•what will happen if you scratch something softer with the quartz?

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• what will happen if you scratch something harder with the quartz?

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i really need fast if you can answer the questions right you will get 10 points

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.

Iwould have to say sorry i can't elaborate more. hope this though!

It is the areas with lines. this may sound a little confusing, but i hope it !