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A tank containing 6000L of water drains out in 30 min. The volume V of water in the tank after t min of draining isV=6000(1-t/30)2. Find the instantaneous time rate of change of V after 15 min draining.
A DTMF signal with duration T seconds can be modeled as a sum of two cosine signals with frequencies frand fc, multiplied by a rectangle function. For example, the DTMF signal for "1" is g1(t) = rect (t/T) * [cos(2pi*687t)+cos(2pi*1209t)]
The light from a cameras electronic flash is produced when a high voltage obtained by charging a capacitor is applied to electrodesin a xenon-filled flash bulb. (a) to what voltage would a 60-microfarad capacitor be charged by a6mA current lasting ..
in the bottom of the 9th inning, the bases are loaded and the braves are down by three runs. chipper johns steps to the plate. twice he swings and misses. The crowd heads for the exits. the next pitch is a fast ball down the middle.
A 440-V three-hase Y-connected synchronous motor has a synchronous reactance of 1.5 ohms per phase. The field current has been adjusted so that the torque angle is 28 degrees when the supplied power to the motor is 90kW.
phosgene ccl2o is a colorless insidious, highly toxic gas which has been used as a war gas and is sometimes used in the preparation of organic chemicals. draw the lewis structure for phosgene ( Cis the central atom)
A 1-uF capacitance is in parallel with the series combination of a 6-uF capacitance and a 3-uF capacitance. Sketch the circuit diagram and determine the equivalent capacitance of the combination.
a. Sketch the spectrum of the original signal and the sampled signal from 0 kHz and 25 kHz. b. Sketch the recovered analog signal spectrum if an ideal lowpass filter with a cutoff frequency of 4 kHz is used to filter the sampled signal. X(f) 10k 2..
Let x1[n] = {-2,1,-3,-5,6,8} with arrow under -2 and x2[n]={1,2,3,4} with arrow under 1. a) determine circular convolution of 7 between x1[n] and x2[n] b) verify (a) calculations by computing the DFTs and IDFT.
Draw a state transition diagram for a state machine that reads in a sequence of binary digits, one at a time, and stops when it has read in five 1s (need not be consecutive). To "stop" the machine, merely have it orbit in the state
A constant(dc) current i(t)=3mA flows into a 50x10^(-6) capacitor. The voltage at t=0 is v(0)= -20V. The references for v(t) and i(t) have the passive configuration. 1. find the power at t=0 2. state whether the power flow into or out of the capaci..
a) If the parallel inductor is replaced with a single inductor, what would be the value of the inductor b) What would be the initial current through the equivalent inductor c) Find i_1(t) and i_2(t) and verify that they satisfy using the Kirchoff's C..
A certain cache has an access time of 2 nanoseconds and a hit percentage of 95%. If the main memory access time is 8 nanoseconds, what is the average access time for a read operation?
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