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# hw26b - aljabr(faa335 Hw26 Ross(89251 This print-out should...

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aljabr (faa335) – Hw26 – Ross – (89251) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Given: The specific heat of air is approxi- mately 1 kJ / kg · C. Take the density of air to 1 . 25 kg / m 3 . The specific heat of water is 4 . 19 kJ / kg · C and the density of water is 1000 kg / m 3 . The air temperature above the coastal areas is profoundly influenced by the large specific heat of water. One reason is that the heat released when 2 m 3 of water cools by 2 C will raise the temperature of an enormously larger volume of air by 3 C. Calculate this volume of air. Correct answer: 4469 . 33 m 3 . Explanation: Given : V w = 2 m 3 , c w = 4 . 19 kJ / kg · C , ρ w = 1000 kg / m 3 , c air = 1 kJ / kg · C , ρ air = 1 . 25 kg / m 3 , Δ T w = 2 C , and Δ T air = 3 C . ρ w V w c w Δ T w = ρ air V air c air Δ T air V air = ρ w V w c w Δ T w ρ air c air Δ T air = (1000 kg / m 3 )(2 m 3 ) 1 . 25 kg / m 3 × (4 . 19 kJ / kg · C) (2 C) (1 kJ / kg · C) (3 C) = 4469 . 33 m 3 .

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hw26b - aljabr(faa335 Hw26 Ross(89251 This print-out should...

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