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Physics 131 Test 3 Mastering Physics

# Physics 131 Test 3 Mastering Physics - Chapter 13...

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Chapter 13 Archimede’s Principle -The magnitude of the buoyant force is equal to the weight of fluid displaced by the object for every object submerged partially or completely in a fluid -The magnitude of the buoyant force is equal to the weight of the amount of fluid that has the same volume as the object for an object that sinks -The magnitude of the buoyant force equals the weight of the object for an object that floats -The magnitude of the buoyant force is less than the weight of the object for an object that sinks - An object is floating in equilibrium on the surface of a liquid. The object is removed and placed in another container, filled with a denser liquid. The object would float submerged less deeply than in the first container - If the fluid in the second container is less dense than the object, then the object will sink all the way to the bottom . If the fluid in the second container is denser than the object (though less dense than the fluid in the original container), the object will still float, but its depth will be greate r than it was in the original container. - Less of object T is submerged than of object B, which floats, fully submerged, closer to the bottom of the container. Object B has a greater density than object T. Does it float or sink? Ice at 0.0 has a density of 917kg/m 3 . A 3.00cm 3 ice cube is gently released inside a small container filled with oil and is observed to be neutrally buoyant. What is the density of the oil? Density of oil= 917kg/m 3 Once the ice cube melts, the liquid water that it produces sinks to the bottom of the container What happens if some ethyl alcohol of density 790kg/m 3 is poured into the container after the ice cube has melted? The layer of ethyl alcohol forms on the surface. Buoyant Ping Pall Ball A Ping-Pong ball is held submerged in a bucket of water by a string attached to the bucket's bottom. Salt is now added to the water in the bucket, increasing the density of the liquid. There is an increase in tension in the string. What happens to the tension in the string if the Ping-Pong ball is replaced by a smaller spherical object of equal weight? Tension decreases. Chapters 14+15 Mass QuickTimeW and a decompressor are needed to see this picture.

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Physics 131 Test 3 Mastering Physics - Chapter 13...

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