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A 425-m3(15,000 ft3) basin filled with wastewater is to be aerated with 10 spargers, each sparger using air at the rate of 7:08 × 10-3 m2/s.
Find the time that is necessary to raise the dissolved oxygen level in the wastewater from 8 × 10-2to 2 × 10-1 mmol/L if the temperature of the water is 283 K and the depth of the water above the spargers is 3.2 m.
The dissolved solids content will be low enough so that Henry's law will be obeyed, with a Henry's law constantof3.27×104 atm/mole fraction.
In multiplicative decrease, the congestion window size decreases by half(if the result is not an integer round down to the nearest integer).Suppose that the two TCP connections C1 and C2, share a single congested link of speed 30 segments per seco..
The heating element in a soldering iron has a resistance of 30-ohm. Find the average power dissipated in the soldering iron if it is connected to a voltage source of 117 V rms.
A series circuit consisting of a 0.398-henry inductor and a 212-µF capacitor is connected to a 125-volt variable frequency source. At what frequency will the circuit take a lagging current of 2.5 A a leading current of 2.5 A
How can the real power flow through an ac-dc motor-generator set be controlled?
A team of scientists is designing a radar as a probe for measuring the depth of the ice layer over the Antarctic land mass.To measure a detectable echo due to the reflection by the ice-rock boundary, the thickness of the ice sheet should not excee..
Design a suitable amplifier using a combination of these stages. Your design should utilize the minimum number of stages and should ensure that the signal level is not reduced below 10 mV at any point in the amplifier chain.
Knowing that the maximum stress after the offset is introduced must not exceed 4 times the stress in the tube when it is straight, determine the largest offset that can be used.
A DC electric motor draws a current of 8 amps, at a voltage of 50V. The efficiency of the motor is given as 60% at a a spindle speed of 400 rpm. Calculate the torque produced by the motor.
The effective ac resistance between the stator terminals is 2.2 W and the full-load slip is 4%
The major principle stress at failure for a triaxial compression test on dense sand was 5.15 tsf.the minor principal stress ,or lateral pressure, was 1.45 tsf. plotthe mohr circle at failure and, assuming the sand to be cohesionless, determine the..
How many pins are required to design 8-KB bit organized memory? How many pins are required to design 8-KB byte organized memory? What are the advantages of CDROM?
A discrete-time zero-mean random process whose autocorrelation function is given - Find the autocorrelation function of the output. - Find the PSD of the output.
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