P2207_fall10_lecture34

P2207_fall10_lecture34 - Lecture 34 Today More on Buoyancy...

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Lecture 34
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Today: More on Buoyancy Fish in unstable equilibrium An in-lecture question most physicist get wrong… Fluid flow
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Two identical bricks are held under water. Brick A is just beneath the surface of the water, while brick B is at a greater depth. The force needed to hold brick B in place is A. larger B. the same as C. smaller than the force required to hold brick A in place. A B
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Two identical glasses are filled to the same level with water. One of the two glasses has ice cubes floating in it. Which weighs more? A. the glass without ice cubes B. the glass with ice cubes C. both weigh the same
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A boat carrying a boulder is floating on a lake. The boulder is thrown overboard and sinks . The water level in the lake (with respect to the shore): A. rises B. drops C. stays the same D. not enough info
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Buoyancy and Fish Fish adjust their density fish so that fish = water and F B =W fish ("neutrally buoyant"). How?
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This note was uploaded on 12/18/2011 for the course PHYS 2207 at Cornell.

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P2207_fall10_lecture34 - Lecture 34 Today More on Buoyancy...

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