A camera lens used for taking close-up photographs has a focal length of 23.7 mm. The farthest it can be placed from the film is 33.1 mm. a. What is the closest object that can be photographed

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 fertilized egg  begins to develop into a hollow ball of cells called the blastocyst.