94.17: A cork has weight ba 9lfcrml548pw9pv8fs;j e6mg and density 25% of water density. A string is tied around the cork and attached to the bottojp; 859pbvamlr fsfel8w6 94cm 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:

  01.20: When submerged underwater, the apparent mass of one cubic centimeter of 954zfc c/imlcq;px8 npure ;z4qxn9lc8i/pcfmc5gold is 18.3 grams. What would be its mass in air?

  04.29: Three fishing bobbers all indiv4f 5fm0q,54j myeid o q fq0by(hug;e.idually 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 identii b;jqefyge040h5y4mu,m ( qq dfo5.f cal 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 statement of Pascal's chth 1s67h:g wxht 4j/*g4i voLaw?

  05.24: The hydraulic9 mge :ziqa:+cw+x l*)ciyv9f press, which allows large masses to be lifted with small applied forces, is a consequence of which princip :zev:99q)gc+ f +iwa*ylxcmile?

  06.30: A copper block is connected to a string *bz-ed pw -r57v efurk+f .h;iand submerged in a container of wapee r;ibfvw*zuf 5k7-h + r-d.ter.
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 tjr*c x l*sv7yq5h:tjz(wy)r js)h +1ihe atmospheric pressure is ihqz sr7: rjt*w5() c)1+jyy hxslvj*$1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.0 kgu3-xb b5. wahg object floats at rest with 75% of the object submerged in a cubical tank b5 wuxh.ag-b3 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:o7(2mdjrqh8viik 2: mx b/ ht solid 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 thmo7x :(2 kqmih /j8 rtdhi2:bve pool’sbottom. Which object experiences the greater buoyant force from the water?

  12.21: A child’s balloon is filled with pure Xenon gas. This balloon thexcdtfifr23cqomq*03 tp +3,q n is released from rest two meters above the ground on Earth. Which one of the following choices best describes the response of the bal,*mr o3q t2+dq3qix3 ff0 tpccloon?

  16.23: At a party, two spherical balloons are expanded to h,gt xaoxb.np 8qa,y36:d 0z bqave the same radius. Balloon #1 is filled with helium gas while balloon #2 is filled with xenon gas. Which one of the following statements about the buoya t q0b b,xaozq8pgd6,xa 3.n:ynt forces on the balloons is correct?

  03.36: An ideal fluid flows through a longwmxotz6x; -p s8 dn*n1,kmq0h 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 of the f;kq*nx0msxp1w- monh68tz d ,luid in region with radius 2R?

  04.24: A fluid is forced through a pipe of changing cross section as shown. In wac87puxjxfupn3 .i )t8:ju1 dhich section would tuxd fuj83pj.xna):8 ipu t17che pressure of the fluid be a minimum?

  07.35: Two objects labeled K ankq*+)wea8j 9jv l0vasd L have equal mass but densities 0.95D0 and D0, respectively. Each of these objects floats after being thrown into a deep swimming pool. Which is true about theea)jv9 wal+jqvs* 8k 0 buoyant forces acting on these objects?

  08.16: A block is connected to a lightp 18a85ygrgby string attached to the bottom of a large container of water. The tension in the string is 3.0 N. The gravitational foy8 ayrg gb51p8rce from the earth on the block is 5.0N. What is the block’svolume?

  15.30: A spring scale reads 2.50b6+zfm ( fpz1m mz:/nwN 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 a container of water. Which one of the following choices best represents the density of the solid mass(u /zmpzw :m+(16mfbfnz nit: $kg/m^{3}$)?

  09.32: A cube of unknown material any t-zubc6 v0(sd uniform density floats in a container of water with 60% of its volume submerged. If this same cube were placed in a container of oil with densit( yu 6btv-zs0cy$ρ=800 kg/m^{3}$ , what portion of the cube’s volume would be submerged while floating?

  12.47: Water flows ideally th g/sxldyj8 i0:rough a cylindrically-shaped pipe. At the lower end, s8 /gxjy:d0l ithe pipe’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 . +w5p+ba/wx8juvgy u ideal 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 marked flu5jub8+u w/agwx+py v. id when it is in Region II?

  13.25: An ideal fluid completely fills i vlj3* m2rp6ba small horizontal tube that has a narrowing cross-sectional area as seen in the figure. Which one of the following choices best describlp6r jbv23*mi es 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 containerc hukab e7 ;+v5u3,cip/tkm0v (a3 quq ;maz+z with very large radius is at rest a distance H above the grou+35;3 tq cbh iap(amk0u,m; auq+ue zvz7/vcknd 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 cubic block is eok/g/gousu6 :0*-nni .+m4 ptpklafgiven 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 0 q()hta+:bh u9ugdp ,w1a mplwith 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 mercury (d rfwuup/s6 4,bp(r66jg,id t gensity $13.6g/cm^{3}$) 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.