What’s wrong? Consider the radial field F = ( x , y ) x 2 + y 2 . a. Verify that the divergence of F is zero, which suggests that the double integral in the flux form of Green’s Theorem is zero. b. Use a line integral to verify that the outward flux across the unit circle of the vector field is 2 π . c. Explain why the results of parts (a) and (b) do not agree.
What’s wrong? Consider the radial field F = ( x , y ) x 2 + y 2 . a. Verify that the divergence of F is zero, which suggests that the double integral in the flux form of Green’s Theorem is zero. b. Use a line integral to verify that the outward flux across the unit circle of the vector field is 2 π . c. Explain why the results of parts (a) and (b) do not agree.
What’s wrong? Consider the radial field
F
=
(
x
,
y
)
x
2
+
y
2
.
a. Verify that the divergence of F is zero, which suggests that the double integral in the flux form of Green’s Theorem is zero.
b. Use a line integral to verify that the outward flux across the unit circle of the vector field is 2π.
c. Explain why the results of parts (a) and (b) do not agree.
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
Let a = (-1, -2, -3) and 6 = (-4, 0, 1).
Find the component of b onto a.
Forces of 9 pounds and 15 pounds act on each other with an angle of 72°.
The magnitude of the resultant force
The resultant force has an angle of
pounds.
* with the 9 pound force.
The resultant force has an angle of
with the 15 pound force.
It is best to calculate each angle separately and check by seeing if they add to 72°.
=
Let (6,2,-5) and = (5,4, -6).
Compute the following:
บี.บี.
บี. นี =
2
−4(u. v) =
(-4). v=
ū. (-40)
(ū. v) v =
Chapter 17 Solutions
Calculus: Early Transcendentals, Books a la Carte, and MyLab Math with Pearson eText -- Title-Specific Access Card Package (3rd Edition)
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