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A duralumin tie bar of diameter 40 mm and length 600 mm carries a tensile load of 180 kN. If the bar contains a 30 mm diameter hole along 100 mm of its length, determine the stress in the two sections and the overall change in length.
A construction crew lifts approximately 560 lb of material several times during a day from a flatbed truck to a 32 ft rooftop. A block and tackle system with 50 lb of effort force is designed to lift the materials.
An octave is defined as a doubling of the frequency. The claim is made that a low-pass Butterworth filter of order n has a roll-off (attenuation) of 6n dB/octave. Calculate the gain in dB for a second-order filter for the cut-off frequency itself, an..
consider the photovoltaic solar panel of example 3.3. the heat transfer coefficient should no longer be takento be a
Determine the maximum velocity leaving the nozzles and the maximum absolute Mach number in the stage;
water at 4oc is to be delivered to the top of a ski area for snowmaking purposes. the water is to be drawn from a
Determine the mean effective pressure (in psia) of an ideal Otto cycle that uses air as the working fluid; its state at the beginning of the compression is 12.9 psia and 65oF; its temperature at the end of the combustion is 1,545oF; and its compressi..
the populatoin p of a small community on the outskirts of a city grows rapidly over a 20-year periodt 0 5 10 15 20p 100
q1. 1.5 kg of oxygen n2 and 0.15 kg of helium he2 are separated by a partition in a vessel.nbsp the nitrogen is at 5
a long aluminum bar has a diameter of 11 cm and is initially uniform in temperature at 300 c. if it suddenly exposed to
Using the equation developed in Supplementary Problem, determine if a 10-cm-long, 1-mm-diameter steel needle will ?oat in 20-C water. rsteel ¼ 7850 kg=m3.
a novel heat engine is being considered for producing work from the thermal energy contained in the wastewater
air containing 1.6 mol so2 is to be scrubbed with pure water in a packed column with a 1.5 m2 cross-sectional area and
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