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OpenStudy (anonymous):
A hollow, plastic sphere is held below the surface of a freshwater lake by a cord anchored to the bottom of the lake. The sphere has a volume of 0.660m3 and the tension in the cord is 780N . 1. Calculate the buoyant force exerted by the water on the sphere. 2. What is the mass of the sphere? 3. The cord breaks and the sphere rises to the surface. When the sphere comes to rest, what fraction of its volume will be submerged?
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