Solving a problem in physics section 18 paragraph 71 qu
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71. Black walled metallic cube with a side of a = 10 cm filled with water at a temperature of T1 = 80 ° C. Determine the time ? cooling cube to a temperature T2 = 30 ° C, if it is placed inside the vacuum chamber zachernёnnoy. The temperature of the chamber walls is maintained close to absolute zero.
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- Updated on the site 30.03.2014
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Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)
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Cumulative discount
| 30 $ | the discount is 10% |
| 20 $ | the discount is 7% |
| 18 $ | the discount is 6% |
| 15 $ | the discount is 5% |
| 12 $ | the discount is 4% |
| 9 $ | the discount is 3% |
| 6 $ | the discount is 2% |
| 3 $ | the discount is 1% |
Check your discount
Amount of purchases from the seller: $
Your discount: %