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?

“other instruments such as gravimeters and magnetometers are also used in the search for petroleum. extracting crude oil normally starts with drilling wells into an underground reservoir. when an oil well has been tapped, a geologist (known on the rig as the "mudlogger") will note its presence. “ this is what i found on google i hope it

Sorry i don’t know what to do

Ibelieve the answer is either b or c, but i'm leaning more towards c.hope my answer has you : )

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.