Why the cell of an atom is positively charged?

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.