If a small machine does 2500 joules of work on an object to move it a distance of 100 meters in 10 seconds, what is the force needed to do the work? what is the power of the machine doing the work?

Write the correct abbreviation for each metric unit

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

The energy equivalent of the rest mass of an electron is