A lead block of volume 0.16 m3 is suspended from a spring scale and immersed in a flask of water. Then the lead block is removed, and an aluminum block of the same volume replaces it. (a) In which case is the buoyant force the greatest, for the lead block or the aluminum block? lead block aluminum block the buoyant force is the same for each (b) In which case does the spring scale read the largest value? lead block aluminum block the scale reading is the same for each (c) Use the known densities of these materials to calculate the quantities requested in parts (a) and (b). Compare your calculations (for consistency) with your previous answers to parts (a) and (b). (The density of lead is 1.13 ✕ 104 kg/m3 and the density of aluminum is 2.70 ✕ 103 kg/m3.) Material Buoyant force Scale reading lead N N aluminum N N

A lead block of volume 0.16 m3 is suspended from a spring scale and immersed in a flask of water. Then the lead block is removed, and an aluminum block of the same volume replaces it. (a) In which case is the buoyant force the greatest, for the lead block or the aluminum block? lead block aluminum block the buoyant force is the same for each (b) In which case does the spring scale read the largest value? lead block aluminum block the scale reading is the same for each (c) Use the known densities of these materials to calculate the quantities requested in parts (a) and (b). Compare your calculations (for consistency) with your previous answers to parts (a) and (b). (The density of lead is 1.13 ✕ 104 kg/m3 and the density of aluminum is 2.70 ✕ 103 kg/m3.) Material Buoyant force Scale reading lead N N aluminum N N

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A solid iron sphere and a solid lead sphere of the same size are each suspended by strings and are submerged in a tank of water. (Note that the density of lead is greater than that of iron.) Which of the following statements are valid? (Choose all correct statements.) (a) The buoyant force on each is the same. (b) The buoyant force on the lead sphere is greater than the buoyant force on the iron sphere because lead has the greater density. (c) The tension in the string supporting the lead sphere is greater than the tension in the string supporting the iron sphere. (d) The buoyant force on the iron sphere is greater than the buoyant force on the lead sphere because lead displaces more water. (e) None of those statements is true.
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Bird bones have air pockets in them to reduce their weight. This also gives them an average density significantly less than that of the bones of other animals. Suppose an ornithologist weighs a bird bone in air and in water and finds its mass is 43.0 g and its apparent mass when submerged is 3.60 g (the bone is watertight). What mass of water is displaced?
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