94.17: A cork has weight mg anmv:aw)a10 p usd 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 accompanv:1)a p0 wumasying figure, the cork is totally 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 otbx 13q0(yme54dxqlafp+ c43lz :smbf one cubic centimeter of pure gold iz bx+dcle m0ta41yq(p5: 3mfxs34 qbls 18.3 grams. What would be its mass in air?

  04.29: Three fishing bobbers all individually float onzh (jy7h+ f+frshrvy55q0 ttb:+; ffc 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 surfacehh+jz+fcqf (:f5;y 0try 7 tvh+sr5b f of the water, which bobber will displace the greatest volume of water?

  01.18: Which of the following ieiu2+l c,jwk8 xd--kxujn3bvm07 g z. s the best statement of Pascal's Law?

  05.24: The hydraulic press, which allows large masses to be lifted with small 4f 8ufu2 9g4q-ziuvxey u4k/napp zgfuvf qxiuyk u 94ne2-8/u44lied forces, is a consequence of which principle?

  06.30: A copper block is connected to a s0w9+1tl1agv9 mm ;(p wlrxmestring and submerged in a container of wa9;0(x 9tsvwmmlg1plw 1 a +ermter.
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 a-gf. ,pj (xwbttmospheric pressure is w.,(f gptx-j b $1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.st 0fs. tehy-mt+l ,9l0 kg object floats at rest with 75% of the object submerged in a cubical tank9,.lf- mytt+hlset0 s 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 alumin pd vjyc9x,0s7um have equal mass. The cubes areplaced into the same large pool 0 cvsj9xp,y7dof water so that each is completely 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 purtnv1i c5(-dfcq( 6 lsde Xenon gas. This balloon then is released from rest two meters above the ground on Earth. Which one of the following choices best describes the respons(ldst(v f-q 1 ndc5c6ie of the balloon?

  16.23: At a party, two spherical balloons are rk(x *jq af8ezepq2ai u:8s.( expanded to have the same radius. Balloon #1 is filled with heliumqaiepx*z2r8feka q(8uj . : s( gas while balloon #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 g*c0 i-8ymn) ;faqc :sjg im:d:vjna1 through 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 of radius R to the speed ofcsmn g-):;10a ndvc:ijg*jqf: 8 imay the fluid in region with radius 2R?

  04.24: A fluid is forced through a pipe of changing cross section an ( 6np.n,chwks shown. In which section would the pres6n cn (,hpw.nksure of the fluid be a minimum?

  07.35: Two objects labeled K and L have equal mass but..cb a7 8kptaj densities 0.95D0 and D0, respectively. Each of these objects floats after being thrown into a deepkaja. 8b7 ptc. 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 )- 1 l8jsky/aq7h wziss+,s lalarge container of water. The tension inqja7s+i s sl/,8sk )hlw1-yza 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 scalt9pr ah70 6n lklsl,*te reads 2.50N 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 completely submerged in altlt76ahsl* pn kr9 ,0 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 ok1f +zdc f;pwlof; o4lp9/fr*f water with 60% of its volume submerged. If this same cube were placed in a container of oil with dzffpk pc9;o4 fr ll*+1;wf/odensity$ρ=800 kg/m^{3}$ , what portion of the cube’s volume would be submerged while floating?

  12.47: Water flows ideally through a cylindrically-shaped pipe. At theuowtgsx .)1 /e lower end, the pipe’s cross- sectional ars g)x./1uw oteea 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 fluid is marked as it moves along a hor/f nxq2oax +9;puq w4yizontal streamline through a pipe, as shown in the f q;2quxwpx4f + oyn/9aigure. 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 marked fluid when it is in Region II?

  13.25: An ideal fluid completely fills a small horizonta)6 y5ltv tb*th,/ tocdl 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 speed and its associa lvt,d/c* h5tb6 o)ttyted pressure in the narrower region as compared to the wider region?

  10.47: An open cylindrical container with very largevi(h -nlgye;7jtxi: l1t9 db: 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 landt;(l:9y iei:xgb lt n7 1-jhdving 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 cubic block 18-d ts*b3ysi /ym *+s4u ethrfhtl2s 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 pool5wvu 7f (0:xoyx hm2s-c:baza,s* exq is filled with 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 meqbt d+yt)hn2+x *x;t4cj.ccdrcury (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.