94.17: A cork has weight mgdk* skiltt8* 5s(h(e z and density 25% of water density. A string is tied around the cork and attached to the bottom of a water-filledt kkesi8z*ts5l*(( hd 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 ofeuz zo-qlibq. zg10s:t:p 6 t2 pure gold is 18.3 gramzq:z : qu.szt2 lp- igtbo0e16s. What would be its mass in air?

  04.29: Three fishing bobberz xmdyk:yke1 +:ayo cz ,oelyrzq2w)(s5 8s*5 s 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 sxl d: 5soyeyrzyc2y:oz1 (8k ,k qs w*)a5z+emurface of the water, which bobber will displace the greatest volume of water?

  01.18: Which of the following is the bes ii ;ut4h86mzvt statement of Pascal's Law?

  05.24: The hydraulic press, which allows large my3 y ugjm*18rchrv88masses to be lifted with small applied forces, is a consequence o8 u ymc rhjg883*rm1yvf which principle?

  06.30: A copper block is connected to ns-28ti;ke ...m fgz6dln qgsa string and submerged in a container of water.tq.n6fkn;dz .-im8s .2ggsle
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 atmospheric prel(er.v5zz/p2 qbu;aw y5cl nlp7e8y 1fn3/npssure is wppl2ybfyr e7zpv/qa u( /ecnn58;3n1 z .l5l $1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.0 kg obf /vstdynl:3+ject floats at rest with 75% of the object submerged in a cubical tank /n3tv yl:dfs+ 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 habr 0auls.*:r vt,+nhwve equal mass. The cubes areplaced into the same large pool of water so that each is completely s w0* +a tlh:vr,bs.nruubmerged 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. b arfk/ 370 jnai7(klhThis balloon then is released from rest two meters above the ground on Earth. Which one of the following choices best describes the response of the balloo f 7njb/( alakhik07r3n?

  16.23: At a party, two spherical balloons are exp.tt: nmb1zjv8p:, ey nanded to have the same radius. Balloon #1 is filled with helium gas while balloon #2 is filled with xenon gas. Which one of the fon8tpy.b:,t :m vn1e zjllowing statements about the buoyant forces on the balloons is correct?

  03.36: An ideal fluid flows through a long horizontal circular pipe.wt)hdt7ueaodtk;d7, 8 /3c jt i(.iph In one region of the pipe, it has radius R. The pipe then widens to radius h)cwtd7/t7 ;eiia k ,tpdd3 .uojt(8 h2R. What is the 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 sec0ahks e3bu p*wb 4xvv9rc- blwfk 8)4,tion as shown. In which section would the pres xhc3w4av, sk * bf90-bpk8evbru4w)lsure of the fluid be a minimum?

  07.35: Two objects labwk:12uhl;2t /ix d lkfeled K and 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 the buoyant force x/;1 uw:kd2lk lht2ifs acting on these objects?

  08.16: A block is connected to+ - nfe11gcxqg a light string attached to the bottom of a large container of water. The tension in the string is 3.0 N. The gravitational force from the earth on the block is 5.0N. What1 eg fq1nxg-c+ is the block’svolume?

  15.30: A spring scale reads 2.50N when a smalr+z ( .qe-mlpl9hcc ;jl 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+e;p .rch q(cmzll9 -j the following choices best represents the density of the solid mass(unit: $kg/m^{3}$)?

  09.32: A cube of unknown material and uniform density2pq v.v5g uza3 floats in a container of 2p5.zgvv u3qa water with 60% 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 azgre 0-wo+i 4o cylindrically-shaped pipe. At the lower end, th+or-ei0w4 g zoe 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 ideal fluid is markedo/r+exyc )i luc; +t0i as it moves along a horizontal streamline through a pipe, as shown in the figure. In Regiono 0lrt +x +ui/)iycec; 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 f vd9pwdf 7-2bccjr5((gds 3v nills 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 speed and its associated pressure in the narrower region as compared to the wider regiongcp-2bf d5rc (dv n wvs93jd7(?

  10.47: An open cylindrical container with very l9 2cr,dc3r 6sy6yh8l jx9khkt arge 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 s h,2 s8crlx tj93kcyd66y9hkrquirts 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 given ** ej; kgqtgick+(n c6as $ρ=0.750 g/cm^{3}$ . 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 poox,em s88doji/l 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 mercury (densi 9. gvddg,ptpqi g-,)mty $13.6g/cm^{3}$) 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.