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Application: Properties of telephone lines. A two-wire, open-air telephone line is made of round wires, 1mm in radius, and are supported 200 mm apart on insulating cups. The line is made of copper, with conductivity of 5.7 x 107 S/m, and the surrounding space is air (with properties of free space). The line is 3 Ian long and is used to transmit data at 10kHz.
(a) What is the load impedance necessary for matched operation?
(b) If the load requires 0.01 W to operate, how much power must be supplied to the line input?
(c) Suppose you are free to adjust the distance between the lines. Can the line be redesigned to be distortionless? If so, how?
an air-standard diesel cycle operates with a compression ratio of 18. at the beginning of the compression process the
Determine the missing property among P,T
A simple graph is triangle-free when it has no simple cycle of length three. Prove for any connected triangle-free planar graph with v>2 vertices and e edges. e
What aspects of the STAMP model do you see represented within the accident causation management system for the chemical manufacturing sector of industry?
1 a closed container contains a third liquid water by volume and the rest of the volume is vapor. select the best
Air in an ideal Diesel cycle is compressed from 4L to .25L, and then it expands during the constant pressure heat addition process to 0.50L. Under cold air conditions, how much is the thermal efficiency of this cycle?
Determine the forces in members DE, DJ, and IJ using the method of sections. I have 5 upper horizontal members; AB, BC, CD, DE, and EF all 3ft apart. A total of 15ft. A pin is at member EF at F. FK is the vertical member connected to a roller at K. M..
The water enters the thin-walled tubes at 17°C and is to leave at 57°C. Assuming an overall heat transfer coefficient of 2000 W/m2 · K, determine the required heat exchanger surface area and the water flow rate.
the following figure shows the schematic diagram of a vapor compression refrigeration system using r-134a as the
a tank containing a fluid is stirred by a paddle wheel. to raise the temperature of the water in the tank from 14 c to
steam enters a well-insulated nozzle at 300lbfin2 600 degrees f with a velocity of 100 fts and exits at 40 lbfin2 with
Determine the force in each member of the loaded truss. The forces are positive if in tension and negative if in compression. Discuss the effects of varying the angle of the 52 degree support surface at C.
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