How Do You Apply the Divergence Theorem to a Non-Vector Field?

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Homework Help Overview

The discussion revolves around the application of the Divergence Theorem to a scalar surface integral involving the expression ∫∫S (8x + 10y + z²)dS, where S is defined as the sphere x² + y² + z² = 1. Participants are questioning the appropriateness of using the Divergence Theorem in this context, as the integral does not appear to involve a vector field.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants express confusion regarding the application of the Divergence Theorem to a scalar function rather than a vector field. There are inquiries about the transcription of the problem and whether it was presented correctly. Some participants suggest verifying the problem with the instructor.

Discussion Status

The discussion is ongoing, with participants exploring the implications of the problem statement and questioning the validity of applying the Divergence Theorem as it is currently framed. There is no consensus reached, but the dialogue indicates a productive examination of the assumptions involved.

Contextual Notes

Participants note that the equation provided for the Divergence Theorem may not be applicable as it stands, leading to further questioning of the problem's requirements and the nature of the integral.

craig16
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Homework Statement



Use the Divergence Theorem to evaluate ∫∫S (8x + 10y + z2)dS where S is the sphere x2 + y2 + z2 = 1.


Homework Equations



∫∫S F dS = ∫∫∫B Div(F) dV

The Attempt at a Solution



I dunno, this isn't a vector field so I don't know how to take the divergence of it so I can integrate..
 
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craig16 said:

Homework Statement



Use the Divergence Theorem to evaluate ∫∫S (8x + 10y + z2)dS where S is the sphere x2 + y2 + z2 = 1.


Homework Equations



∫∫S F dS = ∫∫∫B Div(F) dV

The Attempt at a Solution



I dunno, this isn't a vector field so I don't know how to take the divergence of it so I can integrate..

Use the X2 button above the advanced editing box for superscripts. Are you certain you have transcribed the problem correctly?
 
Yeah, I'm sure.
have you ever seen something like this?
 
As it is written it is just a scalar surface integral which makes sense and can be evaluated. The reason I asked is your relevant equation: ∫∫S F dS = ∫∫∫B Div(F) dV isn't written correctly; it should be \iint_S \vec F \cdot d\vec S on the left. I just wondered if your original problem was mistranscribed. But, no, your original problem wouldn't have anything to do with the divergence theorem as it is written.
 
Last edited:
Which is why it makes me curious that they asked me to use the divergence theorem.
lol.. I dunno
 
craig16 said:
Which is why it makes me curious that they asked me to use the divergence theorem.
lol.. I dunno

I'm curious too. Why don't you ask your teacher and tell us what you find out?
 

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