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o/t science question about land leveling

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workhorse

03-24-2007 07:29:33




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If a section (1 mile square) of land were leveled out perfectly flat and filled with exactly 640 acre ft of water, would the water depth in the center be deeper, shallower, or the same, as the depth along the edges?




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Kent in KC

03-26-2007 05:42:16




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
I understand there is a place in the Mediterrenean (sp?) where the sea level is several feet lower than the surrounding water. Reason: an underwater mountain, with its associated gravitational (mass) attraction.



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gold-leaf-deere

03-24-2007 19:30:11




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
If the one mile square water, one foot deep does not have a levee,dike or dam around the perimeter at least one foot high the water would all run off.



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1936

03-24-2007 17:35:50




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
I depends on the locations of the push clay and the sandy areas? If a stump had been left near the center and I was standing on it with a 12 pack I would believe the center would become some what deeper in a short time.
Windy direction, speed, and if it was near high or low tide can come into play. Now if a 1000 geese would land on one side and a musk rat was swiming on the other side that could throw off all possibilities about two 12 packs near the stump.

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Gerald J.

03-24-2007 16:53:05




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
Depends on how you reckon the land is flat. If you do it with a gravity operated level, the land will have the same hump in the middle as the water above it. If you level the land with a laser resting at one spot, like a corner, the land won't have that hump in the middle and the water will be deeper there.

How much deeper? Mathmatically, 0.7 * 5280 * 12 * (1.0 - cos (0.7 / 69 degrees)) inches which my calculator says is 0.000696 inches. That's a bit smaller than the laser beam used to flatten the patch.

Gerald J.

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Sam#3

03-24-2007 14:47:10




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  

From Merriam-Webster online
lev·el
2 : a measurement of the difference of altitude of two points by means of a level
3 : horizontal condition; especially : equilibrium of a fluid marked by a horizontal surface of even altitude
flat
4 : arranged or laid out so as to be level or even
surfaces
Without making any qualifications such a "is the wind blowing?" or "The moon is in the third quarter." and just defining the problem parameters as level and flat the water would have the same depth throughout.
Being 'level' implies the land was laid out using by utilizing the use of gravity and the water will seek it's own level.

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Larry NE IL

03-24-2007 12:02:32




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
This sounds like the: If you weigh a five gallon bucket of water, then put in a live swimming 5 lb fish and weigh again, would the bucket of water weigh 5 lbs more with the fish swimming in it?



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circus

03-24-2007 11:16:51




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
with the land flat and the water level, the water would be deeper(higher) in the center.



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Sid

03-24-2007 09:51:56




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
If you plumb two lines and run them forever, the taller they get the farther apart they become. As they go downward they will meet when they get to the center of the earth. Plumb is determined by the pull of gravity. If you run two lines perfectly level forever they will remain the same distance apart forever and will eventually go off into outer space. So perfectly flat would be perfectly level. So the water depth would be the same.

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Vern-MI

03-24-2007 14:48:40




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 Re: o/t science question about land leveling in reply to Sid, 03-24-2007 09:51:56  
Perfectly level would follow the Earths curvature while perfectly flat would be a straight line in all directions and would not follow the earths curvature. Well I suppose that's the case since I haven't tried it. They did think the Earth was flat back in Columbuses time and that he would fall/sail right off the edge. I wish he would have stayed at home and worked on his John Deere tractor. Now it's a tractor topic.

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dad's88

03-24-2007 10:57:01




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 Re: o/t science question about land leveling in reply to Sid, 03-24-2007 09:51:56  
AH! THAT explains why my neighbors silos are leaning apart from each other. And here we always blamed it on the builder!



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RAB

03-24-2007 08:57:56




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
OK, just imagine if the Earth were 50 miles out of round and the radius at the north and south poles was less than at the equator. Would the sea be deeper at the poles? No, it would not, and it is not!



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Nebraska Cowman

03-24-2007 08:44:24




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
If you level it perfectly it will folow the earths curve. But my question is will there be a tide?



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Nebraska Cowman

03-24-2007 08:49:43




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 Re: o/t science question about land leveling in reply to Nebraska Cowman, 03-24-2007 08:44:24  
So yeah, to answer you question If you level it "flat" then the edges are going to be way up in the air. Then I am not sure what the water will do but I'd guess it would be pretty unsatble. You gonna try it?



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135 Fan

03-24-2007 08:20:20




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
Water isn't measured in square feet. Dave



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Allan In NE

03-24-2007 08:24:53




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 Re: o/t science question about land leveling in reply to 135 Fan, 03-24-2007 08:20:20  
He didn't say "square feet", he said acre-feet, which is the amount of water to cover one acre of land one foot deep.

It's an irrigation thing.

Allan



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dad's88

03-24-2007 11:04:58




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 Re: o/t science question about land leveling in reply to Allan In NE, 03-24-2007 08:24:53  
OR, maybe it's an "irritation" thing!



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135 Fan

03-24-2007 08:50:54




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 Re: o/t science question about land leveling in reply to Allan In NE, 03-24-2007 08:24:53  
Now I know. Dave



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Vern-MI

03-24-2007 07:43:46




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
If you were to fly an airplane from New York to Beijing what starting and ending altitude would the plane have to be at in order to fly it the whole distance in a straight line? Assume that the altitude would be measured through a perpindicular line at both the start and end points and that the start and end point altitudes were equal.



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Nebraska Cowman

03-24-2007 08:42:25




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 Re: o/t science question about land leveling in reply to Vern-MI, 03-24-2007 07:43:46  
Yeah, I just read Charles Lindborg's story and he flew a circular route to Paris. I do not understand it but he didn't miss Paris airport by more than a quarter mile.



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Bill(Wis)

03-24-2007 09:07:49




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 Re: o/t science question about land leveling in reply to Nebraska Cowman, 03-24-2007 08:42:25  
He flew the "arc of a great circle". A "great circle" cuts the earth directly in half. The equator is a great circle. Any line of longitude is a part of a great circle. If you want the shortest distance between New York and Tokyo you cut the earth exactly in half on a line between NY and Tokyo and fly that line.



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Jim in N M

03-24-2007 07:38:06




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
If it's dead flat, the water should be the same all over ,IF you could retain the water,but it would have to be damned up on all sides. J.L.



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Vern-MI

03-24-2007 07:34:08




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 Re: o/t science question about land leveling in reply to workhorse, 03-24-2007 07:29:33  
Take an even larger area or body of water like the ocean and you will notice that it follows the same curvataure as the earth. So My guess is that it would be deeper in the middle due to this curvature.



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old art

03-24-2007 15:15:34




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 Re: o/t science question about land leveling in reply to Vern-MI, 03-24-2007 07:34:08  
if you have a lever head is it ffat on top??



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