Currently, the ____ project, a joint effort of experts from industry, academia, and government, is working to standardize UNIX.

A. POSIX
B. BSD
C. ANSI
D. Ubuntu


Answer: A

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A conductive heat transfer of 15 W is applied to a metal bar whose length is 0.50- m. The hot end of the bar is at 80oC. Determine the temperature at the other end of the bar for (a) a copper bar (? = 401 W/m-K) with a cross-sectional area of 0.0005 m2, (b) a copper bar (? = 401 W/m-K) with a cross-sectional area of 0.005 m2, and (c) a zinc bar (? = 116 W/m-K) with a cross-sectional area of 0.005 m2.

Given: Q?cond=150 W; ?x = 0.50 m; T1 = 80°C What will be an ideal response?

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?Which plastics has no known brittle point?   

A. ?acrylic B. ?epoxy C. ?PVC D. ?ABS

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What is the difference between voltage and current?

What will be an ideal response?

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While very effective at removing small contaminants, HEPA filters are not used in residential applications because of what reason?

A) They cause a high pressure drop in the duct. B) Extremely high cost C) Low efficiency D) Not available in home centers

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