1. J

    Conducting shell charge

    I'm looking at the charge and field lines created in and around a conducting sphere that encloses a net charge that is NOT centered in the shell. I understand how the electric field acts outside the sphere-as though all the charge was centered in the sphere. I also understand that the sphere...
  2. timemachine2

    If you raise the electron to other higher shell states, can light transmission throug

    -h a SOLID BLACK opaque object. So the energy levels of EM waves increase asfrom radio to X-rays, to gamma waves. If put the electron in the highest shell, or a shell second to the highest, then shine a wavelength of light, that has the lowest wavelength, which is red light. So you shine this...
  3. D

    Projectile Motion question. Only distance given.

    How would I do this? (Especially a. and b.) The cannon on a battleship can fire a shell a maximum distance of 41.0 km. (a) Calculate the initial velocity of the shell. m/s (b) What maximum height does it reach? (At its highest, the shell is above a substantial part of the...
  4. A

    Potential of Non-Uniformly Charged Spherical Shell

    A thin spherical shell of radius R carries a surface charge density of the form kcos^3 θ . Find the electric field inside and outside the sphere and demonstrate explicitly that its components satisfy the relevant boundary conditions at the surface. So, I can work this all the way to...
  5. C

    Are shell electrons accompanied by virtual neutrinos?

    Hi everyone, This is my first post. Years ago I read in a science magazine that (at least according to a certain theory) every shell electron would be accompanied by one (or was it two?) virtual neutrino(s). At least that's my recollection of what I read. I know it sounds a little crazy. I was...
  6. A

    Gauss' Law for spherical shell vs Coulomb's law, regarding reativity

    Shalom We are used to hearing that Coulomb's law doesn't settle with the relativity principle that nothing moves faster than the speed of light, in the sence that it embeds 'Action in a Distance'. Meaning that if somthing changes in r1 at time t1, and we write the law for any t before...
  7. U

    Projectile Motion of a mortar shell!!! HELP

    Hey!! I have this question which I am having trouble answering. 'If a mortar shell has to be fired over a 10m high house 20m away on a straight line, what elevation must it be fired at?' In order to answer it, I have already solved: max height: 47.2m range: 188.7m horizontal velocity at...
  8. B

    shell explosion and center of mass

    A shell at rest explode. The center of mass of fragments : a>moves along parabolic path b>moves along straight line c>moves along elliptical path d>remain at rest also post how I wonder whats relation between explosion and center of mass of particle.
  9. L

    Inner charge of a shell

    In the figure below, a solid sphere, of radius a = 3.00 cm is concentric with a spherical conducting shell of inner radius b = 2.00a and outer radius c = 2.40a. The sphere has a net charge q1 = +2.00 fC which is distributed uniformly through the sphere; the shell has a net charge of q2 = -q1...
  10. A

    Spheric shell (check my error)

    A spherical shell with radius of 6 cm gives a uniform density superfial charge \alpha = 9x10^{-9}C/m^2. Find the electr field in (a) r = 6,1 cm (b) r = 10 cm My solution: E = \frac{kq}{r^2} d) E = 967,48 N/C e) E = 360 N/C But the answer is: a) 984 N/C b) 0,36 N/C
  11. A

    Cylindrical shell

    A cylindrical shell with 200 m long and 6 cm in radius gives a surface density of charge uniform \alpha = 9x10^{-9}C/m^2. (a) What is the total charge of the shell ? Determine the electric field in (b) r = 2cm, (c) r = 5,9 cm (d) r = 6,1 cm (e) r = 10 cm
  12. A

    Electric field of half a spherical shell

    Hey guys. I've been trying to solve this question using Gauss law but I can't think of a surface that can contain this thing. Is there another way to solve this? Thanks a lot.
  13. A

    Half charged spherical shell

    Hey guys. I got this question: "Calculate the electric field of half a spherical shell with radius R and uniform surface charge density \sigma along its axis of symmetry above the shell." I guess I shell use Gauss law, the thing is that the Gauss surface will not be closed above the half...