Noise cancelling headphones eliminate outside noise by combining the original sound wave with a wave produced when the original sound wave is inverted. Explain how this cancels out the wave. You must use the terms interference and superposition your response.

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.

To find speed, or mph, use distance/time.

Ihad this on a test i just recently took on edgenuity and got 100%! the answer is b. no acceleration.