Which two statements describe how ultrasound technology produces an image of a baby before it is born? A. An image is created based on the frequency of reflected X-rays.

B. Body tissues absorb high-frequency sound waves, producing an image.

C. An image is created based on the amount of time it takes for a sound wave to return.

D. Tissues in the baby's body reflect high-frequency sound waves.

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.