94.17: A cork has weiks*n wfcwt 0:5x;0a fcght mg and density 25% of water density. A string is tied around the cork and attached to the f;0 w5wccf:0*x snkat 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:

  01.20: When submerged underwater, the appa//yfr*k/mm )i/ev ipze .i qj-rent mass of one cubic centimeter of pure gold is 18.3i q)-*vef/m//kp zi irjyem./ grams. What would be its mass in air?

  04.29: Three fishing bobbers all individually float ot9 l2u keqj2w wp9.jb( xwy+,mn 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 surface of the water, whij xm,p e(2k wwl+.jub9 q2tw9ych bobber will displace the greatest volume of water?

  01.18: Which of the following is tbl)-5 gga:d(rab 91sjtcg x )the best statement of Pascal's Law?

  05.24: The hydraulic press, which allows large masses to be lifted with smal)xaj20q( tw4oemse/*asy)gf l applied forces4)gt2q/ xf(0oewesy aas) m *j, is a consequence of which principle?

  06.30: A copper block is conne9y r9zra7a/fc cted to a string and submerged in a container of waterz7c 9 a/9arfyr.
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 atmosphexeh8l 5g .rsm9ric pressure is .x95r em8 hgls$1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.0 kg object floats at rest with 75% of thkh2ub vci d2mutj2y 6y3y1,,a6 s2leqe object submerged in a cubical tank conteyikd2sy, 2u3t61v2 ucq y6 2lm ha,jbaining $50.0 m^{3}$ of water. What is the buoyant force acting on the object?

  14.26: A solid cube of iron and a solid cube of aluminu)vm jlxk/e a*;2ijs+a m have 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 the greater buoyant force frmexj*j2a ) a; sv/kli+om the water?

  12.21: A child’s balloon is filled with pure Xenon gas. This balloon then is rel6) 73wj;btdqa, ktz qieast bq,3jz; w76it)dq aked from rest two meters 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 have the ab iz*vha5p/ ox1e47usame radius. Balloon #1 is filled with helium gas while balloon #2 is filled with xenon g uh51a/p74ovxei az*b as. Which one of the following statements about the buoyant forces on the balloons is correct?

  03.36: An ideal fluid flows thrrqj npfb2a/m:*a.fu . ough a long horizontal circular pipe. In one region of the pipe, it has radius R. The pipe then ..m*jafrubqa/ npf2: widens to radius 2R. 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 sectionq-2ec 7.ckg k lrf4r+k as shown. In which section would the pressure of the fkk74fkre2r-gcq.+ lc luid be a minimum?

  07.35: Two objects labe (yep*1njxxo; led 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 forces acting on theseexxy j 1*o;(np objects?

  08.16: A block is connected 4d 3cdw10 uyo t0arsshx,.ti, to a light string attached to the bottom of a large container of water. The tensitih41osd urx0 cds.,t30yaw,on 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 wt 3/ip nh :fzfhvqt05v-6 u0 fzy9+mnohen 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 09nof/u+h6yffvzp5 -hvt0qmz: 3in tbest represents the density of the solid mass(unit: $kg/m^{3}$)?

  09.32: A cube of unknown material and uniform density jamc6)c p.mse v *jfd/r( a84hznm-a9floats in a container of water with 60% of its volume submerged. If this same n9da(caahm8).4 */s pvjm-6zrc jfme 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 pipe. At the lower e-dyryqksppl/eab :;31m9 5uo nd, the pipe’s cb l /ks1ppodr:;u-9 mya q5y3eross- 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 marked as it moves along a q 1+)c*;voxhh*mi uvien-b q0 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 ; vbq qou*xiv 1ic+e0-*)mnh hfluid when it is in Region II?

  13.25: An ideal fluid fjlg+dp668 rg)d 5isec:k g)()mfm du completely fills a small horizontal tube that has a narrowing cross-sectional area as seen in the figure. Which one dfsu+r6)m m dd6)8()fc ggp lgi5jk:eof 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 large radius is at ry(:1 + xxretscest a distance H above the ground at the edge of a platform. A tiny hole develops at the bottom of:ycr x(sxt +e1 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 cub ,nzt ,4rjlv)8npz4fcidu : 0hic 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 sv mb-*)3fdgwhaving 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 wl- ekr 4ey gep.0.nk;0bm3krl4ww3aoith 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.