The intensities of earthquakes are measured with seismographs all over the world at different distances from the epicenter. Suppose that the intensity of a medium earthquake is originally reported as 10 5.4 times I 0 . Later this value is revised as 10 5.8 times I 0 . a. Determine the magnitude of the earthquake using the original estimate for intensity. b. Determine the magnitude using the revised estimate for intensity. c. How many times more intense was the earthquake than originally thought? Round to 1 decimal place.
The intensities of earthquakes are measured with seismographs all over the world at different distances from the epicenter. Suppose that the intensity of a medium earthquake is originally reported as 10 5.4 times I 0 . Later this value is revised as 10 5.8 times I 0 . a. Determine the magnitude of the earthquake using the original estimate for intensity. b. Determine the magnitude using the revised estimate for intensity. c. How many times more intense was the earthquake than originally thought? Round to 1 decimal place.
Solution Summary: The author calculates the magnitude of the earthquake when its revised intensity is 105.8I_0.
The intensities of earthquakes are measured with seismographs all over the world at different distances from the epicenter. Suppose that the intensity of a medium earthquake is originally reported as
10
5.4
times
I
0
.
Later this value is revised as
10
5.8
times
I
0
.
a. Determine the magnitude of the earthquake using the original estimate for intensity.
b. Determine the magnitude using the revised estimate for intensity.
c. How many times more intense was the earthquake than originally thought? Round to 1 decimal place.
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.
University Calculus: Early Transcendentals (4th Edition)
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