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The Earth's surface creates a boundary layer in the atmosphere. The velocity profile near the surface can be expressed as a power law, u = a * y n, where the constants a and n depend on the roughness of the surface. Typical values for a flat surface (such as a hard ground or an ocean) are a = 8.00(ft^0.9)/s and n = 0.10, while values for a forested area with trees a = 1.43(ft^0.65)/s and n = 0.35. Make a table of values for both surfaces of the velocity profile from the surface (y = 0 ft) to y = 1000 ft at 100 ft intervals. Plot the values on a graph of u versus y. (Make sure to show how to reduce all of your units.)
Discussion on how sustainability and green engineering can be integrated in the four components of materials science and engineering?
The soil properties of the clay are Cc = 0.25, Cr = 0.05, gsat = 18 kN/m 3 , for the sand gsat = 18 kN/m 3 , and the water table is 2 m below the soil surface. Determine the settlements when a stress of 100 kPa is applied by the building over an a..
A pipe 1ft in diameter bends through an angle of 135 degrees. The velocity of flow of gasoline ( S = 0.8) is 20ft/s and the pressure is 10psig in the bend. What external force is required to hold the bend against the action of the gasoline
A 600 mm long solid steel shaft is to transmit a torque of 30 N-m, G=90 GPa, diameter 15mm. Determine (a) Maximum shear stress, and (b) Angle of twist (phi) at the end.
the flow profile is such that u=u(max)*(1-(r/R)^2) where u is the flow speed and r is the distance from the centre of the pipe in the radial direction. What is the shear stress on the pipe wall What is the shear force exerted by the oil on a 1m lo..
The modulus of elasticity of the wood is 13GPa. If one side of the column is 25cm across, find the minimum dimension of the other side to keep the column's deformatin under 1.3 mm
the structure has a curved face being part of a circle with radius R = 32M. The dam holds water to a height = 28 m. Claculate the magnitude and direction of the resultant force per metre length of the dam wall
The break up of a liquid jet into droplets of diameter d depends on the jet diameter D, the jet velocity V, viscosity Mu, density rho,and surface tension sigma.
Briefly explain the purpose of the International Space Station, and list the name of all space agencies involved in building and operating it.
The pollutant has a reaction rate coeeficient k of 0.25/day. Assuming is pollutant is well mixed in the lake, find the steady-state concentration of pollutant in the lake.
The coefficients of kinetic friction between the blocks and the inclined plane are a=0.1,b=0.3. Neglect the mass of the link. Angle between the inclined plane and the surface is 30 degree.
a storage tank has a diameter of 80 ft, a height of 25ft and contains oil to a height of 15ft. the suction pumps, which can handle 15000bbl/d, are started, but the safety valves are clogged and a vacuum is drawn in the tank.
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