Answers to even-numbered homework problems
Section 20.3
2.
The curl is
0
(that is, the zero vector field).
6.
Curl
F
= (2
x
3
yz
+ 6
x
7
y
5
-
xy
)
i
- (3
x
2
y
2
z
+ 7
x
6
y
6
-
y
)
j
+ (
yz
-
z
)
k
Section 20.4
4.
a)
-200 Pi
b)
0
12.
-8 Pi