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Posted by Doug Miller on October 8, 2009, 1:04 pm
show/hide quoted text
>Mike Paulsen wrote:
>> SteveB wrote:
>>> How do I figure the area of a pool from the perimeter? It is a kidney
>>> shaped (exaggerated) pool.
>>> Steve
>>
>> 1. Measure the perimeter. Write it down on a scrap of paper. Throw the
>> paper away.
>>
>> 2. Find your pool on google earth or google maps satellite view.
>>
>> 3. Print it, being sure to include something in the print which is easy
>> to measure. (deck, section of fencing, etc.)
>>
>> 4. Weigh the print.
>>
>> 5. Carefully cut out the pool. Weigh the pool
>>
>> 6. Using the actual length of the easy to measure object, determine the
>> area represented by the entire print.
>>
>> 7. Fill in:
>>
>> mass of pool cutout area of pool (unknown)
>> ------------------- = --------------------
>> mass of entire print area of entire print
>>
>>
>> 8. Do the math: (mass of pool) * (area of entire print) / (mass of
>> entire print) = (area of pool)
>It is an exact answer.
>My exact answer is pour 55 gallons of motor oil in the pool (perhaps 0W20).
>The oil, of course, floats. Measure the thickness of the oil layer.
>Since you know the thickness and the volume, determining the area is
>trivial.
Here's another: Measure the pH of the pool water. Add a known amount of acid,
and measure the pH again. Compute the volume of water from the difference in
pH readings.
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Posted by blueman on October 12, 2009, 1:20 am
spambait@milmac.com (Doug Miller) writes:
show/hide quoted text
>>Mike Paulsen wrote:
> Here's another: Measure the pH of the pool water. Add a known amount of acid,
> and measure the pH again. Compute the volume of water from the difference in
> pH readings.
Well the pool presumably have additives which may act as buffers so
not so easy unless you know the exact chemical composition of the pool
"water".
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Posted by harry k on October 8, 2009, 1:16 pm
show/hide quoted text
> Mike Paulsen wrote:
> > SteveB wrote:
> >> How do I figure the area of a pool from the perimeter? =A0It is a kidn=
> >> shaped (exaggerated) pool.
> >> Steve
> > 1. Measure the perimeter. Write it down on a scrap of paper. Throw the
> > paper away.
> > 2. Find your pool on google earth or google maps satellite view.
> > 3. Print it, being sure to include something in the print which is easy
> > to measure. (deck, section of fencing, etc.)
> > 4. Weigh the print.
> > 5. Carefully cut out the pool. Weigh the pool
> > 6. Using the actual length of the easy to measure object, determine the
> > area represented by the entire print.
> > 7. Fill in:
> > mass of pool cutout =A0 =A0 =A0 =A0 area of pool (unknown)
> > ------------------- =A0 =A0=3D =A0 =A0 --------------------
> > mass of entire print =A0 =A0 =A0 =A0area of entire print
> > 8. Do the math: (mass of pool) * (area of entire print) / (mass of
> > entire print) =3D (area of pool)
> It is an exact answer.
Errm...wouldn't you have to allow for the weight of ink in various
areas?
show/hide quoted text
> My exact answer is pour 55 gallons of motor oil in the pool (perhaps 0W20=
> The oil, of course, floats. Measure the thickness of the oil layer.
> Since you know the thickness and the volume, determining the area is
> trivial.
> --
> bud--- Hide quoted text -
Nice. dunno about this: Drop good sized weight in, measure
difference in water level...
Harry K
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Posted by harry k on October 9, 2009, 3:07 pm
show/hide quoted text
> > Mike Paulsen wrote:
> > > SteveB wrote:
> > >> How do I figure the area of a pool from the perimeter? =A0It is a ki=
dney
show/hide quoted text
> > >> shaped (exaggerated) pool.
> > >> Steve
> > > 1. Measure the perimeter. Write it down on a scrap of paper. Throw th=
> > > paper away.
> > > 2. Find your pool on google earth or google maps satellite view.
> > > 3. Print it, being sure to include something in the print which is ea=
> > > to measure. (deck, section of fencing, etc.)
> > > 4. Weigh the print.
> > > 5. Carefully cut out the pool. Weigh the pool
> > > 6. Using the actual length of the easy to measure object, determine t=
> > > area represented by the entire print.
> > > 7. Fill in:
> > > mass of pool cutout =A0 =A0 =A0 =A0 area of pool (unknown)
> > > ------------------- =A0 =A0=3D =A0 =A0 --------------------
> > > mass of entire print =A0 =A0 =A0 =A0area of entire print
> > > 8. Do the math: (mass of pool) * (area of entire print) / (mass of
> > > entire print) =3D (area of pool)
> > It is an exact answer.
> Errm...wouldn't you have to allow for the weight of ink in various
> areas?
> > My exact answer is pour 55 gallons of motor oil in the pool (perhaps 0W=
20).
show/hide quoted text
> > The oil, of course, floats. Measure the thickness of the oil layer.
> > Since you know the thickness and the volume, determining the area is
> > trivial.
> > --
> > bud--- Hide quoted text -
> Nice. =A0dunno about this: =A0Drop good sized weight in, measure
> difference in water level...
> Harry K- Hide quoted text -
Nope, that would calculate volume, not area. Hving been wrong 2 out
of 2 I quit :)
Harry K
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Posted by DerbyDad03 on October 8, 2009, 1:59 pm
show/hide quoted text
> Mike Paulsen wrote:
> > SteveB wrote:
> >> How do I figure the area of a pool from the perimeter? =A0It is a kidn=
> >> shaped (exaggerated) pool.
> >> Steve
> > 1. Measure the perimeter. Write it down on a scrap of paper. Throw the
> > paper away.
> > 2. Find your pool on google earth or google maps satellite view.
> > 3. Print it, being sure to include something in the print which is easy
> > to measure. (deck, section of fencing, etc.)
> > 4. Weigh the print.
> > 5. Carefully cut out the pool. Weigh the pool
> > 6. Using the actual length of the easy to measure object, determine the
> > area represented by the entire print.
> > 7. Fill in:
> > mass of pool cutout =A0 =A0 =A0 =A0 area of pool (unknown)
> > ------------------- =A0 =A0=3D =A0 =A0 --------------------
> > mass of entire print =A0 =A0 =A0 =A0area of entire print
> > 8. Do the math: (mass of pool) * (area of entire print) / (mass of
> > entire print) =3D (area of pool)
> It is an exact answer.
> My exact answer is pour 55 gallons of motor oil in the pool (perhaps 0W20=
> The oil, of course, floats. Measure the thickness of the oil layer.
> Since you know the thickness and the volume, determining the area is
> trivial.
> --
> bud--- Hide quoted text -
> - Show quoted text -
Same idea, but way less messy:
1 - Mark the water level of the pool as it is right now.
2 - Drain the pool 1/2", 3/4", 1", whatever.
3 - Refill the pool to the original line, keeping track of how many
gallons it takes.
"Since you know the thickness and the volume, determining the area is
trivial."
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>> SteveB wrote:
>>> How do I figure the area of a pool from the perimeter? It is a kidney
>>> shaped (exaggerated) pool.
>>> Steve
>>
>> 1. Measure the perimeter. Write it down on a scrap of paper. Throw the
>> paper away.
>>
>> 2. Find your pool on google earth or google maps satellite view.
>>
>> 3. Print it, being sure to include something in the print which is easy
>> to measure. (deck, section of fencing, etc.)
>>
>> 4. Weigh the print.
>>
>> 5. Carefully cut out the pool. Weigh the pool
>>
>> 6. Using the actual length of the easy to measure object, determine the
>> area represented by the entire print.
>>
>> 7. Fill in:
>>
>> mass of pool cutout area of pool (unknown)
>> ------------------- = --------------------
>> mass of entire print area of entire print
>>
>>
>> 8. Do the math: (mass of pool) * (area of entire print) / (mass of
>> entire print) = (area of pool)
>It is an exact answer.
>My exact answer is pour 55 gallons of motor oil in the pool (perhaps 0W20).
>The oil, of course, floats. Measure the thickness of the oil layer.
>Since you know the thickness and the volume, determining the area is
>trivial.