What are the assumptions for solving the charged conducting disk problem?

AI Thread Summary
The discussion revolves around the assumptions needed to solve the charged conducting disk problem, particularly due to the lack of a diagram in the question. Participants express uncertainty about the initial setup and suggest that it may be assumed that the electrons in the disk remain stationary. There is a reference to an external blog for further insights on the topic. Clarification on these assumptions is crucial for progressing with the solution. Understanding the behavior of electrons in the disk is essential for accurately addressing the problem.
hairey94
Messages
15
Reaction score
2
Homework Statement
Four electrons are released onto a thin aluminum disc of diameter 10𝑚𝑚. If the disc is initially neutral, calculate the electric potential at the center of the disc and the energy stored in the disc.
Relevant Equations
V = kQ/r
Not sure how the problem set up initially as no diagram was provided in the question. Please help me to start with the solution. Your assumptions and educated guess are appreciated.
 
Physics news on Phys.org
I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
Thread 'A cylinder connected to a hanging mass'
Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
Back
Top