A plane heading S 21 ° E with an an air speed of 375 mph encounters a wind blowing due east at 28 mph . a. Express the velocity of the plane v p relative to the air and the velocity of the wind v w in terms of i and j. Round components to 1 decimal place. b. Find the velocity of the plane relative to the ground v g and the speed of the plane relative to the ground. Round the speed to the nearest mph. c. Find the bearing of the plane relative to the ground. Round to the nearest tenth of a degree.
A plane heading S 21 ° E with an an air speed of 375 mph encounters a wind blowing due east at 28 mph . a. Express the velocity of the plane v p relative to the air and the velocity of the wind v w in terms of i and j. Round components to 1 decimal place. b. Find the velocity of the plane relative to the ground v g and the speed of the plane relative to the ground. Round the speed to the nearest mph. c. Find the bearing of the plane relative to the ground. Round to the nearest tenth of a degree.
A plane heading
S
21
°
E
with an an air speed of
375
mph
encounters a wind blowing due east at
28
mph
.
a. Express the velocity of the plane
v
p
relative to the air and the velocity of the wind
v
w
in terms of i and j. Round components to 1 decimal place.
b. Find the velocity of the plane relative to the ground
v
g
and the speed of the plane relative to the ground. Round the speed to the nearest mph.
c. Find the bearing of the plane relative to the ground. Round to the nearest tenth of a degree.
3.1 Limits
1. If lim f(x)=-6 and lim f(x)=5, then lim f(x). Explain your choice.
x+3°
x+3*
x+3
(a) Is 5
(c) Does not exist
(b) is 6
(d) is infinite
1 pts
Let F and G be vector fields such that ▼ × F(0, 0, 0) = (0.76, -9.78, 3.29), G(0, 0, 0) = (−3.99, 6.15, 2.94), and
G is irrotational. Then sin(5V (F × G)) at (0, 0, 0) is
Question 1
-0.246
0.072
-0.934
0.478
-0.914
-0.855
0.710
0.262
.
2. Answer the following questions.
(A) [50%] Given the vector field F(x, y, z) = (x²y, e", yz²), verify the differential identity
Vx (VF) V(V •F) - V²F
(B) [50%] Remark. You are confined to use the differential identities.
Let u and v be scalar fields, and F be a vector field given by
F = (Vu) x (Vv)
(i) Show that F is solenoidal (or incompressible).
(ii) Show that
G =
(uvv – vVu)
is a vector potential for F.
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