Membrane Potential and Permittivity

AI Thread Summary
The discussion revolves around a request for assistance with a specific homework question related to membrane potential and permittivity. The user has shared images of the question and their attempt at a solution, indicating they feel they may be overlooking a crucial aspect. They express frustration at being unable to identify the missing element in their reasoning. The conversation seeks collaborative input to clarify the concepts involved in the problem. Overall, the user is looking for guidance to enhance their understanding and complete their assignment effectively.
alex_b93
Messages
12
Reaction score
0
Hi,
Was wondering if I could get some help with part b of this question?
I've attached the question and my attempt in the pictures as there was a lot of data and writing, so thought this would be the easiest way.

With my attempt I think I'm missing something pretty obvious, but I'm drawing a blank on it.

Cheers

Homework Statement



See pictures attached

Homework Equations



See pictures attached

The Attempt at a Solution



See pictures attached
 

Attachments

  • IMG_20120322_155129.jpg
    IMG_20120322_155129.jpg
    42.1 KB · Views: 398
  • IMG_20120322_155206.jpg
    IMG_20120322_155206.jpg
    23.8 KB · Views: 395
Physics news on Phys.org
Can anyone help at all?
 
Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
Back
Top