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1.A soil has a total density of 1.80 Mg/m3. When fully dry, the soil has a density of 1.59 Mg/m3. The specific gravity of the solids is 2.57. Find the following soil parameters:
a) Dry unit weight of the sample
b) Natural water content
c) Porosity
d) Degree of saturation
e) Saturated unit weight
A circular hatch is located in a sloping wall of a water-storage reservoir, where the wall slopes at ? = 35° to the horizontal, the radius of the hatch R is 840 mm, and the center of the hatch yC is 3 m below the water surface (measured along the slo..
You are designing an underwater maintenance schedule for an offshore oil rig. The divers work at a depth of 15 m and the seawater density is 1027 kg m-3. They are known to consume 130 litres of air at the ambient temperature is 10oC over the time tak..
vehicle manufacturer is considering an engine for a new sedan (Cd=0.34, Af=22ft^2). the car is being designed to achieve a top speed of 100 mi/h on a paved surface at sea level (p=0.002378 slugs/ft^3).
Assume a hydrostatic condition in a cubic tank with 64ft length, 32ft width and 16ft height. The tank is filled with 15ppg( pounds per gallon) fluid. Calculate the pressure in psignat the bottom of the tank.
Total energy (E) of a projectile is the sum of its kinetic and potential energy: E= 1/2 mV^2 +mgz where m is mass of projectile, V is speed, g is gravitational constant and z is height. 5.0 kg object, dropped from rest (V=0 at time t=0) what will spe..
A reservoir cover is 12,000 acres and is 20 feet thick. The formation has initial porosity of 0.25. The pore volume compressibility of the reservoir rock is 3.0 x 10^(-6) psi^(-1) . Calculate the change in reservoir pore volume (in barrels) if the re..
A fluid flowing in a pipe 30cm in diameter has a uniform velocity of 4m/s. The pressure at the center of the pipe is 40KPa, and the elevation of the pipe's centerline above an assumed datum is 4.5m. Compute the total energy per unit weight of the ..
For a brittle material that has a specific surface energy of 0.26J/m2, and flexural strength and elastic modulus valuesof 76.6 MPa and 64 GPa, respectively, calculate the critical stressrequired for the propagation of a surface crack of length 0.05 m..
The u-tube manometer has legs of unequal internal diameter d1 and d2, which are partially filled with immiscible liquids of density1, and density2 respectively and which are open to the atmosphere at the top.
The truss is to be constructed of members with equal cross-sectional areas and using a material with yield stress 700 MPa. The structure must be designed to support a mass (m) of 3400 kg with a factor of safety of 3.
A machine has an initial cost of $10,000. Its market value declines by 20% annually. The repair costs are covered by a warranty in year 1, and then they increase $600 per year. The firm's MARR is 15%.
How do the concepts of green design, industrial ecology, and sustainable developement differ from past approaches to engineering design Prepare a brief report on this topic using some specific examples for illustration.
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