Coins were developed as a medium of exchange because other items like cows, grain, and land were more difficult to move from place to place true or false?

True, they used them because its easier to trade coins than products

That's true. Land is especially difficult to move :P. In addition, it's harder to measure the worth of something like a cow. Cows have many variables in their value, such as size, health, nutrition, etc. Establishing a monetary system that uses coins with set values helps to avoid that difficulty.

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.

The answer which is not a detail carson used to describe the pool in the cave at low tide is b.  hundreds of periwinkles browse the branches and roots of the trees.