A device found at some amusement parks asks you to "test your personal force" by grasping two conducting bars, one in each hand, and tolerating a muscle-clenching flow of direct current through your body. Assuming that your body is an ohmic material, the resistance of your body between your two hands (if you are not sweating!) is about 1.00×104 ?. What voltage does the machine have to apply to the conducting bars to drive a current of 30.0 mA through your body, causing strenuous muscle contraction?