Aslide is held in front of a projector, at a distance d= 74.8 cm from the screen where one can see the slide image. the image is focused on the screen by a thin lens of focal length f = 18.7 cm. a) draw a diagram showing the lens, the optical axis, the two principal rays going through the first and second focal points, and the image. b) at what distance from the slide should the lens be placed? c) is the image erect or inverted? what is the lateral magnification in this case?

Hello how was your day? ? i hope it was good

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.