94.17: A cork has weight mg and density 259t2qwyjvq ) 0i% 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 mg, the tension in the string is: wq y0 v9ji)2tq

  01.20: When submerged underwater, the apparent mass of one c sa;8qoymvdkhw zy/ x65w8j1 etv+2xe2en71pubic centimeter of pure goa/ ne218we 86x od ehvwyvkqy1pts 2+xjmz5 ;7ld is 18.3 grams. What would be its mass in air?

  04.29: Three fishing bobbern hf*xav /owrkt8l.lu(bi (63s all individually float on top of water. BobbersA and B have identical masses and densities but different shapes while bobbers B and C hfuobn xw.(68vr h /k3(ltl*a iave 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 x;5 u ue/z*wm0xp+ tjbsy4nx3 is the best statement of Pascal's Law?

  05.24: The hydraulic press, which allows large masses to bpze:f +5fu) s8pn qtrhl+v+ch 33xh/ fe lifted with small applied forces, is a consequence of which pr8+ u fzvls5/nc 3tf):fhhp r++hq p3xeinciple?

  06.30: A copper block is connect7cyz+us4t 2m: qf fas;.kigzx0 5zn, fed to a string and submerged in a container of water0 +5icxztzfgzyu 4:m qs,2ffa; kns.7.
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 m2 /tnp.9sides long and 5.0 m wide. If the atmospheric pressure is d./n t2epssi9 $1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.q:crx p(1:d up0 kg object floats at rest with 75% of the object submerged in a cubical tank conqd:1 uxcrp :(ptaining $50.0 m^{3}$ of water. What is the buoyant force acting on the object?

  14.26: A solid cube of iron and a solq:o0i c qtrb)j840 bh,c66s/nkv qqlsid cube of aluminum have equal mass. The cubes areplaced into the same large pool of water so that each is completely submerged and resting on thel 6c80 64/kqbs:qn0ci , rjshqoq)bvt pool’sbottom. Which object experiences the greater buoyant force from the water?

  12.21: A child’s balloon is filled with;j z;+byx/s;y)o d 8 evlkmp4 s4z0dec pure Xenon gas. This balloon then is released from rest two me8kpv0;exb4so/zd;dy)yj; c+s lm z e4ters above the ground on Earth. Which one of the following choices best describes the response of the balloon?

  16.23: At a party, two spherical balloons are expanded to hav0uhwv 3byz(7zv8x 7y v:cpuk2 e the same radius. Balloon #1 is filled with helium gas while balloon #2 is filled with xenon gas. Which one of the following statements aboutxk bu3vz:uvy8yc 72wv 0z 7(ph the buoyant forces on the balloons is correct?

  03.36: An ideal fluid flows through a long horizontal circularyt8rw02evq* zsyk g )88o sp6m 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'ksgpw0o8t*8 rmsye6q8 y v )2zs speed in the region of radius R to the speed of the fluid in region with radius 2R?

  04.24: A fluid is forceot7* 7j+tdm/e/ zc1a pzolil-d through a pipe of changing cross section as shown. In which section would the press/za doli+t /lj-z1 om*p7ce7t ure of the fluid be a minimum?

  07.35: Two objects labeled K and L have equal mby2d5/vns y ql xh9i98ass but densities 0.95D0 and D0, re8n5/2lv xdi bq9s 9yyhspectively. 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 light string attached to the bottom of a larg1 *bi+bp7ij s5c- glaue container of water. The tension incg*j-1bai u 5+ip bl7s 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 2.5jxr2yh imh i67 h*5ec-0N when 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 complh65c-ix7 2mr ihehjy* etely submerged in a container of water. Which one 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 density floats in a container of xt7mw-mf.jdcm5 3i w-water with 60% of its volume submerged. If this same cube were placed in a container of oil wimf mwcd7mx-w5. it3-j th 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 pipe. Aajvh, wnq 2z;b8a0.i3xb-i pnt the lower end, the pipe’s cross- sectional areaj-3vih20ni .xabnzp, bqa;w8 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 ideal flums4;p o+nmyf7d 25ot5w7c isfid 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 half4mdw t; n75ssofmf5y 27+ci po 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 fills a small horizontal tube that has a w90hxaz(h + tmnarrowing cross-sectional area as seen in the figure. Which one of the following choices best describes what has happened to the fluid’s speed and its associated pressure in the 90hxa m(+z wthnarrower region as compared to the wider region?

  10.47: An open cylindrical container with very large+ta i/aq)aq**k)s;qgjx 2 y rr 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 distance H from the edge of the ps;ra+j/))* grtqay a2q k*xqilatform. 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 is o5nr(k 8 x/cwqkdas/p :3dtu,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 haviguphxqyq6;j*c cklq:86h7 w ; ng 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 mercur l /kb /t,e.1adwbi4;nys ldq4y (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.