In the following exercises, suppose a solid object in ℝ 3 has a temperature distribution given by T ( x , y , z ) . The heat flow vector field in the object is F = − k ∇ T , where k > 0 is a property of the material. The heat flow vector points in the direction opposite to that of the gradient, which is the direction of greatest temperature decrease. The divergence of the heat flow vector is ∇ ⋅ F = − k ∇ ⋅ ∇ T = − k ∇ 2 T . 267. Compute the divergence.
In the following exercises, suppose a solid object in ℝ 3 has a temperature distribution given by T ( x , y , z ) . The heat flow vector field in the object is F = − k ∇ T , where k > 0 is a property of the material. The heat flow vector points in the direction opposite to that of the gradient, which is the direction of greatest temperature decrease. The divergence of the heat flow vector is ∇ ⋅ F = − k ∇ ⋅ ∇ T = − k ∇ 2 T . 267. Compute the divergence.
In the following exercises, suppose a solid object in
ℝ
3
has a temperature distribution given by
T
(
x
,
y
,
z
)
. The heat flow vector field in the object is
F
=
−
k
∇
T
, where
k
>
0
is a property of the material. The heat flow vector points in the direction opposite to that of the gradient, which is the direction of greatest temperature decrease. The divergence of the heat flow vector is
∇
⋅
F
=
−
k
∇
⋅
∇
T
=
−
k
∇
2
T
.
267. Compute the divergence.
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.
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