Recent content by Zubilaemo

Homework Statement http://img338.imageshack.us/img338/9682/spaceships.gif V1, V2, U, alpha are given. The red spaceship is moving left in Velocity V1 (in the lab system) and a ball is thrown in angle alpha and speed U(in the red spaceship system). What is Alpha in the Blue system...

OK so this is how I solved it (with some help from a friend): because the middle shell is grounded the total potential of it is Zero. This potential is also calculated from the "donations" of Sphere 1 and Shell 3 and this is what determines the charge that exists on the shell. So: (Q*10^6)/C +...

you mean Pot=-Integral(E) ? I suppose I could do that, but then in order to know E I need to know the charge... :)

Like i corrected myself earlier, the middle is a shell not the sphere. the only sphere is the middle one. The inner sphere is equally distibuted. the outer shells are contuctive. Hmm. You're seriously making me wonder if the answer isn't simply Zero.. :)

I can calculate the potential from the charge... how else would i calculate the potential?

Hmm.. Yeah, I meant Shell. But - Why should the outer shell have any influence on the potential if the middle shell is grounded?

Hey! I thought that the 1MC charge didn't have any effect, as it surrounds a grounded sphere. Perhaps I was wrong in this assumption?

thanks for your help! It's just that I don't understand what the result of the grounding is in this case - what does this mean about the charge of the middle shell? What I thought is that the charge on the inside of the middle shell is -1Q, and thus the potential in the centre is Q/a-Q/b, but...

thanks for your help! It's just that I don't understand what the result of the grounding is in this case - what does this mean about the charge of the middle shell? What I thought is that the charge on the inside of the middle shell is -1Q, and thus the potential in the centre is Q/a-Q/b, but...

Hi Everyone! I'm new to this forum, and English isn't my first language - I would really appreciate your help with this question :) Homework Statement http://img225.imageshack.us/img225/3807/1milliontotheground.jpg there are given 2 thin shells with radiuses b and c, and a full sphere...