What is the potential energy of a 2 kg rock resting at the top of a 10-meter high cliff? PEg= mgh

PEg= gravitational potential energy (energy due to position- Joules)

m= mass (kg)

h= height (m)

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