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skidkid
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Homework Statement
The distance between the oxygen nucleus and each of the oxygen nuclei in an H2O molecule is 9.58*10^-11m; the angle between the H atoms is 105 degrees. Find the electric field produced by the nuclear charges (positive charges) at the point P at a distance of 1.20*10^-10m to the right of the oxygen nucleus.
Homework Equations
The law of cosines.
The Attempt at a Solution
I used the law of cosines to find the distance from the oxygen atom to the point P, but I don't know where to go from there.