A long, slender, smooth 3-cm-diameter flagpole bendsalarmingly in 20 mi/h sea-level winds, causing patrioticcitizens to gasp. An engineer claims that the pole will bendless if its surface is deliberately roughened. Is she correct,at least qualitatively?

Q: A vertical air stream flowing at a velocity of 100 m/s supports a ball of 60 mm in diameter. Taking…

A: Given data,  V= 100 m/s,  D=60 mm= 0.06 m  ρ=1.2 kg/m³  v= 1.6 stokes  Cd= 0.8

Q: The parachute in the chapter-opener photo is, of course,meant to decelerate the payload on Mars. The…

A: The image of the parachute is not given in the problem. Let's consider the diameter of the parachute…

Q: A ship is 150 m long and has a wetted area of 5000 m2. If it is encrusted with barnacles, the ship…

A:

Q: A fishnet consists of 1-mm-diameter strings overlappedand knotted to form 1-by-1-cm squares.…

A: The properties of sea-water at 20 degrees Celsius are: Also, let us consider that the value of the…

Q: Q 3. A submarine of length 160 m, average diameter of 15 m moves through seawater with kinematic…

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Q: A smooth wooden sphere (SG = 0.65) is connected by athin rigid rod to a hinge in a wind tunnel, as…

A: Consider the free body diagram of the ball and rod system as shown below. Here, The coefficient of…

Q: The centerboard on a sailboat is 3 ft long parallel to theflow and protrudes 7 ft down below the…

A: Given data: *The length of the sailboat is l=3 ft=0.9144 m. *The length protrudes down below the…

Q: A wind stress of 0.2 N m-2 blows over an initially stationary freshwater lake, 20 km long, and moves…

A: Shear stress acts tangentially to the surface. Turbulent flow  is that type of flow in which the…

Q: Consider two pressure taps along the wall of a laminar boundary layer as in Fig. The fluid is air at…

A: Write the assumption of the flow. The flow is steady, incompressible, and laminar. The boundary…

Q: Chapter 4 1. Solve for parsite drg with air denaity 9, velocity 10 KIAS, Car13, urface area 174 2…

A:

Q: A 30 cm diameter cork ball (S=0.21) is tied to the bottom of a river as shown. (a) Draw the free…

A:

Q: For creeping flow over a three-dimensional object, the aerodynamic drag on the object does not…

A: Creeping flow is also known as Stokes Flow. Drag is the resisting force acting in the opposite…

Q: Consider wind at 20°C and 1 atm blowing past a chimney30 m high and 80 cm in diameter. If the…

A: Given: The height of the chimney is H=30 m The diameter of the chimney is D=80 cm The bending moment…

Q: A propeller driven aircraft has the following parabolic non-dimensional drag curve: CD = 0.015 +…

A:

Q: A heavy sphere attached to a string should hang at an angleθ when immersed in a stream of velocity…

A: Given, U = 40 m/s diameter (d) = 3 cm = 0.03 m Specific Gravity of steel = 7.86  Freebody diagram,…

Q: Wind at 20°C and 1 atm blows at 75 km/h past a flagpole18 m high and 20 cm in diameter. The drag…

A: Given data

Q: Worked Example 3. A particle 1 mm diameter and density 1.1x10 kg/m' is falling freely from rest in…

A: Given data: Diameter of the particle (d) = 1 mm Density of the particle (ρ) = 1.1*103 kg/m3 Density…

Q: The 2013 Toyota Camry has an empty weight of 3190 lbf, a frontal area of 22.06 ft2, and a drag…

A: Write the given value using suitable variables. Here W signifies Camry weight, A signifies frontal…

Q: Air at 20°C and 1 atm flows at 2 m/s past a sharp flat plate.Assuming that Kármán’s…

A:

Q: A flying wing weighing 20,000 N has a NACA 65‐418 airfoil section, an area of 30 m2, and an aspect…

A: Given Data The weight of the plane is: W=20000 N The area of the plane is: A=30 m2 Aspect ratio is:…

Q: Assume the stabilizer of an airplane is a flat plate. If the transition /critical RN 750,000, what…

A:

Q: A spherical raindrop that is D= 1/8 inch in diameter falls through the air at sea-level. a) If the…

A: As per the guidelines, we have to solve the first three sub-parts. (a) The weight of the rain drop…

Q: To measure the drag of an upright person, without violatinghuman subject protocols, a life-sized…

A: Write the given data: pair=1.2 kg/m3L=6 mN=80 rpmP=60 kW=60000W1000 W1 kW

Q: A freshwater boat of mass 400 kg is supported by a rectangularhydrofoil of aspect ratio 8, 2 percent…

A: Given data: Velocity of the boat, V = 7 m/s Aspect ratio, a = 8 (therefore b = 8C) Angle, α = 2.50…

Q: Fluid Mechanics problem: A pickup truck has a clean drag area CDA of 35 ft2. Estimate the…

A: Given data: The drag force relation can be expressed as, Here ρ is the density of the fluid, in…

Q: For a laminar boundary layer growing on a horizontal flat plate, the boundary layer thickness ? is…

A: The expression for the boundary layer growing over the horizontal plate for laminar flow is:…

Q: In a strait jump line, one of the jumping poles is 130 m high and the other 170 m high. How can the…

A:

Q: An aluminum cylinder weighing 30 N, 6 cm in diameterand 40 cm long, is falling concentrically…

A: Given: The weight of the cylinder is w= 30 N. The diameter and length are D= 6 cm=0.06m and L=40…

Q: A light aircraft flies at 30 m/s in the air at 20°C and 1 atm.Its wing is a NACA 0009 airfoil, with…

A: (a) Calculate the Reynolds number for the flow based on the chord length. Rec=ρUcμ Here, c is the…

Q: When tested in water at 20°C (density of 998 kg/m3 and viscosity of 0.001 kg/m.s) flowing at 2 m/s,…

A: Given,

Q: P3.48 The small boat is driven at steady speed Vo by compressed air issuing from a 3-cm-diameter…

A:

Q: A minivan is pulled by a tow truck at 60 kph. The boxlike van is 20m long, 6m high, and 3.75m wide.…

A: Given   Velocity, v = 60 km/h = 16.67 m/s    Length, L = 20 m       Density =  0.0023 kg/m3…

Q: NACA 664-221 Chord c = 150 cm 1) What is the CL range to achieve the minimum coefficient of drag? 2)…

A: NACA 664-221 Its a 6 series aerofoil 1st digit '6' - 6 Series aerofoil 2nd digit 6 -clockwise…

Q: Air equivalent to one of a standard height of 4000 m flows at 450 mi/h over a wing with a thickness…

A: Given, Velocity = V = 450 mi/h = 201.17 m/s Altitude = h = 4000 m Thickness = t = 18 cm = 0.18 m…

Q: Q 6(c) In your own words and using diagrams explain how lift is generated on a wing. Q 6(d) Estimate…

A: Lift force Lift force is a component of force perpendicular to the flowing fluid.   Drag force Drag…

Q: A spherical raindrop that is D= 1/8 inch in diameter falls through the air at sea-level. a) If the…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you.…

Q: A hydrofoil 0.366 m long and 1.82 m wide is placed in a water flow of 12.9 m/s, with p = 1025.3 kg/m…

A: Dimensions of hydrofoil, Length, L=0.366m and width, W=1.82m  Free stream velocity, U0=12.9m/s…

Q: A tractor-trailer truck is coasting freely, with no brakes,down an 8° slope at 1000-m standard…

A: Given data: The slop is θ = 8o. The standard altitude is h = 1000 m. The rolling resistance for…

Q: A hydrofoil 50 cm long and 4 m wide moves at 28 kn inseawater at 20°C. Using fl at-plate theory with…

A: Given, L = 50 cm = 0.5 m b = 4 m V = 28 knots = 14.4 m/s T = 20°C Re = 5 x 105 ε = 0.3 mm

Q: The 2013 Toyota Camry has an empty weight of 3190 lbf,a frontal area of 22.06 ft2, and a drag…

A: Given ,Weight of the Vehicle  W = 3190 lbfFrental Area       A = 22.06 ft2Rolling Resistance  Crr =…

Q: An aluminum cylinder weighing 30 N, 6 cm in diameter and 40 cm long, is falling concentrically…

A: Given that, Calculate the clearance between the diameter of sleeve and aluminum cylinder

Q: Consider a steel sphere (SG = 7.85) of diameter 2 cm,dropped from rest in the water at 208C. Assume…

A: The drag coefficient is CD=0.47. The diameter of the steel sphere is d=2 cm×1 m100 cm=0.02 m

Q: Two baseballs of diameter 7.35 cm are connected to a rod7 mm in diameter and 56 cm long, as in Fig.…

A: Given data: The diameter of baseball, db = 7.35 cm. The diameter of the rod, dr = 7 mm. The total…

Q: When tested in water at 20 ° C fl owing at 2 m/s, an 8 - cmdiametersphere has a measured drag of 5…

A: Given data V=2 m/secρw=998 kg/m3μw=1×10-3 pa·sec For prototype dp=1.5 mρa=1.2 kg/m3μa=1.8×10-5…

Q: Consider a rectangular wing with NACA O009 airfoil section spanning the test section of a wind…

A:

Q: b) When tested in water at 20°C flowing at 2 misAlan 8 cm diameter sphere has a measured drag force…

A:

Q: Icebergs can be driven at substantial speeds by the wind.Let the iceberg be idealized as a large,…

A: Drag force due to water is FDw=CDw12ρwAV2 Drag force due to air is FDa=CDa12ρaAU-V2 By taking the…

Q: Assume the stabilizer of an airplane is a flat plate. If the   transition /critical RN 750,000, what…

A: