A solid non-conducting spherical shell of total charge Q, inner radius a and outer radius b is centered at the origin and has a charge distributed uniformly through it's volume. At the origin in the center of the hollow region is an unknown point charge q. Calculate an expression for the electric field E at point P within the non-conducting sphere. I

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Explain the consequences of this addiction to the brain tissue

What will a positive and a negative charge do if they are separated from each other?