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- 98. A rectangular block of wood floats in fresh water (density = 1000 kg/m³) with its lower 10 cm submerged. What distance (in cm) will be submerged when it floats in seawater (density = 1030 kg/m³)?3. A rectangular block of volume Vo is placed in a tank of water and sinks to the bottom. Describe the buoyant force acting on this block. What could be a possible density of the block? a. The buoyant force equals the weight of a volume of water of Vo, 5.00 grams/cm3 b. No buoyant force acts on the block, 0.0500 grams/cm3 c. The buoyant force equals the weight of a volume of water of Vo, 0.450 grams/cm3 d. The buoyant force equals the weight of a volume of water of Vo, 0.100 grams/cm3 e. The buoyant force equals the weight of a volume of water of one-half of Vo, 0.333 grams/cm36. A piece of cork has a mass of 550 grams. An 18 N sinker is attached to it. With only the sinker in water, the cork and sinker weigh 20.7 N, with the sinker and cork both in water, they weigh 0.9 N. When the sinker was immersed in alcohol, it weighed 15.7 N. Determine the density of the cork in kg/m³? What is the specific gravity and density of the sinker? Determine the density of the alcohol in gm/ml.
- 1. Two blocks of different sizes and masses float in a tray of water. Each block is half submerged, as shown in the figure. Water has a density of 1000 kg/m³. What can be concluded about the densities of the two blocks? 2x 2x (A) The two blocks have different densities, both of which are less than 1000 kg/m³. (B) The two blocks have the same density of 500 kg/m. (C) The two blocks have the same density, but the density cannot be determined with the information given. (D) The larger block has a greater density than the smaller block, but the densities of the blocks cannot be determined with the information given.A glass container weighing 4 N has of water and a 1 N block of styrofoam (100 kg/m3) that is held underwater by a rope. The rope is cut. 1. What is the acceleration of the block? (ignore friction). 2. What happens to the water level?A force of 120.0 N is applied to 2.000 cm diameter piston, which is in contact with a closed container of water (density of water = 1,000 kg/m3). A second piston, with a diameter of 25.00 cm and at the same height as the first piston, is also in contact with the water. What force does the water pressure exert on the second piston? Multiple Choice 10,450 N. 8,450 N. 18,750 N. 9,150 N. 9,500 N.
- Q1): The mattress of a water bed is 2 m long by 2 m wide and 30 cm deep. A) Find the weight of the water in the mattress. B) Find the pressure exerted by the water on the floor when the bed rests in its normal position. Assume that the entire lower surface of the bed makes contact with the floor. C) What if the water bed is replaced by a 300-lb ordinary bed that is supported by four legs? Each leg has a circular cross section of radius 2 cm. What pressure does this bed exert on the floor?3. Water at a pressure of 4.30 atm at street level flows into an office building at a speed of 0.75 m/s through a pipe 4.60 cm in diameter. The pipes taper down to 1.70 cm in diameter by the top floor, 22.0 m above. Calculate the water pressure in such a pipe on the top floor. Pa1. Piston A has a cross section of 1,600 cm² while that of B is 950 cm². B is higher that A by 2.6 m. if the intervening passages are filled with a liquid having a specific gravity of 1.24 and a force of 4.4 kN acting on B A) What must be the pressure at piston B B) What must be the pressure at piston A C) What must be the force exerted at piston A