(III) Two positive charges are affixed rigidly to the x axis, one at and the other at A third charge of mass m, which is constrained to move only along the x axis, is displaced from the origin by a small distance and then released from rest. (a) Show that (to a good approxima- tion) will execute simple harmonic motion and deter- mine an expression for its oscillation period T. (b) If these three charges are each singly ionized sodium atoms at the equilibrium spacing typical of the atomic spacing in a solid, find T in picoseconds.

The substances that are necessary for producing of certain hormones and that store and transport vitamins

You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 23.7n and the spring scale reads 13.8n. what is the magnitude of the force that earth exerts on the bag?

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin.answer in one word.part bfind e(r), the magnitude of the electric field at distance r from the point charge q.express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q.express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r