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Three cables (AD, BD and CD) are used to hang a circular disc. The radius of the disc is 50 cm and it has a weight of 500 N. Draw a free body diagram and determine the force in each of the cables, AD, BD and CD using vector analysis. Write these forces in Cartesian form as well.
Diesel fuel has an average chemical formula of C12H23 and a density of 6.45 lb/gal. Calculate how many lbs of CO2 are produced per gallon of diesel burned (assume complete combustion).
A 500 lb flywheel is shown. A 100 lb block is held by a light cable wrapped around the hub of the flywheel the radius of which is 2 ft. If the system is released from rest and the weight has a velocity of 11 ft/sec after 5 s
An alloy has a yield strength of 41 ksi, a tensile strength of 57 ksi, and an elastic modulus of 16 X 10^6 psi. A cylindrical specimen of this alloy 0.5 in in diameter and 10 in long is stressed in tension and found to elongate 0.3 in.
The floating platform is supported at each corner by a hollow sealed cylinder 1 m in diameter. The platform itself weights 30kN is air, and each cylinder weighs 1.0kN/meter of length.
Design a cord (design the constants k and ) so the cord stretches 2.5 times the unstretched length, and the acceleration of the jumper doesn't exceed 3g, and the cord has zero stiffness at the bottom of a 400ft drop.
a solid wooden cube (.5*.5*.5 m^3) is floating in water and 0.2 of the cube extends above the water surface. Determine the specific weight of the wood.
A developer has requested permission to build a large retail store at a location adjacent to the intersection of an undivided four-lane major road and a two-lane minor road. Traffic on the minor road is controlled by a stop sign.
The temperature was 200C, and the void ratio (e) of the soil was 0.43. Calculate the "Coefficient of Permeability" in "centimeters per second" (Given, k = (QL)÷(A Δh t)).
Air enters an adiabatic compressor at 100 kPa and 17 degrees C at a rate of 2.4 m^3/s. It exits at 257 Degrees (C). The compressor has an isentropic efficiency of 84%. Neglecting the changes in kinetic and potential energy
The pavement structure consists of 160 mm of hot-mix asphalt (HMA), 150 mm of granular base and 450 mm of subbase placed over silty clay subgrade. The pavement is 20 years old and its current PCI is 50.
When working with flow through pipes , engineers typically have to determine if the flow is laminar or turbulent. Compute the Reynolds number for each of the cases below and determine if the flow is laminar or turbulent. Assume all of the conduits..
A civil engineer used a 30-m tape in measuring an inclined distance. The measured length on the slope was recorded to be 459.20 m long. The difference in elevation between the initial and the end point was found to be 1.25 m.
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