Would a cell with two copper electrodes in a salt water electrode produce voltage?

Yes, a cell with two copper electrodes in salt water can produce voltage due to the electrochemical reactions occurring at the electrodes. The salt water acts as an electrolyte, allowing ions to move and facilitating the flow of electric current. The difference in electrode potential between the two copper electrodes can generate a voltage, but the output may be relatively low compared to other types of electrochemical cells. The effectiveness of this setup depends on factors like the concentration of salt and the surface area of the electrodes.