1 An electric current is the overall movement of charged particles in one direction. 2  To obtain an electric current, there needs to be a continuous circuit from one terminal of a battery to the other. 3  An electric current in a circuit transfers energy from the battery to the circuit components.
A pea gravel walkway or patio costs about $5 per square foot, installed, including a layer of base rock. If you'd like to install it yourself, it will cost half as much.Add in the cost of a header or Bender Board. A wood header is about $5 per linear foot; a metal header is $6 (black metal disappears well).You won't need a header if you're installing gravel against a house, fence, or raised bed.dd in the cost of a header or Bender Board. A wood header is about $5 per linear foot; a metal header is $6 (black metal disappears well). You won't need a header if you're installing gravel against a house, fence, or raised bed.
Slide 1: Gravel Walkway. Amazing Decoration. Add some visual interest and practical purpose to a sloped garden landscape by creating a gavel-stepped walkway. Pea gravel and new or salvaged wood beams are all that you will need to create one like this.Simply level out the grade, or create steps with the beams and fill in with gravel.lide 1: Gravel Walkway. Amazing Decoration. Add some visual interest and practical purpose to a sloped garden landscape by creating a gavel-stepped walkway. Pea gravel and new or salvaged wood beams are all that you will need to create one like this.