VOLT-A unit of electrical pressure (or electromotive force) which causes current to flow in a circuit. One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance. VOLTAGE-That force which is generated to cause current to flow in an electrical circuit.
1 (A cubic yard of gravel is 3'x3'x3' and weighs roughly 1.2 to 1.7 tons or more). 2  A 12'x25' single-car driveway 9 thick requires an estimated 10-14 tons, which can cost $100 -$850. 3  A 14'x100' driveway 6 thick requires about 26 tons of gravel, or $260 -$1,560 for just the stones.
The cost of gravel is generally $0.79 per square foot. Calculate the amount of gravel that will be needed and then contact local quarries for pricing. Remember to add in the delivery fees for the gravel. The cost of a concrete slab will vary depending upon the size of the slab as well as the thickness.he cost of gravel is generally $0.79 per square foot. Calculate the amount of gravel that will be needed and then contact local quarries for pricing. Remember to add in the delivery fees for the gravel. The cost of a concrete slab will vary depending upon the size of the slab as well as the thickness.