Final answer:
The potential difference (delta V) between two parallel metal plates with an electric field of 350 V/m and a distance of 3.0 mm is 1.05 V.
Step-by-step explanation:
To calculate the potential difference (delta V) between two parallel metal plates, we can use the formula delta V = E * d, where E is the electric field strength and d is the distance between the plates. In this case, the electric field strength is given as 350 V/m and the distance between the plates is 3.0 mm (which is equal to 0.003 m). Therefore, the potential difference delta V = 350 V/m * 0.003 m = 1.05 V.