94.17: A cork has weight mgwlw3hf:i im:gru l f3j.k8 ;b- and density 25% of water density. A string is tied around the cork an:;k.l bf ijwr:u3h8liw3 mg-f d 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 tension in the string is:

  01.20: When submerged underwaterxux ldboe d. 2d*e1f06, the apparent mass of one cubic centimeter of pure gold is 18.3 grams. What would bdo0ux6edd 2 be*1 .flxe its mass in air?

  04.29: Three fishing bobbers all individually float o8fiu0w- pb ,pfn 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 b ppfb8 -w,0fiueneath the surface of the water, which bobber will displace the greatest volume of water?

  01.18: Which of the following is the bel-g g jw.4x6wfst statement of Pascal's Law?

  05.24: The hydraulic press, which allows large masses to be lifted with small ap uyew:v btxpa0p0m ex(06u .x9plube u.x(:m9txpp0y6e wxva 00ied forces, is a consequence of which principle?

  06.30: A copper block is connected to a string(6jela 0tvuwh p58 eb-jjm31 b and submerged in a container of wateeaj6-b8mpbv jh5(3t eju 0w1lr.
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 andp:vf-mjqnp.u095 fv exm:;fl(d q ;rv 5.0 m wide. If the atmospheric pressure is vj;f:q v5:u-p f9elfx rqm ; (pvm0d.n$1.0 × 10^{5}Pa$, what force does the atmosphere exert on the driveway?

  10.22: A small and uniform 10.0 kg r8w-wsmm f2l3*qh,f pobject floats at rest with 75% of the object submerged f 3wqh,2pr8w s*f- mmlin 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 aluminum have equalv(y .jz4l8vus mass. The cubes areplaced into the same large pool o.zs8 vj(l 4vuyf 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 purbh a sz2v6 yu)kjied ez6q20.: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 balloon?ez hz62.bsuki2q )jyve0:da6

  16.23: At a party, two spherical balloons are expanded to5 ohl( 9bt;)jo) teycrg mbo32 have the same radius. Balloon #1 is fi95jg2ot tloo b; y hebm)r)(3clled 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 correct?

  03.36: An ideal fluid flows tuu sq vhpj,-h ;p:fa7w9h o01phrough 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 q7usu10fh hp o9phv,pja: ;w- the speed of the fluid in region with radius 2R?

  04.24: A fluid is forced through a pipe of changing cross section as shown. et:bqf mbnn89ch4: i5 2a3 pmdIn which section would the pressure of the fluid be afc dnt5:eqbi:h 9bmnp34 8m2a minimum?

  07.35: Two objects lab tgh9udzm30mja8)7bc agv15 peled 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 buoy h9gpz7a 0a mv1um8cjt3d )gb5ant forces acting on these objects?

  08.16: A block is connected to a light string attached to the bottvdal mo5e)-(mrru0: q om of a large container of water. The tension in the s dre0m-qvl:a5u(o )rmtring 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 small solid mass hangs from3 a2znaod4i:j 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 zj 24 adn3io:athe solid mass(unit: $kg/m^{3}$)?

  09.32: A cube of unknown material anujxs4rx;sb,u+ n 0 -und uniform density floats in a container of water with 60% of its volume submerged. If this same cu-xuux,4u +ns;0bsj rnbe 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 ax(k+gj2u/) vgiwl) d z cylindrically-shaped pipe. At the lower end, the pipe’s cross- sectional are )uzjld)2gwvgx( ki+/ a 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 movep;emzki z d*e;(x3 4pcs along a horizontal streamline through a pipe, as shown in the figure. In Region I, the speed of t4kpmex( zce*i; d3p;z he 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 horizontal tube th: s **2tmny xmga 1v,tn2rlnx4at 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 stm*rl y*v 4gnxman : 21ntx,2compared to the wider region?

  10.47: An open cylindrical container with very large ra:.(kxae s zepha5jvem( 7m0y (r74 ysadius 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 froseym(zs 7(7y0ah: a( 4vak5erj. x empm 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 given; u8at :aafso; 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 -f4p0y/e 2oui a(d-hqrw0 zie 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 mercure 6gg;0j r+y+5jbmchdy (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.