4. The Reynold's number of a sphere falling in air is 1x10^6. If the sphere's radius is 1 ft, what is its velocity? (p = 0.00234 slug/ft3, uair = 3.8x10-7 lbf-s/ft2).
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- #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 SElijah Reaper joins the volunteer fire department. Out practicing his fire hose prowess one day, he attempts to master stabilizing his body while blasting water. He holds the spray nozzle perfectly horizontal, 2 meters up from the ground, and its diameter is 10 cm. He finds that his body and strength can only withstand a moment about his feet of 50 Nm to continue holding the hose securely. What is the maximum volumetric flow of water (m3/sec) that the hose can spray for him to remain standing?Suppose there is a triangle-shaped window installed vertically on the side of a city under the ocean. Assume that the bottom of the triangle is 2,000 ft below the surface of the water. The density of sea water is 63.93 pounds per cubic foot. The top of the triangle is 10 ft wide, and the triangle is 5 feet tall and is symmetrical about its middle. Refer to the drawing below: Find the fluid force on the window due to the ocean. 10 5
- 1. A special-purpose piece of laboratory glassware, called a pyncnometer; is used to measureLiquid densities. It has a volume of 25 cc, and a mass of 17 .24 g when it is full of air. Whenfilled with a liquid of unknown density, its mass = 45.00 g. What is the density of this liquid?How large an error do we make if we ignore the mass of the air that was in it when we weighed itand found m = 17.24 g?1. The density of an oil is 850 kg/m3. Find its relative density (or specific gravity) and Kinematic viscosity if the dynamic viscosity is 5 x 10-3 kg/ms. 2. If the viscosity of water at 70 °C is 0.00402 poise and its specific gravity is 0.978 determine its absolute viscosity in Pa-s and its kinematic viscosity in m²/s and in stokes 3. Calculate the Reynolds number, Re for water flow in a circular pipe. The diameter of the pipe is 50 mm, the density of water is 998 kg/m³, the volumetric oil flowrate is 720 L/min, and the dynamic viscosity of water is 1.2 centipoiseA submarine is traveling at a depth of ‘95’ kilometers in the ocean, where the gagepressure is 840 Kg(f)/cm2 . The density and bulk modulus of elasticity of water at the top surface of the ocean are 1025 kg/m3 and 24000 kg(f)/cm2 respectively. Find the following:(i) What will be the density of water at the depth of 2.0 kilometers?(ii) What will be specific volume and change of volume at that depth?(iii) What is the pressure at the top surface of the submarine? How much will bechanged in pressure if submarine change direction from North to East?
- 5) A cylindrical bucket 150 mm in diameter and 200 mm high contains 150 mm of water. A boy swings the bucket on a vertical plane so that the bottom of the bucket describes a circle of radius 1 m. how fast should it be rotated so that no water will be spilled? Answer: 31.13rpm Subject: Fluid Mechanic Lesson: Relative Equilibrium of Liquids Fundamentals of Fluid Flow%or l. ln. . o [Template] exami.. -> Ministry of Higher Education & Scientific Research Tikrit University College of Engineering Mechanical Engineering Dept. Class : 2nd year Subject: Principles of Fluid Mechanics Time: 1:15 hrs Date: 11/3 / 2021 Final Exam 2020-2021 Q1:-The gate AB as shown in fig.1 has long 1 m and wide 0.9 m .Find the force Fon The gate AB and also find the centre of pressure X 8 m 3 m Oil S-0.81 7 m Fig.1 Q2:- A wood cone floats in water in the position shown in fig.2.The specific gravity of the wood is 0.6.Would it be stable? D7m Fig.2 Water By Asst.Prof.Dr.Muhammad A.Eleiwi II >Fifteen gallons of hydraulic oil weigh 108.7 lb. What is the specific weight γ in units of lb/ft3? Select all that apply. (Note: 1 gal = 0.1337 ft3)
- The absolute viscosity of the liquid is 1.18 x 10^-3 Pa.s and its specific gravity is 0.90. Compute the equivalent kinematic viscosity in m2/s. CCompute the equivalent value in stokes. If the viscosity is 0.0126 strokes, what is the equivalent kinematic viscosity in m2/s?Here are these questions if I could get help with themIf a spherical storage tank holds 40,000 gallons (120,000 liters) of water,what diameter must it have?If a cylindrical storage tank has a 40-foot (12 m) diameter circular 05::=how high must it be to hold 1 million gallons (3 million liters)?If water is moving at a rate of 3.2 ft3/sec (90,000 cc/sec), how manygallons (liters) per minute is this?If the specific gravity of gold is 19.0. what is the weight of a cubic inch(cubic centimeter) of gold? A cubic foot (cubic meter)?A tidal barrage is in the shape of a quarter cylinder of radius r=16m, as shown in the picture above. If the barrage is 13m wide and holds back water of density 1014kg/m³ to its full height, what is the magnitude of the vertical force on the barrage? Assume that the atmospheric pressure is constant. Give your answer in Kilo Newtons to the nearest whole number. Use an acceleration due to gravity of g=9.81m/s²