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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, and for three octaves above the cut-off frequency, i.e., for f/f cut off = 1, 2, 4, and 8. Then determine the roll-off in dB per octave. Does the calculated roll-off agree with the stated value of 6n dB/octave? Is the agreement better for low frequencies or high frequencies? Repeat for filters of order 4 and 6.
the drive roller for a conveyor belt. a link a-b is rotating at 80 rpm counterclockwise .blink a-b is 60mm longlink b-c
Ten grams of computer chips with a specific heat of 0.3 kJ/kg dot K are initially at 15 degrees C. These chips are cooled by placement in 5 grams of saturated liquid R134a at -38 degrees C.
air at 110 kpa and 50 c flows upward through a 6-cm-diamter inclined duct at a rate of 45 ls. the duct diameter is then
a calculate the number of electrons in a small electrically neutral silver pin that has a mass of 8.0 g. silver has 47
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The compression strength of Kevlar 49 fiber is about one-eight of its tensile stress. Estimate the smallest diameter of a rod on which 12 um diameter Kevlar fiber can be wound without causing kinks on its compression side.
two flash distillation chambers are hooked together. both are at 1 atm pressure. the feed to the first drum is a binary
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