Applied Fluid Mechanics: Global Edition
7th Edition
ISBN: 9781292019611
Author: Robert Mott
Publisher: Pearson Higher Education
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Chapter 17, Problem 17.9PP
A highway sign is being designed to withstand winds of
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Chapter 17 Solutions
Applied Fluid Mechanics: Global Edition
Ch. 17 - A cylinder 25 mm in diameter is placed...Ch. 17 - As part of an advertising sign on the top of a...Ch. 17 - Determine the terminal velocity (see Section 2.6.4...Ch. 17 - Calculate the moment at the base of a flagpole...Ch. 17 - A pitcher throws a baseball without spin with a...Ch. 17 - A parachute in the form of a hemispherical cup 1.5...Ch. 17 - Calculate the required diameter of a parachute in...Ch. 17 - A ship tows an instrument in the form of a 30...Ch. 17 - A highway sign is being designed to withstand...Ch. 17 - Assuming that a semitrailer behaves as a square...
Ch. 17 - A type of level indicator incorporates four...Ch. 17 - Prob. 17.12PPCh. 17 - A bulk liquid transport truck incorporates a...Ch. 17 - A wing on a race car is supported by two...Ch. 17 - Prob. 17.15PPCh. 17 - The four designs shown in Fig. 17.16 for the cross...Ch. 17 - Prob. 17.17PPCh. 17 - Prob. 17.18PPCh. 17 - An antenna in the shape of a cylindrical rod...Ch. 17 - Prob. 17.20PPCh. 17 - Prob. 17.21PPCh. 17 - Prob. 17.22PPCh. 17 - Assume that curve 2 in Fig. 17.5 is a true...Ch. 17 - Prob. 17.24PPCh. 17 - Prob. 17.25PPCh. 17 - A small, fast boat has a specific resistance ratio...Ch. 17 - Prob. 17.27PPCh. 17 - Assume that Fig. 17.11 shows the performance of...Ch. 17 - Calculate the total drag on an airfoil that has a...Ch. 17 - Prob. 17.30PPCh. 17 - Prob. 17.31PPCh. 17 - Prob. 17.32PPCh. 17 - Prob. 17.33PP
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- A jet flying at 100m/s banks to make a horizontal circular turn. The radius of the turn is 3810m, and the mass of the jet is 2.02x10^5kg. Calculate the magnitude of the necessary lifting force.arrow_forwardAn anemometer mounted on the nacelle of an operating downwind propeller type turbine measures an average wind speed of 10 m/s. Estimate the undisturbed wind speed, assuming this anemometer measures the same wind speed as seen by the propeller.arrow_forwardCalculate the power of the wind at a site that has wind speed of 12 m/s, air density of 1.2 kg/m3. The wind turbine at the site has a rotor diameter of 180 m. What is the maximum power that can be delivered by the wind turbine? (Assume π=3,14)arrow_forward
- Assume the gross weight of the airplane is 600 lbs, what would be a reasonable estimate of its wing loading. *Use significant assumptions and solve this for propellers andjets.arrow_forwardA small, fast boat has a specific resistance ratio of 0.06 (see Table 17.2) and displaces 125 long tons. Compute the total ship resistance and the power required to overcome drag when it is moving at 50 ft/s in seawater at 77°F.arrow_forwardIf a double-acting air cylinder with a 40-mm diameter bore and 200-mm stroke operates at 7000 kPa gage and cycles at 30 cycles /min , how long will it take to consume 100m3 of free air? (Assume the rod diameter is negligible and there is no change in the temperature of the air.arrow_forward
- A delivery vehicle carries a long sign on top, as in Fig.. If the sign is very thin and the vehicle moves at65 mi/h, (a) estimate the force on the sign with no crosswindand (b) discuss the effect of a crosswind.arrow_forwardA wheel tractor has a 200HP engine.if it is operating at an altitute of 1000m above sea level, at an average temperature of 25 degree celcius, and at an average speed of 12km/hr. Calculate the available rimpull of this tractor. Take rimpull efficiency as 85%arrow_forwardA twin-engine jet aircraft is climbing at a 10 degree angle, measured from the vertical, at 260 ft/s. The thrust developed by an engine is 1000 lb. Calculate the power developed by the whole aircraft.arrow_forward
- A jet of water issues out from a nozzle fitted at a height of 4m from the ground at an angle of 45 degrees with horizontal. The jet under a particular flow condition strikes the ground at a horizontal distance of 15 m from the nozzle. air resistance =0 . compute: a) jet velocity b) maximum height of the jet can reach and maximum horizontal distance from the nozzle.arrow_forwardCalculate the maximum speed with which water at atmospheric pressure can flow past an obstacle without breaking into turbulent flow. Use Bernoulli’s principle and neglect viscous drag.arrow_forwardThe average wind speed at a proposed HAWT wind farm site is 12.5 m/s. The power coefficient of each wind turbine is predicted to be 0.41, and the combined efficiency of the gearbox and generator is 92 percent. Each wind turbine must produce 2.5 MW of electrical power when the wind blows at 12.5 m/s. (a) Calculate the required diameter of each turbine disk. Take the average air density to be ? = 1.2 kg/m3 . (b) If 30 such turbines are built on the site and an average home in the area consumes approximately 1.5 kW of electrical power, estimate how many homes can be powered by this wind farm, assuming an additional efficiency of 96 percent to account for the powerline losses.arrow_forward
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