The electric potential at a certain distance from a point charge can be represented by V. What is the value of the electric potential at twice the distance from the point charge?

The value of the electric potential is V/2.

Explanation:

V = K q/r

V = Electric Potential

K= Coulomb constant

q = Charge

r = distance of sepearation

Electric Potential is inversely proportional to distance. Hence if distance of separation is increased by twice effective Electric potential be halved (V/2)

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods