94.17: A cork has weight mg and density 25% of water density. exub/kv6zdxnj2b.71p ,l7pc1 ra +y zA string is tied around the cork and attached to the bottom of a water-filled container. As shown in the accompanying figure, the cork is totallyjryx1 c+ u/77nlb1zbzv ,p.ap2 dkx 6e immersed in the water. Expressed in terms of the cork weight mg, the tension in the string is:

  01.20: When submerged underwater, the apparent mass of one cubic centimetera u.egse,5 fj/ of pure gold i, eesgj ./ua5fs 18.3 grams. What would be its mass in air?

  04.29: Three fishing bobbe06wu*b3h :pro2 dyb vwrs all individually float on top of water. BobbersA and B have identical masses and densities but different shapes while bobbers B and C have identical sizes and shapes but bobber C has less mass and density than B. If three identical weights are then tied to the bobbers and all three are pulled completely beneath the surface of the water, which bobber will displace the greatest volume of wate2b*pw3: brvywu 0h6o dr?

  01.18: Which of the drn*4b5 4 dskofollowing is the best statement of Pascal's Law?

  05.24: The hydraulic press, which allows large l4gy :1cusx8vjm0 8gm0 pqs8*8vgczv masses to be lifted with small applied forces, is a cons x04s8umlc81:vj0gpvs qvyg mc*8gz 8equence of which principle?

  06.30: A copper block isp8eftf0; vk):vqffue; j x6vkif;*l9 connected to a string and submerged in a container of w jffp8lvu6:*qeff;0xvv9 k fkiet) ; ;ater.
Position 1: The copper is completely submerged, but just under the surface of the water.
Position 2: The copper is completely submerged, mid-way between the water surface and the bottom of the container.
Position 3: The copper is completely submerged, but just above the bottom surface of the container. Assume that the water is incompressible. What is the ranking of the buoyant forces (B) acting on the copper blocks for these positions, from least to greater?

  07.36: A driveway is 22.0 m long and 5.0 m wide. If xp8;eq29m29ohifg aqq5esa (the atmospheric pressure is 9ia(ea2m x e5qp;q hq 289gfos $1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform hnrbfu0 p0 (b;10.0 kg object floats at rest with 75% of the object nuhf p00 bbr;(submerged in a cubical tank containing $50.0 m^{3}$ of water. What is the buoyant force acting on the object?

  14.26: A solid cube of iron and ilu+(*zz*cn ga solid cube of aluminum have equal mass. The cubes areplaced into the same large pool of water so that each is completeuz* +*ngclz( ily submerged and resting on the pool’sbottom. Which object experiences the greater buoyant force from the water?

  12.21: A child’s balloon is filled with pure Xenon gas. Th x9,:,zr 5vn3pq6grrg qz0scjis balloon then is released from rest two meters above the ground on Earth. Which one of the following choices best describes the zz653jcv 0g,,q rprs9rxgnq :response of the balloon?

  16.23: At a party, two spherical balloons a82tr5c ls,ze .yh-denre expanded to have the same radius. Balloon #1 is filled with helium gas while ballool2hc,8e5sd.re nyzt-n #2 is filled with xenon gas. Which one of the following statements about the buoyant forces on the balloons is correct?

  03.36: An ideal fluid flows thg :fco+;ja wf u3t abh*pn45u*rough a long horizontal circular pipe. In one region of the pipe, it has radius R. The pipe then widens to radius 2R. What is the ratio of the fluid's speed in the region of5a;: uwhbucof3n +ap*g*t4fj radius R to the speed of the fluid in region with radius 2R?

  04.24: A fluid is forced through a pipe of changing cross /.r +i uf/v-zug .4tddvpb.8u oj8 z,e1m hjrgsection as shown. In which section would the pressure of the .hu4,m.8fvv d- de8/.gio/ u r1g+zjbpr utjzfluid be a minimum?

  07.35: Two objects labeled K and L have equal mass but densities ne e0dwq1d 1p30.95D0 and D0, respectively. Each of these objects floats after bdq1 e1wp03deneing thrown into a deep swimming pool. Which is true about the buoyant forces acting on these objects?

  08.16: A block is connectk.m e**aoiz ; a7-wdwyed to a light string attached to the bottom of a large container of wzawo a.* iy7de*;k m-water. The tension in the string is 3.0 N. The gravitational force from the earth on the block is 5.0N. What is the block’svolume?

  15.30: A spring scale reads 2.50N whezzj (2 n1jhi/wn a small solid mass hangs from it in air. The spring scale reads 1.58N when the mass at the end of the spring is completely submerged in a container of water. Which on jz( 2/j1zhwine of the following choices best represents the density of the solid mass(unit: $kg/m^{3}$)?

  09.32: A cube of unknown material and uniform dh8riprn,f5kbk b*) ) jensity floats in a container of water with 60% of its volume submerged. If this same cube were placed in a cn*))8,pbi kr jk5hbfr ontainer of oil with density$ρ=800 kg/m^{3}$ , what portion of the cube’s volume would be submerged while floating?

  12.47: Water flows ideally through a cyli3 vyqq vp68+ifndrically-shaped pipe. At the lower end, the +6qypq v f3v8ipipe’s cross- sectional area is $ 30.0 cm^{2}$ whereas in the upper portion, the pipe’s cross-sectional area is $10.0cm^{2}$ and fluid is moving at 9.0 m/s. Which one of the following choices best represents the difference in pressure between the lower section of the pipe and the upper section if the vertical distance between the centers of the pipe sections is 2.0 m ?

  09.35: A piece of an *e5ybq u+i;iryeo- s06zmcu 9ideal fluid is marked as it moves along a horizontal streamline through a pipe, as shown in the figure. In Region I, the speed of the fluid on the streamline is V. The cylindrical, horizontal pipe narrows so that the radius of the pipe in Region II is half of what it was in Region I. What is the speed of the ma+oemsi *buc0iy5 y69-rzuqe;rked fluid when it is in Region II?

  13.25: An ideal fluid complete59v vgp-sj(q aly fills a small horizontal tube that has a narrowing cross-sectional area as seen in the figure. Which one of the following choices best describes what has happened to the fluid’s v5vsg q9(-pajspeed and its associated pressure in the narrower region as compared to the wider region?

  10.47: An open cylindrical contaix)ty/u ie99vmwx k2p .ner with very large radius is at rest a distance H above the ground at the edge of a platform. A tiny hole develops at the bottom of the container and water from the container squirts out horizontally landing a distp k 9xwtue9im2)./xv yance H from the edge of the platform. For the
water to land at this location, what is the depth of the water L in the container? The figure is not drawn to scale and air resistance is ignored.

  11.27: The density of a solid cubic block ;3yb.aaqzjp l q8e,)fis given as $ρ=0.750 g/cm^{3}$ . This block is dropped into a large swimming pool filled with water. When equilibrium is established and all motion stops, which choice best describes the location of the block? The block is very small in comparison to the pool.

  17.22: A large swimming pool is filled withj j3l yes(v,p .bfl)9j a liquid having a density of $500kg/m^{3}$ . Aperson wants to see what happens if she jumps into the deep end of the pool (3.0 meters deep). Which one of the following choices correctly identifies what will happen to the person? Assume that the person does not try to move their arms or legs until discovering what happens after equilibrium is established.

  13.50: AU-tube is filled with(g msl lm.( e*kofv2h9 mercury (density $13.6g/cm^{3}$) as shown in the left-most figure. Water of mass 800 grams is added to the left-hand side of the tube. When equilibrium is re-established, the tube appears as shown in the right-most figure. The cross-sectional area of the left tube is$ 6.5 cm^{2}$ while the right tube has cross-sectional area $15.0 cm^{2}$. Which one of the following choices best represents the height above the original equilibrium that the mercury rises in the right tube? The drawings are not to scale.