Assuming Stoke’s Law applies, a. Calculate the velocity of a 1.8 cm NaCl particle (S.G = 2.16) falling in water (viscosity is 1.1 cP). b. Calculate the drag force and drag coefficient for this particle.
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Assuming Stoke’s Law applies,
a. Calculate the velocity of a 1.8 cm NaCl particle (S.G = 2.16) falling in water (viscosity is 1.1 cP).
b. Calculate the drag force and drag coefficient for this particle.
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- 3.) Automotive engineers work very hard to improve the value of the drag coefficient for cars. Suppose you have a car with a mass of 3000. kg and an effective surface area of 4.00 m^2. The engine can generate a maximum force of 28,000. N. Let the coefficient of kinetic friction be 0.200, and the coefficient of static friction be 0.400. Air has a density of 1.21 kg/m^3. (back on earth) (3a) Draw a free-body diagram for your car, including both drag and friction, when the car is moving at its maximum velocity. (3b) If the maximum value of your car's velocity is 150.0 m/s, then what is the drag coefficient for the car? (3c) Suppose your engineers change the drag coefficient to 0.300 - what would be your maximum velocity then with the same force from your engine.Question 21 The drag on a moving object, at a fixed speed, is measured to be 24 N. Assuming that the nature of the flow around the object does not change, what would the drag be if the object's speed increased by 1296 ?ad/quiz/attempt.php?attempt%3D173629 O e 832.56000 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, an 8-cm- diameter sphere has a measured drag of F=164.7 N. What will be the drag force on a 1.5-m-diameter weather balloon moored in sea-level standard air (density of 1. 2255 kg/m3 and viscosity of 1.78E-05 kg/m s) under dynamically similar conditions? ered 3.00 tion Select one: O a 108.58506 Ob. 42.70506 Oc. 141.52506 Od. 75.645063 Oe. 9.76506 The uniform 5-m-long round wooden rod is tied to the bottom by a string. find the tension in the string. The fluid specific gravity S=0.7. ed 00 on D=8 cm Fluid D
- 1. The given information is as follows: Cd=1.4 (coefficient of drag) ¥=10 ft/sec (velocity) Ƴ=62.4 #/ft3 g=32.3 ft/sec2 a. What is the water pressure in PSF against the obstruction? b. If the pier is 6 ft wide and 14 ft deep, what is the Resultant Pressure on the WHOLE obstruction? c. If the obstruction is fixed into the bottom of the river (mud line), what is the bending moment at the mudline on the obstruction?Which of the statements/is/are true concerning the friction factor for solid spheres and cylinders immersed in a flowing fluid? I. Such friction factors are traditionally referred to as (dimensionless) drag coefficient denoted by CD. II. At Reynolds number much as less than 1, the relationship CD=24/Re is valid and CD is inversely proportional to Re. III. The characteristic area A* used in the definition of these friction factor is the surface area of the object. Statement I only Statement II only Statement III only Statement I and II only All three statements are trueq: An aircraft is flying straight and level at a certain altitude with a velocity of 214 fps. Determine the power required if the wing area is 115 ft? and the total drag coefficient is 0.067. Assume SSLC (p=0.002377 slug/ft3). Provide answer in ft-Ib/s. and round off to the nearest whole number. Solve using standard English units.
- 8.) A circular cylinder 4m long and 3m in diameter is in an air stream. The flow velocity is 5 m/s L parallel to the axis of the cylinder. Given that the coefficient of drag, CD on the cylinder is 1.3, and the density of air is 1.225 kg/m3. What is the force on the cylinder? A. 0.090 KN B. 0.14 KN C. 0.24 KN D. 0.91 kN2. A 0.10 cm-radius sphere falling in air (T= 20°C) at a speed of 25 m/s. Determine the following: a) Skin drag force b) Form drag force c) Total drag force. 3. The raindrops of around 3 mm diameter fallat 5 mis, while drizzle with droplets of 0.3 mm diameter falls at 1.5 m's. what is the terminal velocity of such raindrops and terminal velocity of the drizzle?Review ConstantS In the vertical jump, an athlete starts from a crouch and jumps upward to reach as high as possible. Even the best athletes spend little more than 1.00 s in the air (their "hang time"). Treat the athlete as a particle and let ymax be his maximum height above the floor. Part A To explain why he seems to hang in the air, calculate the ratio of the time he is above ymax/2 (moving up from ymax /2 to ymax and then moving down to ymax/2) to the time it takes him to go from the floor to that height. Ignore air resistance. ΑΣφ. ?
- 1. An airplane weighs 36,000 lb. and has a wing area of 450 fte. The drag equation is C, =0.014 + 0.05C} . It is desired to equip this airplane with turboprop engines with available power such that a maximum speed of 602.6 mph at sea level can be reached. The available power is assumed to be independent of flight speed. Calculate the maximum rate of climb and the speed at which it occurs. Given: W = 36,000 lb S = 450 ft² C, = 0.014+0.05C V = 602.6 mph max THPy = cons tan t THP AV constant Max EHP Point of THP, REQD. Flisht Speed. V Vmax 602.6 mph Required: Max R.C. and Vmax R.C. Horsepower, hpExplain the mechanism of drag and lift force generation for the wing using Newton's law. Here are the hints : If the wing does not exist, the velocity distribution is uniform at v=U_inf. Therefore, the x-directional velocity of the air is deceralated by the wing. This implies that the wing applied a force in the -x-direction to the air (Newton's second law). In other words, the air flow applied a force in the x-direction to the wing (Newton's third law). This is the mechanism of drag generation.#4 1.11 For a small particle of styrofoam (1 lbm/ft) (spherical, with diameter d = 0.3 mm) falling in standard air at speed V, the drag is given by FD-3mVd, where is the air viscosity. Find the maximum speed starting from rest, and the time it takes to reach 95 percent of this speed. Plot the speed as a function of time. s) Answer: (Vmax=0.0435",t=0.0133 S