A circular orifice 15-mm-diameter is located at the bottom of a tank 0.5 m2 in plan area.  At a given instant the head above the orifice is 1.1 m.  300 seconds later the head is reduced to 0.8 m. Determine the head above the orifice from 1.1 m. after 240 seconds.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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A circular orifice 15-mm-diameter is located at the bottom of a tank 0.5 m2 in plan area.  At a given instant the head above the orifice is 1.1 m.  300 seconds later the head is reduced to 0.8 m. Determine the head above the orifice from 1.1 m. after 240 seconds. 

*The only accepted answer is 0.8563. Show solution.

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