Materials and Equipment
Vinegar (any kind, 1/4 C.)
Salt (1 Tbsp.)
Small bowl or glass
Pennies (4)
Nickels (4)
Dish soap
Aluminum foil (small strip)
Scissors
Paper towels (2)
Small plate (ceramic, plastic, or StyrofoamTM; not paper or metal)
Digital multimeter (any kind that reads mA and mV), available from suppliers like Jameco Electronics and Amazon
Lab notebook