Which has a greater buoyant force on it: a 25 cm3 piece of wood floating with part of its volume above water or a 25 cm3 piece of submerged iron? Or, must you know their masses before you can answer? Explain.
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Which has a greater buoyant force on it: a 25 cm3 piece of
wood floating with part of its volume above water or a 25 cm3 piece
of submerged iron? Or, must you know their masses before you can
answer? Explain.
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- A 150-N object of density=870kg/m3 floats in a liquid of density with three-fourths of its volume underneath the surface of the fluid. a) What is the buoyant force on the object? b) What is the total volume of the object? c) What is the density of the fluid?A 10-kg piece of aluminum (ρ = 2.70 x 10^3 kg/m^3) sits at the bottom of a pool, right next to a 10-kg piece of lead (ρ = 11.3 x 10^3 kg/m^3). Thinking in terms of their volumes (V), which one must have the greater buoyant force on it? A) the aluminum B) the lead C) Both have the same buoyant force. D) It cannot be determined without knowing their exact volumes.5
- A cube, 0.8 cm on a side, and a mass of 100 g is completely submerged under water (pwater = 1.0 g/cm3= 1000 kg/m3 ) and released. a) What is the density of the cube in g/cm3? b) Draw a free-body diagram for the cube. c) What is the buoyancy force on the cube? d) What is the acceleration of the block after being released under water? (include direction of acceleration in your answer)help A piece of wood floats in water. It measures 49 cm x 12 cm x 11 cm, and has a density of 500 kg/m3. Find the percent of the wood that's underwater, if the density of water is 1000 kg/m3 Hint: Answer should be between 0 and 100 % Buoyancy problem: draw the wood and the forces on it - namely gravity pulling down and the buoyant force of the water pushing up ∑F = 0 the buoyant force = Fb = density of fluid x g x Volume underwater = density of fluid x g x percent * total volume solve for percentBird 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 49.3 g and its apparent mass when submerged is 4.06 g (the bone is watertight). (a) What mass (in g) of water is displaced? (b) What is the volume (in cm3) of the bone? (c) What is its average density (in g/cm3)?
- A scientist is calculating the density of an ore sample. The scien- tist measures that the ore sample weighs 22.4 N in air. When the sample is suspended by a thin light cord and totally immersed in water, the tension in the cord is 14.2 N. What is the density of the ore sample that the scientist calculates. You can assume that any buoyant force from air is negligible.An object hangs from a spring balance. When submerged in water the object weighs one-half what it weighs in air. If, when submerged in an unknown liquid with density px, the object weighs three- fourths what it weighs in air, what is the density of the unknown liquid? OPwater OPwater ○ 2pwater O none of these 3 4Pwater PwaterSuppose a 200-kg block of wood with volume 0.5 m3 is placed in a liquid of density 500 kgm3. What will happen to the block of wood? All of these are possible. It will sink. It will float with no part of it above the surface of liquid. It will be partially submerged.