Water vapor is an example of a(n)

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge, at the position of the second charge, change if the second charge is doubled? a. the field does not change b. the field strength decreases by half. c. the field strength doubles d. the field strength quadruples

Does heating a metal wire increase or decrease its electrical resistance? why?

Am i correct on these two physics questions?