Compute algebraically the resultant of the following coplanar forces: 130N at 35°, 140 N at 45°, 120 N at 250° and 100N at 320° The average diameter of the earth is 13462 km. Find the area of the surface of the earth in miles and m?. Find the volume of the earth in liters and gallons . If the mass of the earth is 5.97 x 1024 kg, find the average density of the earth in kg/m².

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