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The uniform 30-kg bar OB is secured to the accelerating frame in the 30° position from the horizontal by the hinge at O and roller at A. If the horizontal acceleration of the frame is α = 20 m/s2 compute the force FA on the roller and the x- and y-components of the force supported by the pin at O.
You are asked to design a winch system for Santa's sleigh. Assume that Santa weighs 300 lbs, visits 10 houses an hour and requires a 20 foot lift at each house, what is the average power that the system will use if it is perfectly efficient? Express ..
Flange thickness hf= 0.2h and web width bw=0.4. The member will be prestress using graded 270 strand. Time dependant losses are estimate at 20% of Pi. Normal density concrete will be used with f'c = 5000 psi
A large, static, horizontal , isotropic, confined aquifer 100m thick has a uniform hydraulic conductivity field with K=0.1m/d . The piezometric head s in two observation wells are observed to be 103m and 97.3m
Calculate the increased stiffness due to the screen protector. Calculate the required screen protector thickness to increase the stiffness by 40%.
a river diversion canal discharges into a concrete flume of rectangular section running down a steep slope. the walss and the floor of the flume are to be 300 mm thick, and the allowance fro freeboard is to be 300mm.
A rigid rectangular shelf is suspended from a rigid ceiling by mean of four rods of diameter .505 inches. The two rods to the left L1 and L2, are made of steel
Over a long period, total phosphorus (TP) has been discharged to a lake through sewage and surface water runoff at a rate of 10 tons/day. Measures were then taken to reduce the TP load to 1 ton/day.
Determine the centroid for the region bounded by the x-axis, the curve y=x^3, and the line x=3
when their spacing is h, what is the radial component of convective acceleration at the section just inside the edge of the disk (section A) in terms of D, V, and h. assume uniform velocity distribution across the section.
Estimate the chronic daily intake of 1,1,1-trichloro ethane from exposure to a city water supply that contains a 1,1,1-trichloroethane concentration equal to the drinking water standard of 0.2 mg/L.
Assume that a new method allows her to sort 20 rings/min but costs $500 to implement. Is it worth implementing the new method for a batch of 50,000 rings. At what point does the new method pay off.
Assuming approximately 19,296 data points can be held in memory, with a 21X Datalogger (CR23X Micrologger), capturing battery voltage; panel temperature; 2 thermocouples
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