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Serhud
2 months ago
15

Are the following statements true or false? 1. If F⃗ is a vector field in 3-dimensional space, and W is a solid region with boun

dary surface S, then ∬SF⃗ ⋅dS⃗ =∭Wdiv(F⃗ )dV. 2. If F⃗ and G⃗ are vector fields satisfying div(F⃗ )=div(G⃗ ), then F⃗ =G⃗ . 3. If ∬SF⃗ ⋅dS⃗ =12 and S is a flat disk of area 4π, then div(F⃗ )=3/π. 4. If F⃗ is a vector field in 3-dimensional space satisfying div(F⃗ )=1, and S is a closed surface oriented outward, then ∬SF⃗ ⋅dS⃗ is equal to the volume enclosed by S. 5. If F⃗ is a vector field in 3-dimensional space, then grad(div(F⃗ ))=0⃗ .
Mathematics
1 answer:
lawyer [12.5K]2 months ago
8 0

Answer:

Step-by-step explanation:

1) True. This stems from the fact that the divergence of F is 1, indicating that F is a linear function. The orientation is outward from the surface. Integrating a linear function over a surface with outward orientation leads to the volume enclosed by that surface.

2) True. This is fundamentally what the Divergence theorem states.

3) False. Had F been specified as 3/pi instead of div(F), this claim would have held true.

4) False. The gradient of divergence can vary. The curl of the divergence of a vector function is 0, contradicting the notion of the gradient of divergence being 0.

5) False. While calculating divergence, derivatives are computed for different variables. Since the derivative of constants is 0, both vector functions F and G can contain distinct constant components even when their divergences are equal.

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Find the GCF of monomials 34s^2t and 96st^2
tester [12383]
Provide the GCF for the monomials 34s^2t and 96st^2.
6 0
1 month ago
Level curves for barometric pressure (in millibars) are shown for 6:00 AM on November 10, 1998. A deep low with pressure 972 mb
AnnZ [12381]

Answer: the directional derivative value of the pressure function at Kearney moving toward Sioux City is - 0.09 mb/km

Step-by-step explanation:

Let’s assume P represents the pressure function

The calculation for the directional derivative of pressure at Kearney directed towards Sioux City will be denoted as DuP

The line connecting Kearney to Sioux City starts on the level curve representing a pressure of 1000mb

and ends on the level curve representing a pressure of 972 mb

thus letting X1 = 1000 mb

X2 = 972 mb

the distance between Kearney and Sioux is d = 300 km

So to approximate the directional derivative DuP at Kearney towards Sioux City, we assess the average rate of pressure change between both locations

therefore DuP  = (X2 - X1) / d

= (972 - 1000) / 300

= -28 / 300

= - 0.09 mb/km

Thus, the directional derivative value of the pressure function at Kearney in the direction of Sioux City is - 0.09 mb/km

7 0
3 months ago
2. A boy and his father played 26 games of checkers. For every game the boy lost, he gave his father 5 cents. For every game the
zzz [12365]

Answer: the boy won 10 games

Step-by-step explanation:

Let's denote B for the games won by the boy, and F for the games the father won.

We know that there are a total of 26 games:

B + F = 26.

For each game the boy wins, he gains 8 cents, while for each game lost to his father, he loses 5 cents. Since at the conclusion of the 26 games his total earnings net to zero, we have:

B*8 + F*(-5) = 0.

Now we form a system of equations:

B + F = 26

8*B - 5*F = 0.

Our first move is to isolate one variable. We'll start by expressing F in terms of B using the first equation:

B + F = 26

F = 26 - B.

Now substituting this into the second equation gives us:

8*B - 5*F = 0

8*B - 5*(26 - B) = 0

8*B + 5*B - 5*26 = 0

13*B = 5*26

B = 5*26/13 = 5*2 = 10

Thus, the boy emerged victorious in 10 games (the father won the remaining 16 games).

7 0
2 months ago
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