)object clearly at a distance of 30 cm with eyeglasses power of +2.5 diopters. determine the focal length of the lenses of the eyeglasses. find the person's near point without wearing the eyeglasses. you can neglect the distance from the lenses to the eyes. 1. a person can see an that have a (6 marks) m due to the point charges determine the net electric field at the point (3,3) q10 hc located at (2,4) m, qa = 5 uc located at (-1,-6) m and q,=-8 c located at (-3,5) m. (b)

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Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Your physics assignment is to figure out a way to use electricity to launch a small 6.0-cm-long plastic drink stirrer. you decide that you'll charge the little plastic rod by rubbing it with fur, then hold it near a long, charged wire, as shown in figure p23.56 . when you let go, the electric force of the wire on the plastic rod will shoot it away. suppose you can uniformly charge the plastic stirrer to 10 nc and that the linear charge density of the long wire is 1.0 x10-7 c/m. what is the net electric force on the plastic stirrer if the end closest to the wire is 2.0 cm away?