What angle (in degrees) is needed between the direction of polarized light and the axis of a polarizing filter to cut its intensity to one-third of its initial value

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.)

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide