# Capitulo 14 serway 7ma edicion

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c14
Fluid Mechanics
CHAPTER OUTLINE
14.1 14.2 14.3 14.4 14.5 14.6 14.7 Pressure Variation of Pressure with Depth Pressure Measurements Buoyant Forces and Archimedes’s Principle Fluid Dynamics Bernoulli’s Equation Other Applications of Fluid Dynamics

*Q14.1 Answer (c). Both must be built the same. The force on the back of each dam is the average pressure of the watertimes the area of the dam. If both reservoirs are equally deep, the force is the same.

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Chapter 14

*Q14.7 Answer (b). The apple does not change volume appreciably in a dunking bucket, and thewater also keeps constant density. Then the buoyant force is constant at all depths. Q14.8 The horizontal force exerted by the outside f luid, on an area element of the object’s side wall, has equal magnitude and opposite direction to the horizontal force the f luid exerts on another element diametrically opposite the f irst. No. The somewhat lighter barge will f loat higher in the water.

Q14.9Q14.10 The metal is more dense than water. If the metal is sufficiently thin, it can float like a ship, with the lip of the dish above the water line. Most of the volume below the water line is f illed with air. The mass of the dish divided by the volume of the part below the water line is just equal to the density of water. Placing a bar of soap into this space to replace the air raises theaverage density of the compound object and the density can become greater than that of water. The dish sinks with its cargo. *Q14.11 Answer (c). The water keeps nearly constant density as it increases in pressure with depth. The beach ball is compressed to smaller volume as you take it deeper, so the buoyant force decreases. Q14.12 Like the ball, the balloon will remain in front of you. It will not...