Math 206 Section A Take-home Exam: Integration and Vector Calculus, Exams of Mathematics

A take-home exam for math 206 section a, focusing on integration and vector calculus. Students are required to sketch regions of integration, evaluate integrals using cartesian, spherical, and cylindrical coordinates, find mass of a sphere, and calculate line integrals. No numerical methods are allowed.

Typology: Exams

2012/2013

Uploaded on 03/07/2013

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Math 206 Section A
Take-home Exam
50 points
Name:
Show all your work to receive full credit for a problem.
Attach this sheet to the solutions you hand in. Even if you attempt the problems in
any order, write the solutions in the chronological order.
1. (8 points) Sketch the region of integration and evaluate the following integral. If necessary,
switch the order of integration. Switch to polar coordinates if needed. Do not use numerical
methods to evaluate the integral.
Z1
0Z1
y
2+x3dx dy .
pf3
pf4
pf5

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Math 206 Section A

Take-home Exam

50 points

Name:

Show all your work to receive full credit for a problem.

Attach this sheet to the solutions you hand in. Even if you attempt the problems in any order, write the solutions in the chronological order.

  1. (8 points) Sketch the region of integration and evaluate the following integral. If necessary, switch the order of integration. Switch to polar coordinates if needed. Do not use numerical methods to evaluate the integral.

∫ (^1)

0

√y

2 + x^3 dx dy.

  1. (9 points) Let f(x, y, z) = x^2 + y^2 + z^2 and let S be the solid bounded below by the cone z =

x^2 + y^2 and above by the sphere x^2 + y^2 + z^2 = 1. Write

S f(x, y, z)^ dV^ as an iterated integral in Cartesian coordinates, spherical coordinates and cylindrical coordinates. Do not evaluate any of the three integrals.

  1. (8 points) Find the mass of the sphere x^2 + y^2 + z^2 = 4 if the per-unit-area density at each point of the sphere is given by g(x, y, z) =

4 − x^2 − y^2.

  1. (9 points) Let F~ = (y, −x) and let M be the disk in the xy-plane given by x^2 + y^2 ≤ 1 oriented upward. Let C be the circle of radius 1 in the xy-plane centered at the origin and oriented counterclockwise.

(a) Evaluate

C F~ · d~x.

(b) Evaluate

M curl^ F~ · ~n dσ.

(c) How do the answers in parts (a) and (b) compare? How are C and M related?