8. [-/2 Points] DETAILS SERCP11 9.7.P.036. MY NOTES PRACTICE ANOTHER A liquid (p = 1.65 g/cm) flows through a horizontal pipe of varying cross section as in the figure below. In the first section, the cross-sectional area is 10.0 cm", the flow speed is 294 cm/s, and the pressure is 1.20 x 105 pa. In the second section, the cross-sectional area is 3.50 cm. a) Calculate the smaller section's flow speed. (Enter your answer to at least two decimal places.) m/s b) Calculate the smaller section's pressure. Pa Need Help? Read It Watch It 9. [-/3 Points] DETAILS SERCP11 9.7.P.042. MY NOTES PRACTICE ANOTHER Water moves through a constricted pipe in steady, ideal flow. At the lower point shown in the figure below, the pressure is 1.65 x 105 pa and the pipe radius is 2.70 cm. At the higher point located at y = 2.50 m, the pressure is 1.30 x 105 pa and the pipe radius is 1.20 cm. a) Find the speed of flow in the lower section. m/s b) Find the speed of flow in the upper section. m/s c) Find the volume flow rate through the pipe. m /s Need Help? Read It 10. [-/2 Points] DETAILS SERCP11 9.8.P.050. MY NOTES PRACTICE ANOTHER To lift a wire ring of radius 1.85 cm from the surface of a container of blood plasma, a vertical force of 1.70 x 10-2 N greater than the weight of the ring is required. Calculate the surface tension of blood plasma from this information. N/m Need Help? Read It11. [-/2 Points] DETAILS SERCP11 9.8.P.051. MY NOTES PRACTICE ANOTHER certain fluid has a density of 1085 kg/m and is observed to rise to a height of 1.9 cm N/m d the fluid is zero. Calculate the surface tension of the fluid. Need Help? Read It5. [-/4 Points] DETAILS SERCP11 9.5.P.020. MY NOTES PRACTICE ANOTHER A 64.0-kg survivor of a cruise line disaster rests atop a block of Styrofoam in as a raft. The Styrofoam has dimensions 2.00 m x 2.00 m x 0.0825 m. The bottom 0.022 m of the raft is submerged. (a) Draw a force diagram of the system consisting of the su num size of 1 MB.) Choose File |No file chosen This answer has not been graded yet. (b) Write Newton's second law for the system in one ght of the survivor, and w, for the weight of the raft. (Set a = 0. Solve for Fy, the y-component of the net force. Let upward be the positive y-direction.) = (c) Calculate the numeric value for the buoyancy, B. (S has density 1025 kg/m . Enter answer to at least the ones digit.) N d) Using the value of B and the weight w of the survivor, calculate the weight w, of the Styrofoam. IN e) What is the density of the Styrofoam? kg/m3 (f) What is the maximum buoyant force, corresponding to the raft being submerged up to its top surface? (9) What total mass of survivors can the raft support? Need Help? Read It 6. [-/2 Points] DETAILS SERCP11 9.7.P.032. MY NOTES PRACTICE ANOTHER A horizontal pipe widens from a radius of 0.140 m to 0.300 m. If the speed of the water is 1.10 m/s in the larger pipe, what is the speed in the smaller pipe (in m/s)? HINT m/s Need Help? Read it Watch It 7. [-/2 Points] DETAILS SERCP11 9.7.P.035. MY NOTES PRACTICE ANOTHER (a) Calculate the mass flow rate (in grams per second) of blood (p = 1.0 g/cm ) in an aorta with a cross-sectional area of 2.0 cm if the flow speed is 31 cm/s. g/s b) Assume that the aorta branche a of 3.0 x 103 cm2. What is the flow speed in the capillaries? cm/s Need Help? Read it1. [-/2 Points] DETAILS SERCP11 9.2.OP.001. MY NOTES PRACTICE ANOTHER A block of solid aluminum sits on a flat, level table. Aluminum has a density of 2.71 x 105 kg/m . The mass of the block is 21.6 kg. (a) What is the volume of the block (in m3)? m3 (b) The amount of surface area of the block in contact with the table is 3.23 x 10-2 m2. What is the av e (in Pa) exerted on the table by the block? Pa Need Help? Read It 2. [-/2 Points] DETAILS SERCP11 9.4.OP.009. MY NOTES PRACTICE ANOTHER (a) A submersible vehicle is in a lake at a depth of 23.6 m. What is the absolute pressure (in Pa) at this depth? The density of the water in the lake is 1.00 x 105 kg/m, and the air above is at a pressure of 101.3 kpa. Pa (b) The submersible vehicle has a circular window with a diameter of 30.0 cm. What force (in N) is exerted by the water on the window of the vehicle at the depth from part (a)? (Enter the magnitude.) N Need Help? Read It 3. [-/2 Points] DETAILS SERCP11 9.5.OP.017. MY NOTES PRACTICE ANOTHER A hollow ball with a diameter of 3.72 cm has an average density of 0.0841 9/cm3. What force must be applied to hold it stationary while it is completely submerged under water? (Enter the magnitude in N, and select the direction from the options given.) magnitude direction --Select-.. Need Help? Read It 4. [-/3 Points] DETAILS SERCP11 9.5.P.021. MY NOTES PRACTICE ANOTHER A hot-air balloon consists of a basket hanging beneath a large envelope filled with hot air. A typical hot-air balloon has a total mass of 549 kg, including passengers in its basket, and holds 2.77 x 103 m of hot air in its envelope. If the ambient air density is 1.23 kg/m3, determine the density (in kg/m3) of hot air inside the envelope when the balloon is neutrally buoyant. Neglect the volume of air displaced by the basket and passengers. HINT kg/m3 Need Help? Read it Watch It