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Explain why the speed resolution of a shaft encoder depends on the speed itself. What are some of the other factors that affect speed resolution? The speed of a dc motor was increased from 50 to 500 rpm. How would the speed resolution change if the speed were measured using an incremental encoder by the
(a) Pulse-counting method?
(b) Pulse-timing method?
A maximum flow rate of 6 CFS is available for a river model. This corresponds to 30,000 CFS for the prototype. What is the scale of the model in terms of the prototype size?
Name the two types of devices that constitute the computer aided design hardware
a 180-lb man and a 120-lb woman stand side by side at the same end of a 300-lb boat ready to dive each with a 16-fts
Compute the volume flow rate through the meter that will cause the mercury to flow into the throat. Note that for a given manometer deflection h, the left side will move down h/ 2 and the right side would rise h/2.
the uniform disk of mass pivots freely on the cart of mass. determine the acceleration of the assembly and the angular
Sea water (p=1025 kg/m3) flows through a pump at 0.21 m3/s. The pump inlet is 0.25m in diameter. At the inlet the pressure is -0.15 in of mercury. The pump outlet, 0.152 m in diameter, is 1.8 m above the inlet. The outlet pressure is 175 kPa. If the ..
consider flow of water over a flat plate of length 5 m. on one graph plot the both the drag caused by shear stress and
steam leaves a power plant steam generator at 3.5 mpa 400degc and enters the turbine at 3.4 mpa 375degc. the isentropic
consider an internal combustion engine operating on the ideal dual cycle with thefollowing conditions two cylinder four
pure aluminum is poured into a sand mold. the metal level in the pouring basin is 10 in. above the metal level in the
oxygen tanks are filled by compressing the oxygen gas as shown. an initially evacuated 1 m3 tank is to be filled to
in the mass production of a certain mechanical part the average length of the part is 10.500 inches. the lengths of
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