___________ transfers energy from a primary to an adjacent secondary waveguide for energy traveling in the main guide in one direction only
A. Microstrip
B. Pulse repetition frequency
C. Directional coupler
D. Stripline
C
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All of the following statements are true EXCEPT:
A. tapered roller bearings are self-aligning. B. tapered roller bearings are assembled with the inner race, bearings, and cage as a single unit. C. needle bearings can tolerate misalignment. D. a very small roller bearing is called a needle bearing.
Briefly describe the following arrangements styles:
What will be an ideal response?
A closed-loop system ___________
a. Has a feedback sensor that tells the control system how close it is getting to the setpoint. b. Does not have a feedback sensor that tells the control system how close it is getting to the setpoint. c. Changes its output based on a table rather than on a feedback sensor.
Consider a steel pan used to boil water on top of an electric range. The bottom section of the pan is L = 0.5 cm thick and has a diameter of D = 20 cm. The electric heating unit on the range top consumes 1250 W of power during cooking, and 85 percent of the heat generated in the heating element is transferred uniformly to the pan. Heat transfer from the top surface of the bottom section to the water is by convection with a heat transfer coefficient of h. Assuming constant thermal conductivity and one-dimensional heat transfer, express the mathematical formulation (the differential equation and the boundary conditions) of this heat conduction problem during steady operation. Do not solve.
