Learn about the physics of resistance in a wire. Change its resistivity, length, and area to see how they affect the wire's resistance. Predict how changing each variable will affect the resistance.
I just purchased crackle subway tile (3x6) for our backsplash. As I was shopping around it seemed that $12-15 per square foot was the average price. You can get cheaper but they were VERY basic. I ended up with a Sonoma tile which was hand molded and cost $20 square foot.
Additional costs: Endcaps that match the color of the laminate and seal the raw particle board edges of a laminate counter are not include with countertop sections, and cost about $15. Endsplashes that include a cap for the backsplash cost around $21, and are sold at retailers that sell laminate countertops.