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Two identical small metal spheres are separated by 1.00 x 10^5 m and exert an 18.9 N repulsive force on each other. a wire is connected between the spheres and then removed. the spheres now repel each other, exerting 22.5 N force. assume both charges are positive.
a) determine the total charge of this system
b) determine the charges of the spheres before the connection
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When a 5.5 cm long pencil is arranged perpendicular to a convex mirror's optical axis at a distance of 29 cm from the mirror, its image is 2.8 cm tall. (a) What is the mirror's focal length? (b) How tall is the pencil's image if the pencil is move..
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A hunter aims directly at a target (on the same level) 140 m away.
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A 40 percent efficient electric power plant produces 900MW of electric power and discharges waste heat into 30 C ocean water. Suppose the waste heat could be used to heat homes during the winter instead of being discharged into the ocean. A typical A..
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