Does the system's kinetic energy increase, decrease, or stay the same? or is there not enough information to tell?

Determine the maximum r-value of the polar equation r =3+3 cos 0

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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