A student wants to estimate drag force on a golf ball of diameter D moving in air at a speed of U at atmospheric conditions. The student has access to a wind-tunnel and develops a replica of the ball that is 5 times smaller in diameter sets the wind speed 5 times larger than the actual golf ball. Compared to the force on the replica, the estimated drag force on the actual golf ball will be

Q: 2. A 0.10 cm-radius sphere falling in air (T= 20°C) at a speed of 25 m/s. Determine the following:…

A: Given  radius of sphere (r) =.10 cm  Terminal velocity (v)=25 m/s density of Air ρ =1.2 kg/m3…

Q: A billboard with length (P) and width (L) is exposed to air gusts at speed (V) Create a…

A: Given that, Length of billboard =PWidth of billboard=LSpeed of wind=V Let the drag force on the…

Q: Draw the diagram of the dimensionless velocity profile and 11 for the boundary layer on the surface…

A: To discuss the dimensionless velocity profile in a boundary layer under a pressure gradient, we need…

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

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Q: 7.21. A model of a thin streamlined body is placed in a flow for testing. The body is 0.9 m (3 ft)…

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Q: 2) A prototype ship is 50 m long and designed for cruising speed of 10 m/s. The drag is to be…

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Q: aerodynamic derivative X, may be determined from the following expression: X =-pU SCD %3D nere pis…

A: Answer is given below:

Q: From the laminar boundary layer the velocity distributions given below, find the momentum thickness…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: If the model is 2 times larger and its velocity is 6.25 larger than the prototype, what will be the…

A: Given:The model is  larger than the prototype, The model velocity is  larger than the prototype…

Q: From a low pressure-center the pressure increases by 1 kPa eastward across a distance of 1000 km.…

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Q: A(1/5) scale model automobile is tested in a wind tunnel with the same air properties as the…

A: This problem is related to the model and prototype similitude. the similitude is defined as the…

Q: Required information The helium-filled balloon in the image is tethered at 20°C and 1 atm with a…

A: Given Temperature T= 20 0c String is negligible mass and drag diameter of the balloon d =58 cm =0.58…

Q: Q4. Consider an aircraft flying in straight and level flight with total wing area 110 m², wing…

A: Apply the energy equation for rising flight in order to determine the climb rate that the aircraft…

Q: A 1:8 scale tractor model is tested in a pressurized wind tunnel. The width, height and length of…

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Q: 1. Suppose you are flying a 7,784 kilograms aircraft at 14,630 meters where the air density is…

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Q: The drag equation of an aircraft is given by the equation: Cp = 0.025 + 0.035 CZ The weight of the…

A: Given dataW=120kNA=32m2F=12kNUsing the Drag relation then equation to find speed

Q: Derive the expression for the drag on a submerged torpedo. The parameters are the size of torpedo,…

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Q: 6- A 10-m-diameter rotor for a wind turbine is to be designed for use in an area where the…

A: QND3= constantflow is directly proportional to area of approach , since wind characteristic speed is…

Q: A blimp is approximated by a prolate spheroid 90 m longand 30 m in diameter. Estimate the weight of…

A: Given Data: The length of blimp is L = 90m. The diameter of blimp is D = 30 m. Temperature of blimp…

Q: The drag equation for the Gofaster 172 is: D = 0.0003v2A. D is drag in pounds; v is airspeed in…

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Q: The mass of a car is 1.50\times 103 kg. The shape of the car's body is such that its aerodynamic…

A: Given datamass of car, m = 1.5103 = 154.5 kgdrag coefficient, C = 0.330frontal area, A = 2.5…

Q: The drag polar equation of a light airplane in clean configuration can be written as Cp = 0.358 +…

A: The drag equation, CD = 0.358 + 0.0405CL2The weight, W = 18681 NThe wings area, A = 14.41 m2

Q: Inside a ship building R&D center, a model of a ship was to be put under experimental analysis, for…

A: A ship-building R&D center-Length ratio Lm/Lp=1/25The speed of the actual full-scale ship is…

Q: To maintain a constant speed, the force provided by a car's engine must equal the drag force plus…

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Q: Calculate the velocity a spherical rain drop would achieve falling from 5.00 km: (a) in the absence…

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Q: The drag equation for the Gofaster 172 is: D = 0.0003v2A. D is drag in pounds; v is airspeed in…

A: For the solution refer below images.

Q: Assuming air resistance with drag ratio =0.50 find the terminal velocity for an object, initially…

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Q: A baseball is thrown directly upward (in z direction) from the ground (z = 0) with some initial…

A: When a baseball is thrown vertically upward with initial velocity then it goes up to a certain…

Q: 3. What would be the change in drag force exerted on a spherical spacecraft (Diameter-5m) travelling…

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Q: You are designing an airfoil for a new hobby RC plane.  Because of your limited knowledge, you have…

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Q: desired to equip this airplane with turboprop engines with available power such that a maximi 602.6…

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Q: Skydiver Luke jumps with his parachute of diameter D = 12m out of an airplane. The combined mass of…

A: Given : m=100 kg D=12 m Cd = 1.4 To find : Time taken to fall between 3000 m to 2000 m

Q: An ongoing research to investigate the unsteady aerodynamics of insect flight is being conducted at…

A: Given:T=fU,c,f,A,Ω,αo,ρ,μ

Q: A small, axisymmetric, low-speed wind tunnel is built to calibrate hot wires. The diameter of the…

A: At 60°F The properties of air ρ=0.07489 lbm/ft3μ=1.23×10-5 lbm/ft.s The speed of air, v=5 ft/s…

Q: An aircraft has a wing area of 70 m2 and a wing loading of 2500 N/m². The air density could be taken…

A: Given data: Write the relation between coefficient of drag and lift. Compare equation (1) with the…