Using a sketch, explain why an air barrier is called an air-weather barrier.
What will be an ideal response?
See the Instructor's Manual (IM).
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?In EGW, the molten weld pool is protected from the atmosphere by ____ or by a flux core in the filler electrode.
A. ?oxygen in the atmosphere B. ?a thick blanket of slag C. ?shielding gas D. ?a thick blanket of molten flux
Benjamin used regression analysis to fit quadratic relations to monthly revenue, R, and total cost, TC, data with the following results, where Q is quantity.
R = ?0.008Q2 + 32Q TC = 0.005Q2 + 2.2Q + 10 (a) Using a spreadsheet, plot R and TC. Estimate the quantities QBE and Qp, where the maximum profit should occur. Estimate the amount of profit at this quantity. (b) The profit relation P = R ? TC and calculus can be used to determine the quantity Qp at which the maximum profit will occur and the amount of this profit. The equations are: Profit = aQ2 + bQ + c Qp = ?b/2a Maximum profit = ?b2/4a + c Use these relations to confirm your graphical estimate of QP. (Your instructor may ask you to derive the relations above.)
Explain what scabs are and how they are used on construction projects?
What will be an ideal response?
In a double-subscript notation, what does the first subscript represent?
A. Negative terminal of the voltage B. Positive terminal of the voltage C. Waveform transformed to DC D. Voltage divider rules