Concept explainers
When you drink a beverage with a straw, you need to overcome both gravity and friction in the straw. Estimate the fraction of the total effort you put into quenching your thirst of each factor, making suitable assumptions about the liquid and straw properties, and your drinking rate. For example, how long it would take you to drink a 12-oz drink if you drank it all in one go (quite a feat with a straw)? Is the flow laminar or turbulent? (Ignore minor losses.)
Want to see the full answer?
Check out a sample textbook solutionChapter 8 Solutions
Fox And Mcdonald's Introduction To Fluid Mechanics
Additional Engineering Textbook Solutions
Degarmo's Materials And Processes In Manufacturing
Introduction To Finite Element Analysis And Design
Engineering Mechanics: Dynamics (14th Edition)
Mechanics of Materials (10th Edition)
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
- The mean volume flow rate in the femoral artery is 5 ml/s. The length of the femoral artery is 18 cm and the diameter is 1.0 cm. Estimate the pressure drop over the length of this artery assuming steady flow. The kinematic viscosity of blood is 0.032 Poise. Give your answer in mmHg.arrow_forward(You are tasked to supervise the design of 0.5MW wind turbine to be constructed in the Wind Farm in Pililla, Rizal. Suppose the design criteria are as follows: The air density as surveyed after 2 year period averaged at 1.225 kg / cubic meter; the sweeping diameter of the rotor blades is 125m; and the anemometer reading in the area amounts to 4.2m/s on a 2 year period of survey. What is the theoretical power output of the turbine assuming 100% efficiency of operation? Your answer must be in kW and in two decimal places with correct signs) In the design specifications given, if the actual measurement of power via the substation amounts to exactly 530kW and given that the windspeed is off by 0.05m/s, what could have been the error in the measurement of diameter? Your answer must be in 3 decimal places and in correct signs and measurement.arrow_forwardIn an oil pool, a small steel ball is released from the surface (y=0) without initial velocity. The strength of the resistance force exerted by the oil against the movement of the ball is directly proportional to the speed of the ball (Fd = k*V , k: constant). Neglect the buoyant force exerted by the oil. (m = 0.2kg, k = 0.843550 kg/s, g = 9.81 m/s^2). a-) What is the limit speed of ball ( Vlim)? b-) What is the time it takes for the speed of the ball to reach 99% of the limit speed after it is released from the surface? c-) What is the depth at which the ball's velocity reaches 99% of the limit velocity after it is released from the surface?arrow_forward
- A wind tunnel has an incompressible flow of air, flowing horizontally from an inlet section, 7 times the test section. A u-tube is connected, containing mercury inside. The mercury has 1.33x10^5 N/m^3 specific weight. The condition of the air at the inlet section is at 1 atm and 280K respectively. What is the change of height inside the mercury, when the velocity at the throat is 70m/s?arrow_forwardControl volume concept can be used to obtain forces in both internal and external flow. By drawing a control volume around a region of fluid to expose the stresses acting on the boundaries and applying the conservation of mass and conservation of momentum in integral form, the net forces acting on the fluid and hence the reaction forces acting on the solid boundary can be calculated. The advantages of this approach over differential approach are: (i) It is an easy way to obtain net forces. (ii) It gives a detailed understanding of how these forces are generated. (iii) It is commonly used in engineering practice to obtain reaction forces on pump, turbine, elbow, etc. for the design of anchoring fixtures/foundation. (A) (B) (C) (D) (i) and (ii) (i) and (iii) (ii) and (iii) All of the abovearrow_forwardThe 30cm long left coronary artery is 4.6mm in diameter. Blood pressure drops by 3.0mm of mercury over this distance. answer the following: part(A): what is the average blood speed through this artery?(express your answer with the appropriate units.) part(B): what is the volume flow rate in L/min through the artery?arrow_forward
- "You are tasked to supervise the design of 0.5MW wind turbine to be constructed in the Wind Farm in Pililla, Rizal. Suppose the design criteria are as follows: The air density as surveyed after 2 year period averaged at 1.225 kg / cubic meter; the sweeping diameter of the rotor blades is 125m; and the anemometer reading in the area amounts to 4.2m/s on a 2 year period of survey. What is the theoretical power output of the turbine assuming 100% efficiency of operation? Your answer must be in kW and in two decimal places with correct signs." In the previous problem, if the diameter measurement is off by 0.1m and the anemometer reading is also fluctuating by 0.05m/s and if the error measurement for theoretical power output must be limited to 3%, WHY OR WHY NOT should you accept the design?arrow_forwardChoose the correct answer to the following (solution is required): If we have (6 m³) of oil weight (47000N), using Yw = 9790 N/m³ (1) Specific weight is (a) 7800 N/m³. (b) 7833 N/m³, (c) 7850 N/m³, (d) 8000 N/m³ (2) The density of oil is (a) 798 kg/m³. (b) 810 kg/m³. (c) 795 kg/m³. (d) 804 kg/m² (3) The specific gravity of oil is (a) 0.81, (b) 0.85, (c) 0.8, (d) 0.9arrow_forward200 pm 0.12 cm Fluid Stationary cylinder 4 In regions far from the entrance, fluid flow through a circular pipe is one-dimensional, and the velocity profile for laminar flow is given by u(r) = Umax(1 - r/R9), where R is radius of the pipe, r is the radial distance from the center of the pipe, and Umax is the maximum flow velocity, which occurs at the center. Obtain (a) a relation for the drag force applied by the fluid on a section of the pipe length L and (b) the value of the drag force for water flow at 20°C with R = 0.08 m, L = 15 m, Umax = 3 m/s, and u = 0.0010 kg/m.s. %3Darrow_forward
- 2. A storage contains liquid at depth y where y-0 when the tank is half full, as shown below. Liquid is withdrawn at a constant flow rate Q to meet demands. The contents are resupplied at a sinusoidal rate 3Qsin2(t). The storage tank has a diameter D=5m. a. Beginning from conservation of mass, formulate an equation for the change in dV TD2 depth of water as a function of time. Hint: dt din - 9out and V = 4 b. Use Euler's method to solve for the depth y, show the iterative equation for the Euler's method, and use Q=5 m3/s to complete the table below: t (s) y (m) 0.5 1.0arrow_forwardsailing vessels can carry lead ballast such as bricks to keep the vessel properly oriented and upright in the water. Consider a vessel that takes on cargo and the crew jettisons a total of 0.500m^3 of the lead ballast into water 2000 m deep. Seawater's density is equal to 1.025g/cc while lead's bulk modulus equals to 42 GPa. Find the change in pressure at 2km depth.arrow_forwardA Closed tank of water with Length, I = 20 ft Height, h = 10.45 ft %3D Width, w = 5.6 ft Pgage = 0 kPa at the top before acceleration is accelerating at an angle of 38° with respect to the horizontal, where the x component of the acceleration is parallel to that of the length of the tank at a rate of 6.35 ft/s² . If the tank is 76% %3D full, calculate the pressure at the bottom of the left side of the tank and the force acting at the top of the tank during acceleration. Take note that the tank is fixed such that it remains parallel to the horizontal during accelerationarrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY