Two soccer players start from rest, 38 m apart. They run directly toward each other, both players accelerating. The first player’s acceleration has a magnitude of 0.42 m/s^2. The second player’s acceleration has a magnitude of 0.42 m/s^2. (a) How much time passes before the players collide? (b) At the instant they collide, how far has the first player run?

The answer is  a.first and third quarters 

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.

It really doesn't matter for any of the questions that you've listed.

The correct answer is antinodes