An airplane flies on a level path. There is a pressure difference of 520 Pa between the lower and upper surfaces of the wings. The area of each wing surface is about 190 m2. The air moves below the wings at a speed of 80.4 m/s. A- Estimate the weight of the plane. _N B- Estimate the air speed above the wings. m/s
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- A box-shaped metal can has dimensions 5 in. by 13 in. by 3 in. high. All of the air inside the can is removed with a vacuum pump. Assuming normal atmospheric pressure outside the can, find the total force (in Ib) on one of the 5-by-13 in. sides. (Enter the magnitude.) IbFish control their buoyancy through the use of a swim bladder, a gas-filled organ inside the body. You can assume that the pressure inside the swim bladder is roughly equal to the external water pressure. A fish swimming at a particular depth adjusts the volume of its swim bladder to give it neutral buoyancy. If the fish swims upwards or downwards, the changing water pressure causes the bladder to expand or contract. Consequently, the fish adjusts the amount of gas in the bladder to restore it to the original volume and reestablish neutral buoyancy. Consider a large, 10.0 kg striped bass swimming in fresh water. When neutrally buoyant, 7% of the total volume of the fish is taken up by air in the swim bladder. Assume a constant body temperature of 15°C and neglect the mass of the air in your calculations. If the fish begins at a depth of 20 meters, what will the volume of the swim bladder be if the fish ascends to a depth of 10 m without changing the quantity of gas in the swim bladder?An air bubble originating from an under waterdiver has a radius of 5 mm at some depth h.When the bubble reaches the surface of thewater, it has a radius of 6.3 mm.Assuming the temperature of the air in thebubble remains constant, determine the absolute pressure at this depth h. The accelerationof gravity is 9.8 m/s2.Answer in units of Pa. b. Determine the depth of the diver.Answer in units of m.
- The four tires of an automobile are inflated to a gauge pressure of 1.9 x 105 Pa. Each tire has an area of 0.024 m² in contact with the ground. Determine the weight of the automobile. NB9The drawing shows an intravenous feeding. With the distance shown, nutrient solution (p = 1020 kg/m³) can just barely enter the blood in the vein. What is the gauge pressure of the venous blood? Express your answer in millimeters of mercury. Atmospheric pressure 0.610 m Number i Units
- Question 7 of 18 You come across an open container that is filled with two liquids. Since the two liquids have different densities, there is a distinct separation between them. Water, which has a density of pw = 1.00 × 10³ kg/m³, fills the lower portion of the container to a depth of 0.200 m. The fluid that is floating on top of the water is 0.307 m deep. If the absolute pressure on the bottom of the container is 1.049 × 10° Pa, what is the density, pi, of the unknown fluid? The acceleration due to gravity is g = 9.81 m/s² and atmospheric pressure is Po = 1.013 x 10° Pa. Pi = kg/m3A PROBLEMS 6.63, 6.64 6.64 This "double" nozzle discharges water (at 10°C) into the atmosphere at a rate of 0.50 m /s. If the nozzle is lying in a horizontal plane, what x-component of force acting through the flange bolts is required to hold the nozzle in place? Note: As- sume irrotational flow, and assume the water speed in each jet to be the same. Jet A is 10 cm in diameter, jet B is 12 cm in diame- ter, and the pipe is 30 cm in diameter.THER The four tires of an automobile are inflated to a gauge pressure of 1.9 x 10° Pa. Each tire has an area of 0.023 m in contact with the ground. Determine the weight of the automobile. N Need Help? Read It
- Two pistons push down on the fluid filling two cylinders connected by a narrow hose, as shown in the figure. The area A1is 1 square inch, and the area A2 is 10 square inches. A force of 4 pounds is exerted downward on piston 1, as shown. The pressure on A1 in psi is a. 0.25 b. 0.4 c. 4 d. 10 e. 40 The pressure on A2 in psi is a. 0.25 b. 0.4 c. 4 d. 10 e. 40A 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?At the surface of a freshwater lake, the pressure is 105 kPa. What is the approximate pressure decrease in going 42.6 m above the surface? Air at 20°C has density of 1.20 kg/m3. in kPa What is the approximate pressure decrease in going 42.6 m above the surface? Air at 20°C has density of 1.20 kg/m3. In pa