Aparallel-plate vacuum capacitor has 7.64 j of energy stored in it. the separation between the plates is 2.30 mm. if the separation is decreased to 1.30 mm, a) what is the energy now stored if the capacitor was disconnected from the potential source before the separation of the plates was changed? b) what is the energy now stored if the capacitor remained connected to the potential source while the separation of the plates was changed?

What is the major limitation to the light microscope?

To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0

Contains chemical energy. a. heat b. light c. natural gas