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Calculating Workby norcal
Tags: work 
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#1
Jun2407, 10:59 PM

P: 19

1. The problem statement, all variables and given/known data
The hemispherical tank shown is full of water. Given that water weighs 62.5 lb/ft3, find the work required to pump the water out of the tank. (the water will be pumped out of a spigot at the top) 2. Relevant equations INTEGRAL from 0 to 5 of: pi*(5h)(25h^2)dh 3. The attempt at a solution INTEGRAL from 0 to 5 of: pi*(h^35h^225h+125)dh pi*((h^4)/4  (5h^3)/3  12.5h^2 + 125h) = (3125/12)*pi ftlb. This answer is incorrect though...anyone know what I am doing wrong? Thanks. 


#2
Jun2507, 07:40 AM

Sci Advisor
HW Helper
Thanks
P: 25,247

You didn't use the density of water data. How would you incorporate this?



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