A Help with Math: 2.28-2.29 to 2.31-2.34

  • A
  • Thread starter Thread starter daisy496
  • Start date Start date
AI Thread Summary
The discussion revolves around a user's confusion regarding the transition from mathematical concepts in sections 2.28-2.29 to 2.31-2.34. Participants emphasize the importance of identifying the specific problem area to provide effective assistance. They suggest using the forum's "Attach files" feature for sharing images instead of external sites, ensuring clarity in communication. The conversation highlights that the math involved consists of standard manipulations with differential operators and integrals in vector calculus. Overall, the focus is on pinpointing the exact step where understanding is lacking to facilitate better support.
daisy496
Messages
2
Reaction score
0
Hello,
I'm lost on how to get from 2.28-2.29 to 2.31-2.34! Please help
 
Physics news on Phys.org
Where is your specific problem?
 
In the following solution, I don’t understand the math step in 7.18 to reach 7.21, can you help detail it for me please:
 
There's no need to use imgur or some similar site, to post images here. Instead, use the "Attach files" button to upload image files to this forum. After they have been uploaded, you will see buttons for choosing whether to display thumbnails or the full images.
 
I also still don't know, where the specific proplem is. These are all standard manipulations with differential operators and integrals of vector calculus. There must be one specific step, where you lack understanding. Maybe we can help you, when you point at it. Otherwise we can only repeat the derivation and again most probably miss to help you with your specific problem.
 
jtbell said:
There's no need to use imgur or some similar site, to post images here. Instead, use the "Attach files" button to upload image files to this forum. After they have been uploaded, you will see buttons for choosing whether to display thumbnails or the full images.
You can even just cut and paste. And if the useful part is only a fraction of the whole picture, PLEASE use snippet to copy only that part !
 
Thread 'Gauss' law seems to imply instantaneous electric field'

Thread 'Gauss' law seems to imply instantaneous electric field'

Imagine a charged sphere at the origin connected through an open switch to a vertical grounded wire. We wish to find an expression for the horizontal component of the electric field at a distance ##\mathbf{r}## from the sphere as it discharges. By using the Lorenz gauge condition: $$\nabla \cdot \mathbf{A} + \frac{1}{c^2}\frac{\partial \phi}{\partial t}=0\tag{1}$$ we find the following retarded solutions to the Maxwell equations If we assume that...
View full post »

Thread 'Do electron density waves accompany EM waves in coaxial cables?'

Maxwell’s equations imply the following wave equation for the electric field $$\nabla^2\mathbf{E}-\frac{1}{c^2}\frac{\partial^2\mathbf{E}}{\partial t^2} = \frac{1}{\varepsilon_0}\nabla\rho+\mu_0\frac{\partial\mathbf J}{\partial t}.\tag{1}$$ I wonder if eqn.##(1)## can be split into the following transverse part $$\nabla^2\mathbf{E}_T-\frac{1}{c^2}\frac{\partial^2\mathbf{E}_T}{\partial t^2} = \mu_0\frac{\partial\mathbf{J}_T}{\partial t}\tag{2}$$ and longitudinal part...
View full post »

Similar threads

The Quantum Uncertainty of a Particle
Replies
13
Views
1K
MHB Is \( R[x,y] \) Isomorphic to \( R[y,x] \)?
Replies
7
Views
2K
Prove forces of semiholonomic constraints do no virtual work
Replies
11
Views
4K
I Help please -- Trying to figure out rake barge capacity and displacement
Replies
8
Views
2K
Time of Electron/Proton to Radiate Away Half of Their Energy
Replies
2
Views
4K
How much heat in joules is needed to raise the temperature
Replies
4
Views
2K
I Split Exact Sequences .... Bland, Proposition 3.2.7
Replies
12
Views
3K
MHB How does Conway's Theorem 2.29 Derive the Simplified Expression for f(z)?
Replies
2
Views
2K
Two charged spheres are brought into physical contact with each other.
Replies
4
Views
3K
MHB Direct Sum of n Vector Spaces Over F - Knapp Proposition 2.31 - Pages 61-62
Replies
2
Views
1K

Hot Threads

Recent Insights

Back
Top