Given that vC(0) = 2cos(155°) V, what is the instantaneous voltage across a 2-?F capacitor when the current through it is I = 4 sin (10? t + 25°) A?

What will be an ideal response?


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Determine the U-factor of the following roof assembly. The opaque part of the assembly, with an area of 2,500 ft2, has an overall R-value of 35. There is a skylight in the roof, which has an area of 100 ft2, and its overall R-value is 2.0.

What will be an ideal response?

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It is illegal to have pet gerbils in California

Indicate whether the statement is true or false

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Where do commercial refrigeration "rack" systems get their name?

A) They use multiple compressors mounted in a row on a rack. B) They use multiple individual condensing units mounted on a large rack outside. C) RACK stands for Refrigeration Air Conditioning Kontrol. D) They were originally developed by Refrigeration of Ackworth Corporation.

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When preparing weld coupons for V-groove welds with backing, cut the metal backing strips so that they

are at least _____. a. 1" × 3" (25.4 mm × 76.2 mm) b. 1" × 8" (25.4 mm × 203.2 mm) c. 2" × 8" (50.8 mm × 203.2 mm) d. 3" × 8" (76.2 mm × 203.2 mm)

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