Elementary Principles 246 - CHAPTER SEVEN 0.80 L 35 10 4 kJ...

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7- 1 CHAPTER SEVEN 7.1 080 35 10 030 233 23 4 .. L kJ . kJ work 1 h 1 kW h L 1 kJ heat 3600 s 1 k J s kW kW × =⇒ 2 1 312 3 3 .33 kW 10 W 1.341 10 hp kW 1 W hp .1 hp 3 × . 7.2 All kinetic energy dissipated by friction (a) E mu k = = × ⋅⋅ = 2 2 2 22 4 2 5500 lb 5280 1 9 486 10 715 m 2 2 f 2 2 2 m 2 f 55 miles ft 1 h lb Btu 2 h 1 mile 3600 s 32.174 lb ft / s 0.7376 ft lb Btu . (b) 8 46 3 10 brakings 715 Btu 1 day 1 h 1 W 1 MW 2617 MW day braking 24 h 3600 s 9.486 10 Btu/s 10 W 3000 MW × = × 7.3 (a) Emissions: Paper 1000 sacks oz 1 lb sack 16 oz lb m m + = (. . ) . 00510 00516 641 Plastic
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This note was uploaded on 02/27/2012 for the course CHEMICAL E 312 taught by Professor Cheung during the Fall '11 term at The University of Akron.

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