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Ocean water contains 0.9 ounces of gold per ton. Method A costs $550 per ton of water processed and will recover 90% of the metal. Method B costs $400 per ton of water processed and will recover 60% of the metal. The two methods require the same capital investment and are capable of producing the same amount of gold each day. If the extracted gold can be sold for $1,750 per ounce, which method should be recommended? The supply of ocean water is essentially unlimited. Hint: Work this problem on the basis of profit per ounce of gold extracted
Design a full wave unregulated dc power supply having an input of 220 V rms 60 Hz and an output voltage maximum of 19.5 V and a minimum of 15 V. This power supply will be needed to provide power to a load which requires a maximum current
design a new p-type semiconductor material. Acceptor density is Na=5x1015 cm^-3 and there are no donors are present in the material. The effective densities of states for this material is given as Nv=1.8x10^19cm^-3
What does the following code do. class MyListener implements ActionListener public void actionPerformed (ActionEvent e) MyListener listener = new MyListener Timer t = new Timer(interval, listener)
rc ciruit current course 3u-t a in parrallel to 6k ohm resistor and 5uf cap. determine the instantaneous power
An eight-point real-valued signal s has DFT given by S = [ 3 x1 4 -4+3j -2 x2 x3 1-2j ] A. Compute s[0] - s[1] + s[2] - s[3] + s[4] - s[5] + s[6] - s[7] using one entry of X only. B. Determine the values of x1, x2, x3.
A) each charge is qual to q. Find the points in space at which the field intensity is zero. B) two charges are qual to q the third to 2q. show that the electric field intensity is zero only at infinity.
the discrete-time systems, where y[n] and x[n] are, respectively the output and the imput sequences, determine whether or not the system is (1) linear, (2) causal, (3) stable, and (4) shift-invariant: y[n] = x[n+3];
Design a combination circuit that accepts a 4bit number and generates a 3 bit binary output that approximatesthe square root of the number. For example, if the square is 3.5 orlarger, give the result of 4. if the square root is
A new type of Schottky diode is optimized for low-voltage applications. It has typical forward voltage drop of 0.2 V, but its leakage current can be as high as 80 mA. It is being considered for a 12 V to 2.5 V converter with 50 W load.
The total bandwidth allocated is 200MHz . The signal-to-interference-ration required is 18 dB. Propagation path loss exponent n = 3 and omnidirectional antennas for the base stations are used. ?1) Find the appropriate cluster size.
An op-amp has an open-loop gain of 200 V/V. If this op-amp is used to build an inverting amplifier with an absolute gain of 50V/V: (a) What must the smaller resistor be adjusted to, if the larger resistor is 100 k
a certain 11 v dry-cell battery completely discharged requires a current of 100 ma for 1.2 hr to completely recharge.
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