94.17: A cork has weightpj ddd 4ez0v+ u/.33kwsvu1vh mg and density 25% of water density. A 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 totally immersed in the water. Expressed in terms of the cork weight m sjh .w1e d/3 dd04+zpvvkuv3ug, the tension in the string is:

  01.20: When submerged underwater, the apparent mass of one cubic centimeter zj w3qkb x78fv 31vdjva 3jo+zk1pd3*of pure gold is 18.3 grams. What woul3d8fj *3b3wpvqx k+j371dzva1vkjzod be its mass in air?

  04.29: Three fishing bobbers all individually float on top of water. Bob1 y )(n (g7/0;rmuzdnk jwvzjdbersA and B have identicd; zjv7ynm )gk01zjwnud (/r( al 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 water?

  01.18: Which of the following is the best stavc jp5(zt;v2+ pzw u5ptement of Pascal's Law?

  05.24: The hydraulic press, which allows large masses to be lifted :opjmm ks5 w 16. -fer5tep+epwith small applied forcwfpt6j-5m pepe rk1emso:.+5 es, is a consequence of which principle?

  06.30: A copper block is connected to a string and submerged in a/ x :uxyymtz(6 container of water. 6um (txyyz/ x:
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 the atmosq4yw.-k8av1;z flrvambzw qb 4m , yf4wj;- s-pheric pressure is 4jb-4 wfmsaqrw-4- l m1fy,ky8q za vbw .;;vz $1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.0e2 +emdaj1f) g kg object floats at rest with 75% of the object submerged in a cubical tanfe)+ea 2dj 1gmk containing $50.0 m^{3}$ of water. What is the buoyant force acting on the object?

  14.26: A solid cube of iron and a solid cube of aluminum have4 wtpe pea2(qf::r- c 2mj3-1gpme kxp equal mass. The cubes areplaced into the same large pool of water so that each is completely submerged and resting on the pool’sbottom. Which object experiences the31 (mp-kr:e 2x:tpa ejmgqcep2 wf p-4 greater buoyant force from the water?

  12.21: A child’s balloon is filled with pure Xenon gas. This 3q-o5 k/xv,br +vwlmhballoon then is released from rest two meters above the ground on Earth. Which one of the following choices best dex l5,vb -q/3rwh vo+mkscribes the response of the balloon?

  16.23: At a party, two spherical balloons are expandv2cvt g cs+d+2ed to have the same radius. Balloon #1 is filled with helium gas while balloon #2 is filled with xenon gas. Which one of the fvg2cs2 +vc+dtollowing statements about the buoyant forces on the balloons is correct?

  03.36: An ideal fluid flows through a long horizontal circular pipmocts8rtml ldstf :un.h v8x5s4-o4:64d+l se. In one region of the pipe, it has radius R. The pipe then widens to radius 2R. What is t +4ct:d8n.lsor6 :ft44u dvllso8s m -hx5mst he ratio of the fluid's speed in the region of 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 section as shx;gjjiz)2bn e.8mlz1 n+wv v;own. In which section would the pressure of the fluid be a min ei blmgz z28;+.v1jxj nw;vn)imum?

  07.35: Two objects labeled K and L have equal mass bvkdlpyr1hb y e o):n.b*0kqg1 x1v8l; ut densities 0.95D0 and D0, reyvod8 kyg0lb).br:pl;1n*h kq1v1x espectively. Each of these objects floats after being thrown into a deep swimming pool. Which is true about the buoyant forces acting on these objects?

  08.16: A block is connected to a h z yf1ul:-sj5light string attached to the bottom of a large container of water. The tensi 1js5-fz :yluhon 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 when a small solid mass hangm .ez 96umb0wf4 4pazbs 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 one of the following choices best represezz f0m b 46ea94upm.wbnts the density of the solid mass(unit: $kg/m^{3}$)?

  09.32: A cube of unknown material and uniform density floats in a conta nybb4yl0z lf/ 7c/;jviner of water with 60% n/c;z7b flb v4yyjl/0 of its volume submerged. If this same cube were placed in a container 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 cylindrically-shaped n8ofd8.y qq oavlbfvs932i((pipe. At the lower end, the pipe’s cross- sectional area is v.(n v39d(2o q yi fbqaf8los8$ 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 ideal fluid is marked as it mecy4;a +zfb6b oves 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 Ie ;f+6babyc4 zI is half of what it was in Region I. What is the speed of the marked fluid when it is in Region II?

  13.25: An ideal fluid completely fillsuk+du / )un tjy*:1reb a small horizontal tube that has a narrowing cross-sectional area as seen in the figure. W ntb:dy juru)/+ku e*1hich one of the following choices best describes what has happened to the fluid’s speed and its associated pressure in the narrower region as compared to the wider region?

  10.47: An open cylindrical container with very lar4v t;n4sb )rmwrn5 u, 0lbohg2aa-.bk ge radius is at rest a dist4s2 b)v0.trwn- 4ga5rho;nbb a kmu,lance 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 distance 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 v3a j5 )cerhvu rfq7mug/29+lcubic block is 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 with a liquid having a densityf ;i3woqcjj ) mtyx(;+ 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 fih+:a zxfqi 3g60p+hrn3jyr8k lled with 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.