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Which statements correctly describe electromagnetism? Select all that apply. A. An electric force can be attractive or repulsive, but a magnetic force is always attractive. An electric force can be attractive or repulsive, but a magnetic force is always attractive. B. An increase in charge will cause the electric force between two particles to increase. An increase in charge will cause the electric force between two particles to increase. C. An increase in distance between two charges will cause the electric force between them to increase. An increase in distance between two charges will cause the electric force between them to increase. D. If a charge is held at rest in a magnetic field, and then released, it will begin to move perpendicular to the magnetic field. If a charge is held at rest in a magnetic field, and then released, it will begin to move perpendicular to the magnetic field. E. An electric force acts between protons and electrons but not between protons and neutrons. An electric force acts between protons and electrons but not between protons and neutrons.
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People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in contact with their eyes. in a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina.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 2.05cm in front of the eye.)
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Which statements correctly describe electromagnetism? Select all that apply. A. An electric force ca...
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