Why does alternating current change direction 50 to 60 times per second?
A) because it is produced by a generator that changes current direction as it spins
B) because magnetic fields from the generator attract and repel the current C) because it travels at the speed of light back and forth across the circuit D) because it can only travel a short distance before being attracted back to where it started

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

if you're asking what comes out, it's steam.