1. How can an aircraft carrier (or a concrete canoe) float when the density of t
ID: 1775647 • Letter: 1
Question
1. How can an aircraft carrier (or a concrete canoe) float when the density of the material used to build it is greater than the density of water? 2. Does air create a buoyant force? If so, estimate the magnitudes of the buoyant forces due to the atmosphere on your wood and aluminum cylinders? 3. Is the direction of the buoyant force always opposite the direction of the gravitational force? 4. Does the buoyant force on a totally submerged object change as the object moves farther and farther below the surface of the fluid?Explanation / Answer
Problem 1)
Because of buoyancy. A needle cannot stay afloat bcause the mass of water removed by it is lesser than the mass of needle itself. But the volume if a ship is much bigger, so the mass of water removed by it is greater than that of ship. The removed water creats an upward force on the object immersed in a fluid, which has to be greater that the weight of the object itself to make it float. In this case this it is greater in ship made of iron. That is why the bottom part of a ship is wide.
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