Coordinate systems all centred at the same origin x = y = z = 0: b=-p-20+2, c=37 +30-2φ where i, j, k are cartesian, ρ, φ,2 are cylindrical, and t, θ, φ are spherical. (a) draw a picture with all three vectors. what are their magnitudes? (b) what are the dot products a. b, a c, and b c? (c) what are the cross products a × b, a × c, and b x c?

i was thinking more like reflects green light, just not sure

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)