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A long thin rod lies along the x-axis. One end is at x=2.00 m and the other at x=4.00 m. Its linear mass density ? =0.400 x2+0.600, in kg/m.
a) Calculate mass of the rod.
b) Calculate the x-coordinate of the CM of the rod.
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Four charges are placed at the vertices of a square, centered at the origin. If each side of the square has a length of 0.224 m, what is the strength and direction of net electric field at the origin? Express your answer in terms of the charge ma..
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