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Four 7.5-kgkg spheres are located at the corners of a square of side 0.55 mm. Calculate...

Four 7.5-kgkg spheres are located at the corners of a square of side 0.55 mm.

Calculate the magnitude of the gravitational force exerted on one sphere by the other three.

Express your answer to two significant figures and include the appropriate units.

F= ????? N

Calculate the direction of the gravitational force exerted on one sphere by the other three.

Express your answer to two significant figures and include the appropriate units.

θ= ????

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