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1) You have been given 2.2019195 g of copper from which you are to fashion a wire whose resistance is 1.7423174 ohms. The density of copper is 8900 kg/m3 and the resisitivity of copper is 1.7 x 10 -8 ohm m. What will the diameter of the wire be that you fashion?

2) A 5 cm spring is suspended with a mass of 1.1476 g attached to it which extends the spring by 3.4207 cm. The same spring is placed on a frictionless flat surface and charged beads are attached to each end of the spring. With the charged beads attached to the spring, the spring's extension is 0.0099 m. What are the charges of the beads?

3) A charge of 2.21 nC is moved from a position on the y axis of 6.583 cm to a position on the x axis of 1.72 cm while there is a charge 22.442 located at the origin. How much work in micro-Joules did it take to move the charge?

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