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Q. A proton and an electron form two corners of an equilateral triangle with sides of length 3 x 10 -6 m. What is the magnitude of their net electric field at the third corner?

Q. The coefficient of static friction between the m = 3.20 kg crate and the 35.0° incline of the figure below is 0.280. What minimum force must be applied to the crate perpendicular to the incline to prevent the crate from sliding down the incline?

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