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# Assign2-2 - Problem Statement A small electrical motor...

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Problem Statement: 28 A small electrical motor produces 10 W of mechanical power. What is this power in: a) N, m, and s units b) kg, m, and s units Schematic: Assumptions/Approximations: None needed Physical Laws: None needed Properties/Sources: Conversions: None needed 1.00 J/s = 1.00 W 1.00 N*m = 1.00 J 1.00 1.00 N Calculations: (a) 10.00 N*m/s (b) 10.00 Reasoning/Verification/Discussion: None needed kg*m/s 2 = kg*m 2 /s 3 = = N 1 m/s kg 1 J 1 m N 1 W 1 J/s 1 ) W 10 ( 2 W = = J 1 m N 1 W 1 J/s 1 ) W 10 ( W

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Problem Statement: 52 A university campus has 200 classrooms and 400 faculty offices. The classrooms are equipped with 12 fluorescent tubes, each consuming 110 W, including the electricity used by the ballasts. The faculty offices, on average, have 0.5 as many tubes. The campus is open 240 days per year. The classroom and faculty offices are not occupied an average of 4 hr/day, but the lights are kept on. If the unit cost of
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Assign2-2 - Problem Statement A small electrical motor...

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