# b. Use the parametrization from (a) to compute the area of S a as S a ds. Be sure to substitute for ds!

Μέγεθος: px
Εμφάνιση ξεκινά από τη σελίδα:

Download "b. Use the parametrization from (a) to compute the area of S a as S a ds. Be sure to substitute for ds!"

## Transcript

1 MTH U341 urface Integrals, tokes theorem, the divergence theorem To be turned in Wed., Dec Let be the sphere of radius a, x 2 + y 2 + z 2 a 2. a. Use spherical coordinates (with ρ a) to parametrize. r(φ, θ) <a sin φ cos θ, a sin φ sin θ, a cos φ>. b. Use the parametrization from (a) to compute the area of as d. Be sure to substitute for d! ecall that d r φ r θ. so r φ <a cos φ cos θ, a cos φ sin θ, a sin φ> r θ < a sin φ sin θ, a sin φ cos θ, >, i j k r φ r θ a cos φ cos θ a cos φ sin θ a sin φ a sin φ sin θ a sin φ cos θ a 2 sin 2 φ cos θi + a 2 sin 2 φ sin θj + a 2 cos φ sin φ k a 2 sin φ<sin φ cos θ, sin φ sin θ, cos φ>. r φ r θ a 2 sin φ<sin φ cos θ, sin φ sin θ, cos φ> a 2 sin φ <sin φ cos θ, sin φ sin θ, cos φ> a 2 sin φ sin 2 φ cos 2 θ + sin 2 φ sin 2 θ + cos 2 φ a 2 sin φ sin 2 φ(cos 2 θ + sin 2 θ) + cos 2 φ a 2 sin φ sin 2 φ + cos 2 φ a 2 sin φ. We can now compute the integral: d 2π π 2π 2π 2π a 2 sin φ dφ dθ a 2 cos φ π, dθ a 2 (cos(π) cos()), dθ 2a 2 dθ 4πa Let be the surface z x 2 + 3y 2, x 2, y 3. a. Parametrize using the standard parametrization of a graph. r(x, y) <x, y, x 2 + 3y 2 > 1

2 that is, x x, y y, z x 2 + 3y 2. b. Let r(x, y) be the parametrization from (a). Compute the unit normal explicitly. What is n(, )? n(x, y) 1 r x r y r x r y r x <1,, 2x>, r y <, 1, 6y> and i j k r x r y 1 2x 1 6y < 2x, 6y, 1>. and < 2x, 6y, 1> 4x y n(x, y) 1 < 2x, 6y, 1> 4x2 + 36y n(, ) <,, 1>. c. Let F be the vector field F (x, y, z) yi + x 2 j + (4z + y 2 x 2 ) k. Compute F d, where is oriented using the unit normal from (b). F d where is the rectangle x 2, y 3. Also F (r(x, y)) r x r y da F (r(x, y)) <y, x 2, 4(x 2 + 3y 2 ) + y 2 x 2 > <y, x 2, 3x y 2 >, so from (2b) we get F (r(x, y)) r x r y da 2 2 <y, x 2, 3x y 2 > < 2x, 6y, 1> dx dy 2xy 6x 2 y + 3x y 2 dx dy [ x 2 y 2x 3 y + x y 2 x 2 dy 26y 2 2y + 8 dy (26/3)y 3 1y 2 + 8y d. Let C be the boundary of, with orientation induced from the orientation n of given in (b). Check tokes theorem by computing C F dr and curl F d nd seeing that you get the same number for both. Hint: You can parametrize C by using the parametrization of in (a). If is the plane region corresponding to by this parametrization, then C is parametrized by the boundary of.

3 First compute the flux integral. curl F i j k / x / y / z y x 2 4z + y 2 x 2 ( (4z + y 2 x 2 )/ y (x 2 )/ z)i ( (4z + y 2 x 2 )/ x (y)/ z)j + ( (x 2 )/ x (y)/ y) k <2y, 2x, 2x 1>. Let be the rectangle x 2, y 3. From (2b) we get curlf d curlf (r(x, y)) r x r y da <2y, 2x, 2x 1> < 2x, 6y, 1> da 2 4xy 12xy + 2x 1 dx dy 8x 2 y + x 2 x x2 x dy 32y + 2 dy 16y 2 + 2y Now, we compute the line integral. ince is parametrized by the rectangle using the function r(x, y), the boundary is parametrized by, using the restriction of r(x, y) to the edges of. This gives 4 separate pieces to s we go counter-clockwise around, starting at (, ): C 1, parametrized by r 1 (x) r(x, ) < x,, x 2 >, x goes from to 2 C 2, parametrized by r 2 (y) r(2, y) < 2, y, 4 + 3y 2 >, y goes from to 3 C 3, parametrized by r 3 (x) r(x, 3) <x, 3, x >, x goes from 2 to C 4, parametrized by r 4 (y) r(, y) <, y, 3y 2 >, y goes from 3 to We do the integrals one at a time and add the results: 2 F dr F (r 1 (x)) r 1(x) dx C <, x 2, 3x 2 > <1,, 2x> dx 6x 3 dx (6/4)x

4 F dr C 2 F (r 2 (y)) r 2(y) dy <y, 4, y 2 > <, 1, 6y> dy y + 78y 3 dy 4y + 36y 2 + (39/2)y C 3 F dr F (r 3 (x)) r 3(x) dx <3, x 2, 3x > <1,, 2x> dx 3 + 6x x dx 3x + (6/4)x x F dr C F (r 4 (y)) r 4(y) dy <y,, 13y 2 > <, 1, 6y> dy 78y 3 dy (39/2)y F dr Let F be the vector field F (x) x x 3. a. Compute div F. Explicitly, x <x, y, z>, x (x 2 + y 2 + z 2 ) 1/2., and x F (x) < (x 2 + y 2 + z 2 ), y 3/2 (x 2 + y 2 + z 2 ), z 3/2 (x 2 + y 2 + z 2 ) divf [ x x (x 2 + y 2 + z 2 ) 3/2 + [ y + [ y (x 2 + y 2 + z 2 ) 3/2 z 3/2 >, z (x 2 + y 2 + z 2 ) 3/2.

5 We calculate the partial derivatives using the quotient rule: [ x x (x 2 + y 2 + z 2 ) 3/2 (x2 + y 2 + z 2 ) 3/2 1 (3/2)(x 2 + y 2 + z 2 ) 1/2 2x x (x 2 + y 2 + z 2 ) 3 (x2 + y 2 + z 2 ) 3/2 3(x 2 + y 2 + z 2 ) 1/2 x 2 (x 2 + y 2 + z 2 ) 3 (x2 + y 2 + z 2 ) 1/2 ((x 2 + y 2 + z 2 ) 3x 2 ) (x 2 + y 2 + z 2 ) 3 2x2 + y 2 + z 2 (x 2 + y 2 + z 2 ) 5/2. witching x with y and x with z gives [ y y (x 2 + y 2 + z 2 ) [ 3/2 z z (x 2 + y 2 + z 2 ) 3/2 x2 2y 2 + z 2 (x 2 + y 2 + z 2 ) 5/2 x2 + y 2 2z 2 (x 2 + y 2 + z 2 ) 5/2 and thus div F x2 2y 2 + z 2 (x 2 + y 2 + z 2 ) 5/2 + x2 2y 2 + z 2 (x 2 + y 2 + z 2 ) 5/2 + x2 + y 2 2z 2 (x 2 + y 2 + z 2 ) 5/2 x2 2y 2 + z 2 + x 2 2y 2 + z 2 + x 2 + y 2 2z 2 (x 2 + y 2 + z 2 ) 5/2. b. Compute F d, where a is as in (1) the sphere of radius a, center (,, ), and with orientation the outward normal vector. ince the radial vector x is perpendicular to the sphere, we have n x x

6 ince x a for x in, we have F d F nd a x x x 3 x d x x x d 4 x a 2 x d 4 x a 2 x d 4 1 a d 2 1 a 2 d 1 a 2 4πa2 (from (1b)) 4π. c. (You might want to wait until after class on Monday for this one, but try it before if you are a thrill-seeker) Let be the ellipsoid 5x y z 2 123, oriented with the outward normal. Use the divergence theorem and (b) to compute F d. Hint: Take a small enough so that is inside of nd let D be the solid region between nd. Use the divergence theorem: The boundary of D is D where means the sphere of radius a with the inward pointing normal. We have F d F d F d a F d D div F dv (the divergence theorem) D (since div F ). F d F d 4π. 4.(You might want to wait until after class on Monday for this one, but try it before if you are a thrill-seeker) Let 1 be the paraboloid z 1 x 2 y 2, z, oriented with the upward normal. Let 2 be the paraboloid z 2 2x 2 2y 2, z, also oriented with the upward normal. a. Let F be a vector field on 3. Use tokes theorem to show that curlf d curlf d. 1 2

7 Hint: Note that 2 and 1 both have the same boundary curve, x 2 + y 2 1, z. Let C be the common boundary curve of 1 and 2. By Two applications of tokes theorem curlf d F dr curlf d. 1 C 2 b. Let F be a vector field on 3. Use the divergence theorem to show that curlf d curlf d. 1 2 Hint: div(curl F ). Note that 2 lies above 1, meeting along their boundary curve, and consider the solid region D between 1 and 2. Let 1 be the surface 1 oriented with the downward pointing normal. ince 2 is the top part of D and 1 is the bottom, we have D 2 1, because the normal vector on D pointing away from D is the upward normal on 2, but the downward one on 1. Following the hint, we use the divergence theorem, using also that div(curlf ) : curlf d curlf d curlf d 2 1 D div (curlf ) dv and thus curlf d 1 curlf d. 2 D

### 1. (a) (5 points) Find the unit tangent and unit normal vectors T and N to the curve. r(t) = 3cost, 4t, 3sint

1. a) 5 points) Find the unit tangent and unit normal vectors T and N to the curve at the point P, π, rt) cost, t, sint ). b) 5 points) Find curvature of the curve at the point P. Solution: a) r t) sint,,

Διαβάστε περισσότερα

### Parametrized Surfaces

Parametrized Surfaces Recall from our unit on vector-valued functions at the beginning of the semester that an R 3 -valued function c(t) in one parameter is a mapping of the form c : I R 3 where I is some

Διαβάστε περισσότερα

### Answer sheet: Third Midterm for Math 2339

Answer sheet: Third Midterm for Math 339 November 3, Problem. Calculate the iterated integrals (Simplify as much as possible) (a) e sin(x) dydx y e sin(x) dydx y sin(x) ln y ( cos(x)) ye y dx sin(x)(lne

Διαβάστε περισσότερα

### Integrals in cylindrical, spherical coordinates (Sect. 15.7)

Integrals in clindrical, spherical coordinates (Sect. 5.7 Integration in spherical coordinates. Review: Clindrical coordinates. Spherical coordinates in space. Triple integral in spherical coordinates.

Διαβάστε περισσότερα

### Spherical Coordinates

Spherical Coordinates MATH 311, Calculus III J. Robert Buchanan Department of Mathematics Fall 2011 Spherical Coordinates Another means of locating points in three-dimensional space is known as the spherical

Διαβάστε περισσότερα

### Homework 8 Model Solution Section

MATH 004 Homework Solution Homework 8 Model Solution Section 14.5 14.6. 14.5. Use the Chain Rule to find dz where z cosx + 4y), x 5t 4, y 1 t. dz dx + dy y sinx + 4y)0t + 4) sinx + 4y) 1t ) 0t + 4t ) sinx

Διαβάστε περισσότερα

### Areas and Lengths in Polar Coordinates

Kiryl Tsishchanka Areas and Lengths in Polar Coordinates In this section we develop the formula for the area of a region whose boundary is given by a polar equation. We need to use the formula for the

Διαβάστε περισσότερα

### Areas and Lengths in Polar Coordinates

Kiryl Tsishchanka Areas and Lengths in Polar Coordinates In this section we develop the formula for the area of a region whose boundary is given by a polar equation. We need to use the formula for the

Διαβάστε περισσότερα

### 9.09. # 1. Area inside the oval limaçon r = cos θ. To graph, start with θ = 0 so r = 6. Compute dr

9.9 #. Area inside the oval limaçon r = + cos. To graph, start with = so r =. Compute d = sin. Interesting points are where d vanishes, or at =,,, etc. For these values of we compute r:,,, and the values

Διαβάστε περισσότερα

### 3.4 SUM AND DIFFERENCE FORMULAS. NOTE: cos(α+β) cos α + cos β cos(α-β) cos α -cos β

3.4 SUM AND DIFFERENCE FORMULAS Page Theorem cos(αβ cos α cos β -sin α cos(α-β cos α cos β sin α NOTE: cos(αβ cos α cos β cos(α-β cos α -cos β Proof of cos(α-β cos α cos β sin α Let s use a unit circle

Διαβάστε περισσότερα

### Solutions to Exercise Sheet 5

Solutions to Eercise Sheet 5 jacques@ucsd.edu. Let X and Y be random variables with joint pdf f(, y) = 3y( + y) where and y. Determine each of the following probabilities. Solutions. a. P (X ). b. P (X

Διαβάστε περισσότερα

### Appendix A. Curvilinear coordinates. A.1 Lamé coefficients. Consider set of equations. ξ i = ξ i (x 1,x 2,x 3 ), i = 1,2,3

Appendix A Curvilinear coordinates A. Lamé coefficients Consider set of equations ξ i = ξ i x,x 2,x 3, i =,2,3 where ξ,ξ 2,ξ 3 independent, single-valued and continuous x,x 2,x 3 : coordinates of point

Διαβάστε περισσότερα

### Section 7.6 Double and Half Angle Formulas

09 Section 7. Double and Half Angle Fmulas To derive the double-angles fmulas, we will use the sum of two angles fmulas that we developed in the last section. We will let α θ and β θ: cos(θ) cos(θ + θ)

Διαβάστε περισσότερα

### derivation of the Laplacian from rectangular to spherical coordinates

derivation of the Laplacian from rectangular to spherical coordinates swapnizzle 03-03- :5:43 We begin by recognizing the familiar conversion from rectangular to spherical coordinates (note that φ is used

Διαβάστε περισσότερα

### Example Sheet 3 Solutions

Example Sheet 3 Solutions. i Regular Sturm-Liouville. ii Singular Sturm-Liouville mixed boundary conditions. iii Not Sturm-Liouville ODE is not in Sturm-Liouville form. iv Regular Sturm-Liouville note

Διαβάστε περισσότερα

### Section 8.3 Trigonometric Equations

99 Section 8. Trigonometric Equations Objective 1: Solve Equations Involving One Trigonometric Function. In this section and the next, we will exple how to solving equations involving trigonometric functions.

Διαβάστε περισσότερα

### Section 9.2 Polar Equations and Graphs

180 Section 9. Polar Equations and Graphs In this section, we will be graphing polar equations on a polar grid. In the first few examples, we will write the polar equation in rectangular form to help identify

Διαβάστε περισσότερα

### Problem 3.1 Vector A starts at point (1, 1, 3) and ends at point (2, 1,0). Find a unit vector in the direction of A. Solution: A = 1+9 = 3.

Problem 3.1 Vector A starts at point (1, 1, 3) and ends at point (, 1,0). Find a unit vector in the direction of A. Solution: A = ˆx( 1)+ŷ( 1 ( 1))+ẑ(0 ( 3)) = ˆx+ẑ3, A = 1+9 = 3.16, â = A A = ˆx+ẑ3 3.16

Διαβάστε περισσότερα

### Double Integrals, Iterated Integrals, Cross-sections

Chapter 14 Multiple Integrals 1 Double Integrals, Iterated Integrals, Cross-sections 2 Double Integrals over more general regions, Definition, Evaluation of Double Integrals, Properties of Double Integrals

Διαβάστε περισσότερα

### Fourier Series. MATH 211, Calculus II. J. Robert Buchanan. Spring Department of Mathematics

Fourier Series MATH 211, Calculus II J. Robert Buchanan Department of Mathematics Spring 2018 Introduction Not all functions can be represented by Taylor series. f (k) (c) A Taylor series f (x) = (x c)

Διαβάστε περισσότερα

### Math221: HW# 1 solutions

Math: HW# solutions Andy Royston October, 5 7.5.7, 3 rd Ed. We have a n = b n = a = fxdx = xdx =, x cos nxdx = x sin nx n sin nxdx n = cos nx n = n n, x sin nxdx = x cos nx n + cos nxdx n cos n = + sin

Διαβάστε περισσότερα

### CHAPTER 25 SOLVING EQUATIONS BY ITERATIVE METHODS

CHAPTER 5 SOLVING EQUATIONS BY ITERATIVE METHODS EXERCISE 104 Page 8 1. Find the positive root of the equation x + 3x 5 = 0, correct to 3 significant figures, using the method of bisection. Let f(x) =

Διαβάστε περισσότερα

### Numerical Analysis FMN011

Numerical Analysis FMN011 Carmen Arévalo Lund University carmen@maths.lth.se Lecture 12 Periodic data A function g has period P if g(x + P ) = g(x) Model: Trigonometric polynomial of order M T M (x) =

Διαβάστε περισσότερα

### Practice Exam 2. Conceptual Questions. 1. State a Basic identity and then verify it. (a) Identity: Solution: One identity is csc(θ) = 1

Conceptual Questions. State a Basic identity and then verify it. a) Identity: Solution: One identity is cscθ) = sinθ) Practice Exam b) Verification: Solution: Given the point of intersection x, y) of the

Διαβάστε περισσότερα

### ECE Spring Prof. David R. Jackson ECE Dept. Notes 2

ECE 634 Spring 6 Prof. David R. Jackson ECE Dept. Notes Fields in a Source-Free Region Example: Radiation from an aperture y PEC E t x Aperture Assume the following choice of vector potentials: A F = =

Διαβάστε περισσότερα

### Matrices and Determinants

Matrices and Determinants SUBJECTIVE PROBLEMS: Q 1. For what value of k do the following system of equations possess a non-trivial (i.e., not all zero) solution over the set of rationals Q? x + ky + 3z

Διαβάστε περισσότερα

### Second Order Partial Differential Equations

Chapter 7 Second Order Partial Differential Equations 7.1 Introduction A second order linear PDE in two independent variables (x, y Ω can be written as A(x, y u x + B(x, y u xy + C(x, y u u u + D(x, y

Διαβάστε περισσότερα

### 2 Composition. Invertible Mappings

Arkansas Tech University MATH 4033: Elementary Modern Algebra Dr. Marcel B. Finan Composition. Invertible Mappings In this section we discuss two procedures for creating new mappings from old ones, namely,

Διαβάστε περισσότερα

### Exercise 1.1. Verify that if we apply GS to the coordinate basis Gauss form ds 2 = E(u, v)du 2 + 2F (u, v)dudv + G(u, v)dv 2

Math 209 Riemannian Geometry Jeongmin Shon Problem. Let M 2 R 3 be embedded surface. Then the induced metric on M 2 is obtained by taking the standard inner product on R 3 and restricting it to the tangent

Διαβάστε περισσότερα

### Similarly, we may define hyperbolic functions cosh α and sinh α from the unit hyperbola

Universit of Hperbolic Functions The trigonometric functions cos α an cos α are efine using the unit circle + b measuring the istance α in the counter-clockwise irection along the circumference of the

Διαβάστε περισσότερα

### Problem Set 9 Solutions. θ + 1. θ 2 + cotθ ( ) sinθ e iφ is an eigenfunction of the ˆ L 2 operator. / θ 2. φ 2. sin 2 θ φ 2. ( ) = e iφ. = e iφ cosθ.

Chemistry 362 Dr Jean M Standard Problem Set 9 Solutions The ˆ L 2 operator is defined as Verify that the angular wavefunction Y θ,φ) Also verify that the eigenvalue is given by 2! 2 & L ˆ 2! 2 2 θ 2 +

Διαβάστε περισσότερα

### Απόκριση σε Μοναδιαία Ωστική Δύναμη (Unit Impulse) Απόκριση σε Δυνάμεις Αυθαίρετα Μεταβαλλόμενες με το Χρόνο. Απόστολος Σ.

Απόκριση σε Δυνάμεις Αυθαίρετα Μεταβαλλόμενες με το Χρόνο The time integral of a force is referred to as impulse, is determined by and is obtained from: Newton s 2 nd Law of motion states that the action

Διαβάστε περισσότερα

### Problem 3.16 Given B = ˆx(z 3y) +ŷ(2x 3z) ẑ(x+y), find a unit vector parallel. Solution: At P = (1,0, 1), ˆb = B

Problem 3.6 Given B = ˆxz 3y) +ŷx 3z) ẑx+y), find a unit vector parallel to B at point P =,0, ). Solution: At P =,0, ), B = ˆx )+ŷ+3) ẑ) = ˆx+ŷ5 ẑ, ˆb = B B = ˆx+ŷ5 ẑ = ˆx+ŷ5 ẑ. +5+ 7 Problem 3.4 Convert

Διαβάστε περισσότερα

### Equations. BSU Math 275 sec 002,003 Fall 2018 (Ultman) Final Exam Notes 1. du dv. FTLI : f (B) f (A) = f dr. F dr = Green s Theorem : y da

BSU Math 275 sec 002,003 Fall 2018 (Ultman) Final Exam Notes 1 Equations r(t) = x(t) î + y(t) ĵ + z(t) k r = r (t) t s = r = r (t) t r(u, v) = x(u, v) î + y(u, v) ĵ + z(u, v) k S = ( ( ) r r u r v = u

Διαβάστε περισσότερα

### Pg The perimeter is P = 3x The area of a triangle is. where b is the base, h is the height. In our case b = x, then the area is

Pg. 9. The perimeter is P = The area of a triangle is A = bh where b is the base, h is the height 0 h= btan 60 = b = b In our case b =, then the area is A = = 0. By Pythagorean theorem a + a = d a a =

Διαβάστε περισσότερα

### Uniform Convergence of Fourier Series Michael Taylor

Uniform Convergence of Fourier Series Michael Taylor Given f L 1 T 1 ), we consider the partial sums of the Fourier series of f: N 1) S N fθ) = ˆfk)e ikθ. k= N A calculation gives the Dirichlet formula

Διαβάστε περισσότερα

### AREAS AND LENGTHS IN POLAR COORDINATES. 25. Find the area inside the larger loop and outside the smaller loop

SECTIN 9. AREAS AND LENGTHS IN PLAR CRDINATES 9. AREAS AND LENGTHS IN PLAR CRDINATES A Click here for answers. S Click here for solutions. 8 Find the area of the region that is bounded by the given curve

Διαβάστε περισσότερα

### Variational Wavefunction for the Helium Atom

Technische Universität Graz Institut für Festkörperphysik Student project Variational Wavefunction for the Helium Atom Molecular and Solid State Physics 53. submitted on: 3. November 9 by: Markus Krammer

Διαβάστε περισσότερα

### Mock Exam 7. 1 Hong Kong Educational Publishing Company. Section A 1. Reference: HKDSE Math M Q2 (a) (1 + kx) n 1M + 1A = (1) =

Mock Eam 7 Mock Eam 7 Section A. Reference: HKDSE Math M 0 Q (a) ( + k) n nn ( )( k) + nk ( ) + + nn ( ) k + nk + + + A nk... () nn ( ) k... () From (), k...() n Substituting () into (), nn ( ) n 76n 76n

Διαβάστε περισσότερα

### Homework 3 Solutions

Homework 3 Solutions Igor Yanovsky (Math 151A TA) Problem 1: Compute the absolute error and relative error in approximations of p by p. (Use calculator!) a) p π, p 22/7; b) p π, p 3.141. Solution: For

Διαβάστε περισσότερα

### Solution to Review Problems for Midterm III

Solution to Review Problems for Mierm III Mierm III: Friday, November 19 in class Topics:.8-.11, 4.1,4. 1. Find the derivative of the following functions and simplify your answers. (a) x(ln(4x)) +ln(5

Διαβάστε περισσότερα

### Reminders: linear functions

Reminders: linear functions Let U and V be vector spaces over the same field F. Definition A function f : U V is linear if for every u 1, u 2 U, f (u 1 + u 2 ) = f (u 1 ) + f (u 2 ), and for every u U

Διαβάστε περισσότερα

### Tutorial Note - Week 09 - Solution

Tutoial Note - Week 9 - Solution ouble Integals in Pola Coodinates. a Since + and + 5 ae cicles centeed at oigin with adius and 5, then {,θ 5, θ π } Figue. f, f cos θ, sin θ cos θ sin θ sin θ da 5 69 5

Διαβάστε περισσότερα

### Jesse Maassen and Mark Lundstrom Purdue University November 25, 2013

Notes on Average Scattering imes and Hall Factors Jesse Maassen and Mar Lundstrom Purdue University November 5, 13 I. Introduction 1 II. Solution of the BE 1 III. Exercises: Woring out average scattering

Διαβάστε περισσότερα

### HOMEWORK 4 = G. In order to plot the stress versus the stretch we define a normalized stretch:

HOMEWORK 4 Problem a For the fast loading case, we want to derive the relationship between P zz and λ z. We know that the nominal stress is expressed as: P zz = ψ λ z where λ z = λ λ z. Therefore, applying

Διαβάστε περισσότερα

### Exercises 10. Find a fundamental matrix of the given system of equations. Also find the fundamental matrix Φ(t) satisfying Φ(0) = I. 1.

Exercises 0 More exercises are available in Elementary Differential Equations. If you have a problem to solve any of them, feel free to come to office hour. Problem Find a fundamental matrix of the given

Διαβάστε περισσότερα

### EE512: Error Control Coding

EE512: Error Control Coding Solution for Assignment on Finite Fields February 16, 2007 1. (a) Addition and Multiplication tables for GF (5) and GF (7) are shown in Tables 1 and 2. + 0 1 2 3 4 0 0 1 2 3

Διαβάστε περισσότερα

### ANSWERSHEET (TOPIC = DIFFERENTIAL CALCULUS) COLLECTION #2. h 0 h h 0 h h 0 ( ) g k = g 0 + g 1 + g g 2009 =?

Teko Classes IITJEE/AIEEE Maths by SUHAAG SIR, Bhopal, Ph (0755) 3 00 000 www.tekoclasses.com ANSWERSHEET (TOPIC DIFFERENTIAL CALCULUS) COLLECTION # Question Type A.Single Correct Type Q. (A) Sol least

Διαβάστε περισσότερα

### C.S. 430 Assignment 6, Sample Solutions

C.S. 430 Assignment 6, Sample Solutions Paul Liu November 15, 2007 Note that these are sample solutions only; in many cases there were many acceptable answers. 1 Reynolds Problem 10.1 1.1 Normal-order

Διαβάστε περισσότερα

### ( ) 2 and compare to M.

Problems and Solutions for Section 4.2 4.9 through 4.33) 4.9 Calculate the square root of the matrix 3!0 M!0 8 Hint: Let M / 2 a!b ; calculate M / 2!b c ) 2 and compare to M. Solution: Given: 3!0 M!0 8

Διαβάστε περισσότερα

### CYLINDRICAL & SPHERICAL COORDINATES

CYLINDRICAL & SPHERICAL COORDINATES Here we eamine two of the more popular alternative -dimensional coordinate sstems to the rectangular coordinate sstem. First recall the basis of the Rectangular Coordinate

Διαβάστε περισσότερα

### Solution Series 9. i=1 x i and i=1 x i.

Lecturer: Prof. Dr. Mete SONER Coordinator: Yilin WANG Solution Series 9 Q1. Let α, β >, the p.d.f. of a beta distribution with parameters α and β is { Γ(α+β) Γ(α)Γ(β) f(x α, β) xα 1 (1 x) β 1 for < x

Διαβάστε περισσότερα

### Statistical Inference I Locally most powerful tests

Statistical Inference I Locally most powerful tests Shirsendu Mukherjee Department of Statistics, Asutosh College, Kolkata, India. shirsendu st@yahoo.co.in So far we have treated the testing of one-sided

Διαβάστε περισσότερα

### Srednicki Chapter 55

Srednicki Chapter 55 QFT Problems & Solutions A. George August 3, 03 Srednicki 55.. Use equations 55.3-55.0 and A i, A j ] = Π i, Π j ] = 0 (at equal times) to verify equations 55.-55.3. This is our third

Διαβάστε περισσότερα

### 1 String with massive end-points

1 String with massive end-points Πρόβλημα 5.11:Θεωρείστε μια χορδή μήκους, τάσης T, με δύο σημειακά σωματίδια στα άκρα της, το ένα μάζας m, και το άλλο μάζας m. α) Μελετώντας την κίνηση των άκρων βρείτε

Διαβάστε περισσότερα

### Approximation of distance between locations on earth given by latitude and longitude

Approximation of distance between locations on earth given by latitude and longitude Jan Behrens 2012-12-31 In this paper we shall provide a method to approximate distances between two points on earth

Διαβάστε περισσότερα

### Inverse trigonometric functions & General Solution of Trigonometric Equations. ------------------ ----------------------------- -----------------

Inverse trigonometric functions & General Solution of Trigonometric Equations. 1. Sin ( ) = a) b) c) d) Ans b. Solution : Method 1. Ans a: 17 > 1 a) is rejected. w.k.t Sin ( sin ) = d is rejected. If sin

Διαβάστε περισσότερα

### Section 8.2 Graphs of Polar Equations

Section 8. Graphs of Polar Equations Graphing Polar Equations The graph of a polar equation r = f(θ), or more generally F(r,θ) = 0, consists of all points P that have at least one polar representation

Διαβάστε περισσότερα

### Finite Field Problems: Solutions

Finite Field Problems: Solutions 1. Let f = x 2 +1 Z 11 [x] and let F = Z 11 [x]/(f), a field. Let Solution: F =11 2 = 121, so F = 121 1 = 120. The possible orders are the divisors of 120. Solution: The

Διαβάστε περισσότερα

### CHAPTER 101 FOURIER SERIES FOR PERIODIC FUNCTIONS OF PERIOD

CHAPTER FOURIER SERIES FOR PERIODIC FUNCTIONS OF PERIOD EXERCISE 36 Page 66. Determine the Fourier series for the periodic function: f(x), when x +, when x which is periodic outside this rge of period.

Διαβάστε περισσότερα

### Fractional Colorings and Zykov Products of graphs

Fractional Colorings and Zykov Products of graphs Who? Nichole Schimanski When? July 27, 2011 Graphs A graph, G, consists of a vertex set, V (G), and an edge set, E(G). V (G) is any finite set E(G) is

Διαβάστε περισσότερα

### Example 1: THE ELECTRIC DIPOLE

Example 1: THE ELECTRIC DIPOLE 1 The Electic Dipole: z + P + θ d _ Φ = Q 4πε + Q = Q 4πε 4πε 1 + 1 2 The Electic Dipole: d + _ z + Law of Cosines: θ A B α C A 2 = B 2 + C 2 2ABcosα P ± = 2 ( + d ) 2 2

Διαβάστε περισσότερα

### ΚΥΠΡΙΑΚΟΣ ΣΥΝΔΕΣΜΟΣ ΠΛΗΡΟΦΟΡΙΚΗΣ CYPRUS COMPUTER SOCIETY 21 ος ΠΑΓΚΥΠΡΙΟΣ ΜΑΘΗΤΙΚΟΣ ΔΙΑΓΩΝΙΣΜΟΣ ΠΛΗΡΟΦΟΡΙΚΗΣ Δεύτερος Γύρος - 30 Μαρτίου 2011

Διάρκεια Διαγωνισμού: 3 ώρες Απαντήστε όλες τις ερωτήσεις Μέγιστο Βάρος (20 Μονάδες) Δίνεται ένα σύνολο από N σφαιρίδια τα οποία δεν έχουν όλα το ίδιο βάρος μεταξύ τους και ένα κουτί που αντέχει μέχρι

Διαβάστε περισσότερα

### MATH423 String Theory Solutions 4. = 0 τ = f(s). (1) dτ ds = dxµ dτ f (s) (2) dτ 2 [f (s)] 2 + dxµ. dτ f (s) (3)

1. MATH43 String Theory Solutions 4 x = 0 τ = fs). 1) = = f s) ) x = x [f s)] + f s) 3) equation of motion is x = 0 if an only if f s) = 0 i.e. fs) = As + B with A, B constants. i.e. allowe reparametrisations

Διαβάστε περισσότερα

### forms This gives Remark 1. How to remember the above formulas: Substituting these into the equation we obtain with

Week 03: C lassification of S econd- Order L inear Equations In last week s lectures we have illustrated how to obtain the general solutions of first order PDEs using the method of characteristics. We

Διαβάστε περισσότερα

### Orbital angular momentum and the spherical harmonics

Orbital angular momentum and the spherical harmonics March 8, 03 Orbital angular momentum We compare our result on representations of rotations with our previous experience of angular momentum, defined

Διαβάστε περισσότερα

### Phys460.nb Solution for the t-dependent Schrodinger s equation How did we find the solution? (not required)

Phys460.nb 81 ψ n (t) is still the (same) eigenstate of H But for tdependent H. The answer is NO. 5.5.5. Solution for the tdependent Schrodinger s equation If we assume that at time t 0, the electron starts

Διαβάστε περισσότερα

### CRASH COURSE IN PRECALCULUS

CRASH COURSE IN PRECALCULUS Shiah-Sen Wang The graphs are prepared by Chien-Lun Lai Based on : Precalculus: Mathematics for Calculus by J. Stuwart, L. Redin & S. Watson, 6th edition, 01, Brooks/Cole Chapter

Διαβάστε περισσότερα

### The Pohozaev identity for the fractional Laplacian

The Pohozaev identity for the fractional Laplacian Xavier Ros-Oton Departament Matemàtica Aplicada I, Universitat Politècnica de Catalunya (joint work with Joaquim Serra) Xavier Ros-Oton (UPC) The Pohozaev

Διαβάστε περισσότερα

### 6.1. Dirac Equation. Hamiltonian. Dirac Eq.

6.1. Dirac Equation Ref: M.Kaku, Quantum Field Theory, Oxford Univ Press (1993) η μν = η μν = diag(1, -1, -1, -1) p 0 = p 0 p = p i = -p i p μ p μ = p 0 p 0 + p i p i = E c 2 - p 2 = (m c) 2 H = c p 2

Διαβάστε περισσότερα

### Geodesic Equations for the Wormhole Metric

Geodesic Equations for the Wormhole Metric Dr R Herman Physics & Physical Oceanography, UNCW February 14, 2018 The Wormhole Metric Morris and Thorne wormhole metric: [M S Morris, K S Thorne, Wormholes

Διαβάστε περισσότερα

### Jackson 2.25 Homework Problem Solution Dr. Christopher S. Baird University of Massachusetts Lowell

Jackson 2.25 Hoework Proble Solution Dr. Christopher S. Baird University of Massachusetts Lowell PROBLEM: Two conducting planes at zero potential eet along the z axis, aking an angle β between the, as

Διαβάστε περισσότερα

### Right Rear Door. Let's now finish the door hinge saga with the right rear door

Right Rear Door Let's now finish the door hinge saga with the right rear door You may have been already guessed my steps, so there is not much to describe in detail. Old upper one file:///c /Documents

Διαβάστε περισσότερα

### Econ 2110: Fall 2008 Suggested Solutions to Problem Set 8 questions or comments to Dan Fetter 1

Eon : Fall 8 Suggested Solutions to Problem Set 8 Email questions or omments to Dan Fetter Problem. Let X be a salar with density f(x, θ) (θx + θ) [ x ] with θ. (a) Find the most powerful level α test

Διαβάστε περισσότερα

### 10/3/ revolution = 360 = 2 π radians = = x. 2π = x = 360 = : Measures of Angles and Rotations

//.: Measures of Angles and Rotations I. Vocabulary A A. Angle the union of two rays with a common endpoint B. BA and BC C. B is the vertex. B C D. You can think of BA as the rotation of (clockwise) with

Διαβάστε περισσότερα

### CHAPTER 48 APPLICATIONS OF MATRICES AND DETERMINANTS

CHAPTER 48 APPLICATIONS OF MATRICES AND DETERMINANTS EXERCISE 01 Page 545 1. Use matrices to solve: 3x + 4y x + 5y + 7 3x + 4y x + 5y 7 Hence, 3 4 x 0 5 y 7 The inverse of 3 4 5 is: 1 5 4 1 5 4 15 8 3

Διαβάστε περισσότερα

### Exercises to Statistics of Material Fatigue No. 5

Prof. Dr. Christine Müller Dipl.-Math. Christoph Kustosz Eercises to Statistics of Material Fatigue No. 5 E. 9 (5 a Show, that a Fisher information matri for a two dimensional parameter θ (θ,θ 2 R 2, can

Διαβάστε περισσότερα

### Partial Differential Equations in Biology The boundary element method. March 26, 2013

The boundary element method March 26, 203 Introduction and notation The problem: u = f in D R d u = ϕ in Γ D u n = g on Γ N, where D = Γ D Γ N, Γ D Γ N = (possibly, Γ D = [Neumann problem] or Γ N = [Dirichlet

Διαβάστε περισσότερα

### ( y) Partial Differential Equations

Partial Dierential Equations Linear P.D.Es. contains no owers roducts o the deendent variables / an o its derivatives can occasionall be solved. Consider eamle ( ) a (sometimes written as a ) we can integrate

Διαβάστε περισσότερα

### SCITECH Volume 13, Issue 2 RESEARCH ORGANISATION Published online: March 29, 2018

Journal of rogressive Research in Mathematics(JRM) ISSN: 2395-028 SCITECH Volume 3, Issue 2 RESEARCH ORGANISATION ublished online: March 29, 208 Journal of rogressive Research in Mathematics www.scitecresearch.com/journals

Διαβάστε περισσότερα

### Lecture 2. Soundness and completeness of propositional logic

Lecture 2 Soundness and completeness of propositional logic February 9, 2004 1 Overview Review of natural deduction. Soundness and completeness. Semantics of propositional formulas. Soundness proof. Completeness

Διαβάστε περισσότερα

### CHAPTER (2) Electric Charges, Electric Charge Densities and Electric Field Intensity

CHAPTE () Electric Chrges, Electric Chrge Densities nd Electric Field Intensity Chrge Configurtion ) Point Chrge: The concept of the point chrge is used when the dimensions of n electric chrge distriution

Διαβάστε περισσότερα

### Chapter 7 Transformations of Stress and Strain

Chapter 7 Transformations of Stress and Strain INTRODUCTION Transformation of Plane Stress Mohr s Circle for Plane Stress Application of Mohr s Circle to 3D Analsis 90 60 60 0 0 50 90 Introduction 7-1

Διαβάστε περισσότερα

### Derivations of Useful Trigonometric Identities

Derivations of Useful Trigonometric Identities Pythagorean Identity This is a basic and very useful relationship which comes directly from the definition of the trigonometric ratios of sine and cosine

Διαβάστε περισσότερα

### Tridiagonal matrices. Gérard MEURANT. October, 2008

Tridiagonal matrices Gérard MEURANT October, 2008 1 Similarity 2 Cholesy factorizations 3 Eigenvalues 4 Inverse Similarity Let α 1 ω 1 β 1 α 2 ω 2 T =......... β 2 α 1 ω 1 β 1 α and β i ω i, i = 1,...,

Διαβάστε περισσότερα

### ΚΥΠΡΙΑΚΗ ΕΤΑΙΡΕΙΑ ΠΛΗΡΟΦΟΡΙΚΗΣ CYPRUS COMPUTER SOCIETY ΠΑΓΚΥΠΡΙΟΣ ΜΑΘΗΤΙΚΟΣ ΔΙΑΓΩΝΙΣΜΟΣ ΠΛΗΡΟΦΟΡΙΚΗΣ 19/5/2007

Οδηγίες: Να απαντηθούν όλες οι ερωτήσεις. Αν κάπου κάνετε κάποιες υποθέσεις να αναφερθούν στη σχετική ερώτηση. Όλα τα αρχεία που αναφέρονται στα προβλήματα βρίσκονται στον ίδιο φάκελο με το εκτελέσιμο

Διαβάστε περισσότερα

### F19MC2 Solutions 9 Complex Analysis

F9MC Solutions 9 Complex Analysis. (i) Let f(z) = eaz +z. Then f is ifferentiable except at z = ±i an so by Cauchy s Resiue Theorem e az z = πi[res(f,i)+res(f, i)]. +z C(,) Since + has zeros of orer at

Διαβάστε περισσότερα

### Durbin-Levinson recursive method

Durbin-Levinson recursive method A recursive method for computing ϕ n is useful because it avoids inverting large matrices; when new data are acquired, one can update predictions, instead of starting again

Διαβάστε περισσότερα

### D Alembert s Solution to the Wave Equation

D Alembert s Solution to the Wave Equation MATH 467 Partial Differential Equations J. Robert Buchanan Department of Mathematics Fall 2018 Objectives In this lesson we will learn: a change of variable technique

Διαβάστε περισσότερα

### Lifting Entry 2. Basic planar dynamics of motion, again Yet another equilibrium glide Hypersonic phugoid motion MARYLAND U N I V E R S I T Y O F

ifting Entry Basic planar dynamics of motion, again Yet another equilibrium glide Hypersonic phugoid motion MARYAN 1 010 avid. Akin - All rights reserved http://spacecraft.ssl.umd.edu ifting Atmospheric

Διαβάστε περισσότερα

### MathCity.org Merging man and maths

MathCity.org Merging man and maths Exercise 10. (s) Page Textbook of Algebra and Trigonometry for Class XI Available online @, Version:.0 Question # 1 Find the values of sin, and tan when: 1 π (i) (ii)

Διαβάστε περισσότερα

### Second Order RLC Filters

ECEN 60 Circuits/Electronics Spring 007-0-07 P. Mathys Second Order RLC Filters RLC Lowpass Filter A passive RLC lowpass filter (LPF) circuit is shown in the following schematic. R L C v O (t) Using phasor

Διαβάστε περισσότερα

### The challenges of non-stable predicates

The challenges of non-stable predicates Consider a non-stable predicate Φ encoding, say, a safety property. We want to determine whether Φ holds for our program. The challenges of non-stable predicates

Διαβάστε περισσότερα

### Differentiation exercise show differential equation

Differentiation exercise show differential equation 1. If y x sin 2x, prove that x d2 y 2 2 + 2y x + 4xy 0 y x sin 2x sin 2x + 2x cos 2x 2 2cos 2x + (2 cos 2x 4x sin 2x) x d2 y 2 2 + 2y x + 4xy (2x cos

Διαβάστε περισσότερα

### Tutorial problem set 6,

GENERAL RELATIVITY Tutorial problem set 6, 01.11.2013. SOLUTIONS PROBLEM 1 Killing vectors. a Show that the commutator of two Killing vectors is a Killing vector. Show that a linear combination with constant

Διαβάστε περισσότερα

### DESIGN OF MACHINERY SOLUTION MANUAL h in h 4 0.

DESIGN OF MACHINERY SOLUTION MANUAL -7-1! PROBLEM -7 Statement: Design a double-dwell cam to move a follower from to 25 6, dwell for 12, fall 25 and dwell for the remader The total cycle must take 4 sec

Διαβάστε περισσότερα

### Other Test Constructions: Likelihood Ratio & Bayes Tests

Other Test Constructions: Likelihood Ratio & Bayes Tests Side-Note: So far we have seen a few approaches for creating tests such as Neyman-Pearson Lemma ( most powerful tests of H 0 : θ = θ 0 vs H 1 :

Διαβάστε περισσότερα

### Lifting Entry (continued)

ifting Entry (continued) Basic planar dynamics of motion, again Yet another equilibrium glide Hypersonic phugoid motion Planar state equations MARYAN 1 01 avid. Akin - All rights reserved http://spacecraft.ssl.umd.edu

Διαβάστε περισσότερα

### 2. Μηχανικό Μαύρο Κουτί: κύλινδρος με μια μπάλα μέσα σε αυτόν.

Experiental Copetition: 14 July 011 Proble Page 1 of. Μηχανικό Μαύρο Κουτί: κύλινδρος με μια μπάλα μέσα σε αυτόν. Ένα μικρό σωματίδιο μάζας (μπάλα) βρίσκεται σε σταθερή απόσταση z από το πάνω μέρος ενός

Διαβάστε περισσότερα

### Concrete Mathematics Exercises from 30 September 2016

Concrete Mathematics Exercises from 30 September 2016 Silvio Capobianco Exercise 1.7 Let H(n) = J(n + 1) J(n). Equation (1.8) tells us that H(2n) = 2, and H(2n+1) = J(2n+2) J(2n+1) = (2J(n+1) 1) (2J(n)+1)

Διαβάστε περισσότερα