94.17: A cork has weight mg and density - ,s9u3bdlpyh 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 accompanying figure, the cork is totally immersed in the water. Expressed in terms of the cork weight mg, the t-,3p hyd l9subension in the string is:

  01.20: When submerged underj0 s6kx oq*r.ds2tp 8jwater, the apparent mass of one cubic centimeter of pure gold is 18.3 gram*.qst68p0 roxj 2dj kss. What would be its mass in air?

  04.29: Three fishing box- 9wvmlhl a;v,b u.be5knt(3bbers 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 surface of the water, which bobber will displace the greatest volume of wat w;va mbb.-ehxu,(5 k9lnv3lter?

  01.18: Which of the following is the best statement of Pascal's Lab 6otobj910ojw?

  05.24: The hydraulic press, w .jtbo(6xp9i nhlzm( v,0o pf-hich allows large masses to be lifted with small applieoj.9 ohifpmv( p0nz(b,6 lx-td forces, is a consequence of which principle?

  06.30: A copper block is connected to a string and ba1bk2vgm pq 0k+m;:fsubmerged in a container of wateramp 01:gmf 2qkv bb;k+.
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*khtj2ffw va *8vk7r) m wide. If the atmospheric pressure is t7*h 2r *fj)vk8 wkfva$1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.0 kgm4m f7:8g bimy object floats at rest with 75% of the object submey4mb mg8 i:mf7rged in a cubical tank 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 aluminfl(;*vdr)b zlum 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 ;l)(bv l*drfz force from the water?

  12.21: A child’s balloon is filled with purw/fp( itw47of 8 kno.9ijzow+e 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 response of the ba+fpwi .jtn 8o(/7z wi94fo okwlloon?

  16.23: At a party, two spherical balloonsx rkb:9tg ljrcfu + hqf(026(nnhj:y1 are expanded to have 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 buoyant forces on the balloons is correcqg j1y uk6c(xn+0 fn: rht2(lrf:jb9ht?

  03.36: An ideal fluid flo0tc x l-0f45awyqdnx 3ws 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 of the fluid in region with 50w0d-fq3 xtnlcay 4xradius 2R?

  04.24: A fluid is forced through a pipe of changing cr; :u b.t*pytqooss section as shown. In which section would the pressure of the fluid be a minimbytpuo;:. tq*um?

  07.35: Two objects labeled K and L have equal mass but den( tpij9u atihww,+ .b8sities 0.95D0 and D0, respectively. Each of these objects floats after being thrown into a deep swimming piiw8t j tbhw,9u(p.a+ ool. 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 larg-16/htcle c 69ap+py j vpwb9l.i0vv be container of water. The tension in the stringlvwbpv+/6-ipt 9 0e j91vlbpcy .a6ch 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 when a sm 3h-52ln-q-in +z wjvq si5iftall 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 re +stwjiqn-f2nz hiq5i 5 -v-l3presents the density of the solid mass(unit: $kg/m^{3}$)?

  09.32: A cube of unknown material and uniform density floats 2ap7wexy.(gd0c( 4mha0ds f c in a container of water with 60% of its volume submerged. If this same cube were placed cyg( a(x0s e74wfa0 chp mdd.2in 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 tnhx0w) e5y)jy hrough a cylindrically-shaped pipe. At the lower enyex5ywh0))j nd, the 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 marked app z8hw8l)x 52i (jtgqs 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 fluid when it is in Region II? p2lpx(ij) qg85 hzw 8t

  13.25: An ideal fluid completely q vizt(4i*b qe*4)htffills 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 f b(zveiqtt hq )4**f4iluid’s speed and its associated pressure in the narrower region as compared to the wider region?

  10.47: An open cylindrical container with vot.ylcmeq22 o+o/hj 2 ery large 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 2o q+oolytc.h2 em/2j 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 0-x)e 3ithh)k g 6tpwklvaq,. solid cubic 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 /h0o jq:ogc e2having 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 me g 7t6kxzk..psb:g,izrcury (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.