Two objects are in uniform circular motion at the same speed but at different radii. the ones with the __ radius has the largest centripetal acceleration.

the one with the smaller radius has the highest centripetal force

Explanation:

The one with the smaller radius has the greater centripetal FORCE.

We can't say anything about the centripetal acceleration, because that also depends on their masses, which you haven't told us.

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.)

cant without the picture! ?