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the two particles A and B start at the origin O and trevel in opposite directions along the circular path at constant speeds va =.7 m/s and vb =1.5 m/s . Determine the time when they collide and the magnitude of the accelerartion of b
A particle is traveling along a circular curve having a radius of 13 m. If it has an initial speed of 21m/s and then begins to decrease its speed at the rate of at = (-0.25s)m/s2
The National Institute for Occupational Safety and Health (NIOSH) sets standards for CCl4 in air at 12.6 mg/m^3 of air (a time average over 40 hr). The CCl4 found in a sample is 4800 ppb. Does the sample meet the NIOSH standard
Ends A and D of the two solid steel shafts AB and CD are fixed, while ends B and C are connected to gears. Knowing that a 4-kN(m) torque T is applied to gear B, determine the maximum shearing stress (a) in shaft AB, (b) in shaft CD.
A cylindrical water tank is suspended vertically by its sides. The tank has a 10-ft diameter and is filled with 20 degree celcius water to a 3-ft depth. Determine the force exerted on the tank bottom
a rectangular clarifier with a length:width ratio of 3:1 receives a flow of 850m3/day. the clarifiers depth is 4.0m and the detention time of the water inthe clarifier is 2.4 hrs, what are the surface overflow rate and the horizontal flow through ..
After initial mixing, the DO concentration in the river is 9.5mg/L and the temperature is 15ºC. If the ultimate BOD of the mixed river water is 30mg/L,
A floor is to be supported on hardwood timber joists that are spaced at 0.5m centres and span 5.0m. The joists support flooring 20mm thick and an applied live load of 2kN/m2 Design a typical joint 50mm wide
The sand particles range in diameter from 0.04 to 2.0 mm with a specific gravity of 2.65. The wastewater discharge rate is 1400 m3 /d at 20°C. Design a settling tank to remove all the metal and sand particles.
Finally, the wreckage is removed, and the freeway is restored to full capacity (4000 veh/h) at 8:31 a,. Assume D/D/1 queuing to determine time of queue dissipation, longest queue length, total delay, average delay per vehicle, and longest wait of ..
find the inertia tensor about the origin for a mass of uniform density=1,inside the part of the unit sphere where x>0,y>0,and find the principal moments of inertia and the principal axes.
A concrete mix with a 3-inch slump, w/c ratio of 0.50, and sand with a fineness modulus of 2.4 contains 1700 lb/yd^3 of coarse aggregate. Compute the required weight of coarse aggregate per cubic yard.
In addition to performing the cut-and-fill operations, the contractor needs to excavate the entire building footprint to a depth of 8 feet for a basement construction made of concrete masonry perimeter walls supported by 2'-0" X 0'-10" continuous ..
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