A pair of charged conducting plates produces a uniform electric field of 9,000 N/C, directed from plate A toward plate B, between the plates. The separation of the plates is 50 mm. An electron is projected from plate A, directly toward plate B, with an initial speed of v0 = 1.6 × 10^7 m/s, as shown. What is the speed of the electron when it strikes plate B? (e = 1.60*10^-19; mass electron = 9.11*10^-31)

Need people build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment. (5 points) worth 20 points

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

How much energy must a refrigerator absorb from 225 g of water so that the temperature of the water will drop from 35°c to 5°c