Test Bank Physics Principles with Applications -7th Edition-Giancoli Chapter 6 Sample Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)Substance A has a density of 3 g/cm3 and substance B has a density of 4 g/cm3. In order to obtain1) equal masses of these two substances, what must be the ratio of the volume of A to the volume of B? A) V A3B) V A 3C) V A 1D) V A 4E) V A 3 = = = = = V B V B V B V B V B 4 1 3 3 4 2)A hollow sphere of negligible mass and radius R is completely filled with a liquid so that its 2) density is ? . You now enlarge the sphere so its radius is 2 R and completely fill it with the same liquid. What is the density of the enlarged sphere? A) 8 ? B) ? C) ? /2 D) ? /8 E) 4 ? 3)A styrofoam sphere of radius R has a density ? . You now carefully compress the sphere so its3) radius is R /2. What is the density of the compressed sphere? A) 4 ? B) ? 8 C) 8 ? D) ? 2 E) 2 ? 4)When a box rests on a round sheet of wood on the ground, it exerts an average pressure p on the4) wood. If the wood is replaced by a sheet that has half the diameter of the original piece, what is the new average pressure? A) p 2 B) p /2 C) 2 p D) 4 p E) p /4 5)When a heavy metal block is supported by a cylindrical vertical post of radius R , it exerts a force F 5) on the post. If the diameter of the post is increased to 2 R , what force does the block now exert on the post? A) F /2 B) 2 F C) F /4 D) F /2 E) F 6)As shown in the figure, fluid fills a container having several sections. At which of the indicated6) points is the pressure greatest? AC B D The pressure is the same at each of the labeled points. 1 7)Consider a brick that is totally immersed in water, with the long edge of the brick vertical. The7) pressure on the brick is A) greatest on the face with largest area. B) greatest on the top of the brick. C) greatest on the bottom of the brick. D) greatest on the sides of the brick. E) the same on all surfaces of the brick. 8)An air bubble underwater has the same pressure as that of the surrounding water. As the air8) bubble rises toward the surface (and its temperature remains constant), the volume of the air bubble A) increases. B) remains constant. C) decreases. D) increases or decreases, depending on the rate it rises. SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. 9) A cubical block of stone is lowered at a steady rate into the ocean by a crane, always9) keeping the top and bottom faces horizontal. Which one of the following graphs best describes the gauge pressure p on the bottom of this block as a function of time t if the block just enters the water at time t = 0 s? 2 10) A cubical block of stone is lowered at a steady rate into the ocean by a crane, always10) keeping the top and bottom faces horizontal. Which one of the following graphs best describes the absolute (total) pressure p on the bottom of this block as a function of time t if the block just enters the water at time t = 0 s? MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 11) If atmospheric pressure increases by an amount p , which of the following statements about the11)pressure in a lake is true? (There could be more than one correct choice.) A) The absolute (total) pressure increases, but by an amount less than p . B) The gauge pressure does not change. C) The gauge pressure increases by p . D) The absolute (total) pressure increases by p . E) The absolute (total) pressure does not change. 12) A closed cubical chamber resting on the floor contains oil and a piston. If you push down on the12)piston hard enough to increase the pressure just below the piston by an amount p , which of the following statements is correct? (There co…
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