Let F x , y , z = a i + b j + c k be a constant vector field and let σ be the surface of a solid G . Use the Divergence Theorem to show that the flux of F across σ is zero. Give an informal physical explanation of this result.
Let F x , y , z = a i + b j + c k be a constant vector field and let σ be the surface of a solid G . Use the Divergence Theorem to show that the flux of F across σ is zero. Give an informal physical explanation of this result.
Let
F
x
,
y
,
z
=
a
i
+
b
j
+
c
k
be a constant vector field and let
σ
be the surface of a solid G. Use the Divergence Theorem to show that the flux of F across
σ
is zero. Give an informal physical explanation of this result.
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.
Find the flux of the vector field V(x, y, z) = 9xy2i + 9x2yj + z3k out of the unit sphere.
Match each of the following three vector fields to one of the four vector
fields graphed below (yes, one graph does not have a match), and then explain your thinking:
1.
(a) F(x, y) = (2y, 2.r).
Match (circle one): I II III IV
(b) F(x, y) = (x², 2y).
Match (circle one): I II III IV
(c) F(x, y) = (x², y²).
Match (circle one): I II III IV
(d) Explain your choices.
Explanation:
a) What is the flux of the constant vector field F = (a, b, c) through any closed surface?
b) Is the flux of F = (x³, y³, z³) through any closed surface positive, negative, or zero?
Chapter 15 Solutions
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Precalculus: Mathematics for Calculus - 6th Edition
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