Just a quick question about notation.
I was given the vector field
F = r + grad(1/bar(r)) where r= (x)i+(y)j+(z)k.
grad is just written as the upside down delta (gradient) and the bar I wrote in the above equation looks like an absolute value around just the r (although I don't think it is absolute value).
What would be a simplification of this vector field so that I can solve the rest of the problem?
I want to find its flux across the surface of a sphere.