PHYS 3900 Homework Set #04 Due: Mon
Physics 3900 University of Georgia Spring 2019 Instructor: HBSch¨uttler PHYS 3900 Homework Set #04 Due: Mon. Mar. 18, 2019, 4:00pm (All Parts!) All textbook problems assigned, unless otherwise stated, are from the textbook by M. Boas Mathematical Methods in the Physical Sciences, 3rd ed. Textbook sections are identified as "Ch.cc.ss" for textbook Chapter "cc", Section "ss". Complete all HWPs assigned: only two of them will be graded; and you don't know which ones! Read all "Hints" before you proceed! Make use of the latest version of the "PHYS3900 Homework Toolbox", posted on the course web site. Do not use the calculator, unless so instructed! All arithmetic, to the extent required, is either elementary or given in the problem statement. State all your answers in terms of p real-valued elementary functions (+, −, =, ×, power, root, , exp, ln, sin, cos, tan, cot, arcsin, arccos, arctan, arcot; :::) of integer numbers, e and π; in terms of i where needed; and in terms of specific input variables, as stated in each problem. So, for example, if the result is, say, ln(7=2) + p(e5π=3), or 179=2, or (16−4π)−10, then just state that as your final answer: no need to evaluate it as decimal number by calculator! Simplify final results to the largest extent possible; e.g., reduce fractions of integers to the smallest denominator etc.. 1 Physics 3900 University of Georgia Spring 2019 Instructor: HBSch¨uttler HWP 04.01: Divergence and curl of a vector field. (a) Calculate the divergence and the curl of the vector field ~ 2 2 F (~r) ≡ [Fx(~r);Fy(~r);Fz(~r)] = [2z ; 3z ; (4x + 6y)z] where ~r ≡ [x; y; z] : (b) Use Stokes's Theorem to show that the line integral of F~ (~r) over any curve L, given by Z F~ (~r) · d~r; L depends only on the start- and endpoint of L, but not on the trajectory of L between those two points.
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