21.A sold cubic wood with sides of L and density of 850 kg/m³ is floating of the surface of the Pacific Ocean which has a density of 1050 kg/m³. Assume that the cube is floating straight up on surface of water. The percentage of the cube that stays out of the water is equal to (a) 0 % (b) 15 %
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- A lost shipping container is found resting on the ocean floor and completely submerged. The container is 6.4 m long, 2.4 m wide, and 2.9 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 1.3 m, the shipping container just begins to rise towards the surface. What is the mass of the container? 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. Number UnitsAn airplane flies on a level path. There is a pressure difference of 618 Pa between the lower and upper surfaces of the wings. The area of each wing surface is about 100 m2. The air moves below the wings at a speed of 80.5 m/s. A.)Estimate the weight of the plane. B.)Estimate the air speed above the wings. Density of air is 1.29 kg/m3.An object made of iron appears 300 N lighter in water than in air. The density of iron is equal to 7870 kgm-3 , and the density of water is 1000 kgm-3 . a) What is the volume of the object? b) What is the object’s weight in air?
- 1. A U-tube contains liquid of unknown density. An oil of density 780 kg/m³ is poured into one arm of the tube until the oil column is 11.5 cm high. The oil-air interface is then 5.0 cm above the liguid level in the other arm of the U-tube. Find the density of the liquid. kg/m3 0741 na741 na41na74na74 741 na741 na74 n741 na741 741 na741 na741 na7 0741 na741 n28. A 6.00 [kg] aluminum metal is suspended in a rope and partially immersed in water (Pwater = 1000 [kg/m³]). If the tension in the rope is 4.55 [N], what volume of aluminum was immersed? -3 A. 5.54 x 10-³ [m³] C. 5.54 [m³] B. 6.46 × 10−³ [m³] D. 6.46 [m³]A house weighs 12,000 pounds. a. Air normally has a density of 1.29 kg/m^3 but at 250 degrees air has a density of 0.9 kg/m^3. What volume of hot air balloon is needed to float this house off the ground? b. At standard temperature and pressure Helium has a density of 0.16 kg/m^3. How many 30 cm diameter helium balloons will it take to float the house?
- A 2.5-m-tall steel cylinder has a cross-sectional area of 1.5 m2. At the bottom, with a height of 0.5 m, is liquid water, on top of which is a 1-m high layer of gasoline, relative density of 0.8. The gasoline surface is exposed to atmospheric air at 101 kPa. What is the total mass of the liquid in the cylinder? 2000 kg O 1250 kg O 3250 kg O 1625 kgA block of wood with dimensions 60.0 cm × 40.0 cm × 8.0 cm floats on water with 75% of its volume below the surface of the water. While floating on water, how much mass can be placed on top of the block before it is completely submerged? The density of water is 1000 kg·m−3(Figure 1) shows a container with a cross section area of 15 cm² in which a layer of water floats on top of a layer of mercury. A 1.0 kg wood block with a cross-section area of 10 cm² floats on the water. The water depth, measured from the bottom of the block, is 25 cm. A pressure gauge at the bottom of the container reads 20 kPa. Figure 1.0 kg 25 cm h 10 cm² 15 cm² 1 of 1 > Part A = What is the depth dm of the mercury? Use pw = 1000 kg/m³ as the density of water and pm density of mercury. Express your answer in centimeters. ► View Available Hint(s) dm = Submit ——| ΑΣΦ Provide Feedback Request Answer ? cm Review 13,600 kg/m³ as the Next >
- A cube of some unknown substance is held submerged in water. The cube has a mass of 0.540 kg and a volume of 0.000770 .What is the acceleration of the cube when it is released?1.A popular pool toy allows the user to push a plunger to compress water in a barrel with a diameter of 3.5 cm. The water is compressed with a speed of 1.9 m/s and emerges from a small opening with a speed of 12 m/s. What is the diameter (in mm) of the opening? Assume the toy is oriented horizontally. mm