A curve C is called a flow line of a vector field F if F is a tangent vector to C at each point along C (See the accompanying figure). (a) Let C be a flow line for F( x , y ) = − y i+ x j, and let ( x , y ) be a point on C for which y ≠ 0. Show that the flow lines satisfy the differential equation d y d x = − x y (b) Solve the differential equation in part (a) by separation of variables, and show that the flow lines are concentric circles centered at the origin.
A curve C is called a flow line of a vector field F if F is a tangent vector to C at each point along C (See the accompanying figure). (a) Let C be a flow line for F( x , y ) = − y i+ x j, and let ( x , y ) be a point on C for which y ≠ 0. Show that the flow lines satisfy the differential equation d y d x = − x y (b) Solve the differential equation in part (a) by separation of variables, and show that the flow lines are concentric circles centered at the origin.
A curve C is called a flow line of a vector field F if F is a tangent vector to C at each point along C (See the accompanying figure).
(a) Let C be a flow line for
F(
x
,
y
)
=
−
y
i+
x
j,
and let
(
x
,
y
)
be a point on C for which
y
≠
0.
Show that the flow lines satisfy the differential equation
d
y
d
x
=
−
x
y
(b) Solve the differential equation in part (a) by separation of variables, and show that the flow lines are concentric circles centered at the origin.
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.
4. Use method of separation of variable to solve the following wave equation
მłu
J²u
subject to
u(0,t) =0, for t> 0,
u(л,t) = 0, for t> 0,
=
t> 0,
at²
ax²'
u(x, 0) = 0,
0.01 x,
ut(x, 0) =
Π
0.01 (π-x),
0
Solve the following heat equation by method of separation variables:
ди
=
at
subject to
u(0,t) =0, for
-16024
ძx2 •
t>0, 0 0,
ux (4,t) = 0, for
t> 0,
u(x, 0) =
(x-3,
\-1,
0 < x ≤2
2≤ x ≤ 4.
ex
5.
important aspects.
Graph f(x)=lnx. Be sure to make your graph big enough to easily read (use the space given.) Label all
6
33
University Calculus: Early Transcendentals (4th Edition)
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