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May 4th, 2013, 09:13 AM  #1 
Newbie Joined: May 2013 Posts: 1 Thanks: 0  Work done pumping water out of a spherical tank
Hi everyone, if someone could explain how to do this problem I would be so grateful! Find the work done in pumping all the water out of a container which is a round sphere of radius 5 m and which is half full (i.e. the water has to be lifted to the top of the sphere before it can be removed). Assume: g ? 10m/sec^2 and ? = 1000 kg/m3 
May 4th, 2013, 11:22 AM  #2 
Senior Member Joined: May 2011 Posts: 501 Thanks: 6  Re: Work done pumping water out of a spherical tank
Here's a start: For a circle of radius 5 and center (0,5) we have . a disk y feet from the bottom of the tank has to be moved a distance feet. integrate from 0 to 5 

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