Two boxes hit together and stick in a perfectly inelastic collision. If the first box had a mass of 7kg and was going 2 m/s and the second box was 5kg and going -8m/s, what was their combined velocity after the collision?

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