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Unformatted text preview: the water. Determine ∆ U, ∆ KE, ∆ PE, Q, and W for the following changes of state: (a) The stone is about to enter the water. (b) The stone has just come to rest in the bucket. (c) Heat has been transferred to the surroundings in such an amount that the stone and water are at the same temperature they were initially. Department of Agricultural and Biosystems Engineering, The University of Arizona ABE 484/584 CHOI 4. [ Insulator ] Calculate the reduction in heat transfer through a wall made up of jumbo bricks of width = 0.15 m (k=1 W/ m ⋅ o C) created by adding 5 cm of fiber insulating board (k=0.05 W/ m ⋅ o C) to the inside surface of the bricks. The outside wall temperature is – 10 o C, and the inside wall temperature is 20 o C. Calculate R-values and evaluate if we can use these materials in Tucson. Department of Agricultural and Biosystems Engineering, The University of Arizona...
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This note was uploaded on 04/07/2008 for the course ABE 484 taught by Professor Choi during the Spring '07 term at University of Arizona- Tucson.
- Spring '07