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 0.700 m and the tension in the cord is 860 N. For related problem-solving tips and strategies, you may want to view a Video Tutor Solution of raising sunken treasure. Part A Calculate the buoyant force exerted by the water on the sphere. Express your answer in newtons. να ΑΣφ ? FR = Submit Request Answer Part B What is the mass of the sphere? Express your answer in kilograms. V AE ? m 3= kg Submit Request Answer Part C The cord breaks and the sphere rises to the surface. When the sphere comes to rest, what fraction of its volume will be submerged?

2c please

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The gravitational force exerted on a solid object is 5.25 N as measured when the object is suspended from a spring scale as in Figure a. When the suspended object is submerged in water, the scale reads 3.80 N (Figure b). Find the density of the object. kg/m³ Scale b TA B Mg T₂

Consider the following section of pipe. The velocity of water (Pwater h₁ m S V₁ = 2.9 h₁ = 3.2 m V₂ = 6.7 h₂ = 1.9 m m S Point 1 = 1000 kg ) and height are given for two different points in the pipe. Use this information to answer the following questions. m What is the ratio of the cross-sectional area at point 1 to the cross-sectional area at point 2? A₁ A₂ What is the difference in pressure between points 1 and 2? (Find P2 - P₁. Include a negative sign if that's what you calculate.) P2 - P1 = Pa Which direction is the water flowing through the pipe? Point 2 h₂

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B and c