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An elevator ascends with an upward acceleration of 1.75 m/s^2. At the instant its upward speed is 2.0 m/s, a loose bolt dropsfrom the ceiling of the elevator 3.5 m from the floor.
Calculate the time of flight of the bolt from the ceiling tothe floor. Assume that the elevator continues its upward acceleration. (Use a frame reference fixed with respect to the elevator shaft)
Two 1/2 inch rods are spliced together by glueing a 2 inch section of plastic pipe over the rods ends. If a tensile force P = 350 lb is applied to the spliced nylon rod, what is the average chear stress in the glue joint between pipe and the rods?
Need to prepare the CAD drawings
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 circular tube has an outside diameter of 150mm and an inside diameter of 100mm. If the allowable shearing stress is 55MPa, what is the allowable torque
diameter, are connected by the gears shown. Knowing that G=11.2*10^6 psi, determine (a) the angle through which end A of shaft AB rotates, (b) the angle through which end E of shaft EF rotates.
What are the effects of degree of hydration on capillary pore volume, capillary pore size, porosity, permeability, and compressive strength of hydrated cement (Degree of hydration: hydrated cement/total cement, increases with time and temperature)
Determine the value of Po, as a funciton of H, for these two investment alternatives to be equivalent at an interest rate of i=15% per year.
Determine the energy loss due to the gradual enlargement from a 25 mm pipe to a 75 mm pipe when the velocity of flow is 3 m/s in the smaller pipe and the cone angle of enlargement is 20°C.
Construction Business Enterprise Risk Management is a very large component in the operation of any contracting venture. Discuss how you, as head of operations, would weave risk management into the planning and operations processes
A force P is applied to bent rod ABC, which may be supported in four different ways. In each case, if possible, determine the reactions at the supports.
friction on the concrete surface creates a couple moment of 100 Mm on the blades of the trowel. Determines the magnitude of the resultant couple forces so that the resultant couple on the trowel is zero
At a certain location during the winter, the average air temperature is 10 degrees celcius and the net radiation is 40W/m^2 and during the summer the net radiation is 200W/m^2 and the temperature is 25 degrees celcius.
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