2. A lost shipping container is found resting on the ocean oor and completely submerged. The container is 6.20 m long, 2.30 m wide, and 2.90 m high. Salvage experts attach a spherical balloon to the top of the container and inflate it with air pumped down from the surface. When the balloon's radius is 1.50 m, the shipping container just begins to rise toward the surface. What is the mass of the conminer? Ignore the mass of the balloon and the air within it. Do not neglect the buoyant force exerted on the shipping container by the water. The density of seawater is 1025 kg/m3. kg 3. A 360 N object oats with three-fourths of its volume beneath the surface of the water. What is the buoyant force on the object? Newtons 4. A raft is made of 15 logs lashed together. Each is 32.0 cm in diameter and has a length of 7.00 m. How many people (whole number) can the raft hold before they start getting their feet wet, assuming the average person has a mass of 70.0 kg? Do not neglect the weight of the logs. Assume the density of wood is 500 kgfm3 People (whole number) 5. A block of mass 0.75 kg and density 600 mm2 is forced under the surface of the water by means of a spring (k = 90.0 N/m) that is xed to the bottom of the container as shown in the gure. How much does the spring stretch? (the density of water is 1000 kg/mE). cm E 6. A solid cylinder (radius = 15.5 cm, height = 14.5 cm) has a mass of 9.30 kg. This cylinder is floating in water. Then oil (density = 725 kglmg) is poured on top of the water until the situation shown in the drawing results. How much of the height of the Cylinder is in the oil? cm 7. A lead block is suspended by means of a string from the underside of a 7.50 kg block of wood of density of 692 kg/m'. If the upper surface of the wood is just level with the water, what is the tension in the string?(The density of lead is 11340 kg/ma) N 8. A large container, 118 cm deep is lled with water. If a small hole is punched in its side 83.0 cm from the top, at what initial speed will the water flow from the hole? mls 9. An ideal fluid is moving at 3.10 mls in a section of a pipe of radius 0.165 m. If the speed in another section is 8.25 m/s, what is the radius there? 10. Water at a pressure of 4.30 atm at street level flows into an office building at a speed of 0.60 m/s through a pipe 4.80 cm in diameter. The pipes taper dawn to 2.00 cm in diameter by the top floor, 23.0 m above. Calculate the water pressure in such a pipe on the top floor. Pa