Engine_2014 : Steam Plants - 501/1951
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| In a boiler, water flows downward in tubes furthest from the fires and flows upward in tubes nearest the fires because __________. |
| A) water is denser in the tubes farthest from the fires |
| B) water is less dense in the tubes farthest from the fires |
| C) tubes farthest from the fires have a greater diameter |
| D) tubes farthest from the fires have a smaller diameter |
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