The long run average cost curve
A) Reflects increasing, constant and decreasing returns to labor.
B) Is an envelope of a series of short run average cost curves.
C) Is an envelope of a series of marginal cost curves.
D) None of the above
B) Is an envelope of a series of short run average cost curves.
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The major difference between a standard relay and a contactor is the ____ of the contacts.
a. operation b. number and size c. metallic content d. current carrying capability
Lines representing walls are drawn with ____ lines on A ROOF WALL layer.
A. bold B. dashed C. thick D. construction
A four-bit R-2R ladder DAC is presented in Fig. 5.103.
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What is the purpose of flux?
A) To prevent the solder from alloying with the pipe B) To promote surface tension in the solder C) The flux makes it easier to assemble the fitting. D) To remove light surface oxidation and prevent new oxidation