A waiter walks a distance of 5m holding a tray of food that weighs 10N. How much work has the waiter done on the tray?

Asimply means that over time there was some sort of change.

The combining of light nuclei is called blank. blank as in not actually blank. you know what im tryin to say.

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