What’s the formula for potential energy

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

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

What happens when a rubber rod is rubbed with a piece of fur?