Which of the following is the independent variable in this experiment? (Velocity) A. The distance the ball travels
B. The mass of the ball C. The time it takes the ball to travel
D. The average velocity of the ball

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell