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Q. A charge of +3.5 microC is placed on the x axis at x = +0.55 m, while a charge of -15 microC is placed at the origin. Calculate the magnitude and direction of the net electric field on the x-axis at x = +0.8 m.

Q. If a car averages 44 when driving 93 , which requires 30 , what is the efficiency of the engine under those conditions?

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