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1 what is a frequency distribution what benefits does it offer in the summarization and reporting of data values2
an organizations landscape can be expansive and complex most organizations rely heavily upon information technology as
1 a hydraulic system uses pistons of diameter 2 cm and 40 cm what force on the small piston will raise a 500-kg mass2 a
1 a stepping motor has 130 steps per revolution find the digital input rate that produces 105 revs2 a stepping motor
a solenoid plunger has a 5-cm stroke and a 6-n pull-in force devise a system using a pivotlever to provide a stroke of
determine and plot the average power delivered to a 100-omega load in place of the light bulb in example as a function
suppose there is another 20-ms light pulse that may strike the cell in given problem but it is of lower intensity so
modify given problem by using a diac with a plusmn 2-v breakover voltage in place of the 100-omega resistor to trigger
figure shows an scr used in a circuit to provide variable electrical power to a resistive load from a high-power
a motor to be driven by a digital signal has a speed variation of 200 revmin per volt with a minimum rpm at 5 v and a
implement the equation of given problem if a power amplifier is available that can output 0 to 100 v and has a gain of
a 4- to 20-ma control signal is loaded by a 100 omega resistor and must produce a 20- to 40-v motor drive signal find
an automatic security camera must operate as follows when an intrusion occurs1 if the ambient light level is greater
figure shows a laser with a 60-mw output power 10-cm output beam diameter and fixed divergence of 02deg a photodiode
for the turbidity system in figure 1 two matched photoconductive cells are used with r vs as given in figure 2design a
a special timing circuit can resolve 24-ns time difference find the closest distance that could be measured using laser
in a turbidity system such as that of figure the tanks are 2 m in length a laser with a 22-mrad divergence 21-mw power
a 10-w argon laser has a beam diameter of 15 cm if focused to a 1-mm diameter find the intensity of the radiation beam
the photoconductive cell in figure is used to measure distance from a stable source of 05- wavelength radiation the
design a system using the photoconductive cell in figure to measure and display light intensity make the design such
a silicon photovoltaic cell is employed in the circuit shown in figure the cell has an internal resistance of 65omega a
a single silicon photovoltaic cell is found to have an open-circuit voltage of 06 v and a short-circuit current of 15
what pneumatic pressure is required on the small piston of given problem to produce the necessary forceproblem a
the scr in figure requires a 4-v trigger design a system by which the gears are shifted when a cds photocell resistance
design a system by which a control signal of 4 to 20 ma is converted into a force of 200 to 1000 nuse a pneumatic