, upload h te (unsubmitted) sheet. work on a separa Write your solutions directly on this page and the next page. crowamark.com IQ10 1. 110 points total Le ). t N(t) be the population of fish (measured in millions of fish) in a lake at time t (measured in years Suppose that the lake has carrying capacity K (in millions of fish), and that...
Problem 1: Consider a 2nd order homogeneous differential equation of the form aa2y"(x)bay(x) + cy = 0 (1) where a, b, c are constants satisfy so that y(x) = x (a) Find and justify what conditions should a constant m to (1) is a solution (b) Using your solution to (1) Write these three different cases as an equation that a, b,c satisfy. Hint: Use the quadratic formula we should get three different cases for the values that m can...
Problem 4: Evaluation of the convolution integral too y(t) = (f * h)(t) = f(t)h(t – 7)dt is greatly simplified when either the input f(t) or impulse response h(t) is the sum of weighted impulse functions. This fact will be used later in the semester when we study the operation of communication systems using Fourier analysis methods. a) Use the convolution integral to prove that f(t) *8(t – T) = f(t – T) and 8(t – T) *h(t) = h(t...
TSD.1 In this problem, we will see (in outline) how we can calculate the multiplicity of a monatomic ideal gas This derivation involves concepts presented in chapter 17 Note that the task is to count the number of microstates that are compatible with a given gas macrostate, which we describe by specifying the gas's total energy u (within a tiny range of width dlu), the gas's volume V and the num- ber of molecules N in the gas. We will...
b. For the above to be true, the constant term e must be related HOW to the constants 0 and K ? (Write down an equation that includes all four constants.) (3 pts.) c. Show how v, the speed at which one pulse (or crest or trough, etc.) of the wave propagates, can be expressed in terms of your finding in (b). Show reasoning, not just a final answer (3 pts). w = angular frequency = number of cycles per...
Consider a cylindrical capacitor like that shown in Fig. 24.6. Let d = rb − ra be the spacing between the inner and outer conductors. (a) Let the radii of the two conductors be only slightly different, so that d << ra. Show that the result derived in Example 24.4 (Section 24.1) for the capacitance of a cylindrical capacitor then reduces to Eq. (24.2), the equation for the capacitance of a parallel-plate capacitor, with A being the surface area of...
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