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Posted by Jim C Roberts on April 9, 2007, 9:29 pm
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Greetings all,
The following question was raised at work today, thought someone here
might be able to answer it definitively, possibly even with some of that
fancy math I have heard so much about. (G)
On the floor we have a 5 gallon bucket full of water. Suspended 5 ft.
above said bucket we have 1 Quart of water, a tube, with a valve in it, is
attached to the bottom of the quart jar and terminates at the bottom of the
5 gal. bucket. For argument sake the tube is full of water and actually
terminates 1 tube diameter above the very bottom of the bucket, should be no
restriction of flow.
The Question; If the valve is opened, will the water flow from the quart
jar into the bucket?
The general opinion is that the water will not flow due to the fact that
it cannot "push" the ~5 gal. of water up.
Possible Variables;
The tube has no water in it.
The tube size set at 1" ID. (I realize this could be a very big
variable, allowing that if the tube was 6" ID and holding water it could
easily hold more water than the bucket could hold.)
The quart jar and the 1" ID tube are raised to a height so that it
can build sufficient head pressure to flow into the bucket, how high would
that be?
Thanks in advance for any and all help, feel free to point out any other
variables I may have missed.
Regards,
Jim
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Posted by Leo Lichtman on April 9, 2007, 10:16 pm
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"Jim C Roberts" wrote: (clip) If the valve is opened, will the water flow
from the quart jar into the bucket?(clip)
^^^^^^^^^^^^^^^^^^
Water seeks its own level. Water will run out of the one-quart jar into the
5-gal bucket. Since you say the bucket is full of water, one quart of water
will overflow the bucket. The jar and tube will wind up empty. You will
get the same result no matter how far the tube extends into the bucket.
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Posted by Don Young on April 9, 2007, 10:17 pm
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> Greetings all,
>
> The following question was raised at work today, thought someone here
> might be able to answer it definitively, possibly even with some of that
> fancy math I have heard so much about. (G)
>
> On the floor we have a 5 gallon bucket full of water. Suspended 5 ft.
> above said bucket we have 1 Quart of water, a tube, with a valve in it, is
> attached to the bottom of the quart jar and terminates at the bottom of
> the 5 gal. bucket. For argument sake the tube is full of water and
> actually terminates 1 tube diameter above the very bottom of the bucket,
> should be no restriction of flow.
>
> The Question; If the valve is opened, will the water flow from the quart
> jar into the bucket?
>
> The general opinion is that the water will not flow due to the fact that
> it cannot "push" the ~5 gal. of water up.
>
> Possible Variables;
> The tube has no water in it.
> The tube size set at 1" ID. (I realize this could be a very big
> variable, allowing that if the tube was 6" ID and holding water it could
> easily hold more water than the bucket could hold.)
> The quart jar and the 1" ID tube are raised to a height so that
> it can build sufficient head pressure to flow into the bucket, how high
> would that be?
>
> Thanks in advance for any and all help, feel free to point out any other
> variables I may have missed.
>
> Regards,
> Jim
>
In this type of situation, the volumes such as "quart" and "5 gallon" have
nothing whatsoever to do with the problem. Height is the only thing that
matters. The pressure of 5 feet of water above another water surface of will
empty into the lower water if the tube goes to the bottom of the ocean. If
there is an open path and no external pressures, water will always "seek its
own level". In other words, the water that is higher will flow downward.
This would be easy enough to try as an experiment.
Don Young
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Posted by Howard Eisenhauer on April 9, 2007, 10:30 pm
Please log in for more thread options On Mon, 9 Apr 2007 21:29:14 -0400, "Jim C Roberts"
> Greetings all,
>
> The following question was raised at work today, thought someone here
>might be able to answer it definitively, possibly even with some of that
>fancy math I have heard so much about. (G)
>
> On the floor we have a 5 gallon bucket full of water. Suspended 5 ft.
>above said bucket we have 1 Quart of water, a tube, with a valve in it, is
>attached to the bottom of the quart jar and terminates at the bottom of the
>5 gal. bucket. For argument sake the tube is full of water and actually
>terminates 1 tube diameter above the very bottom of the bucket, should be no
>restriction of flow.
>
> The Question; If the valve is opened, will the water flow from the quart
>jar into the bucket?
>
> The general opinion is that the water will not flow due to the fact that
>it cannot "push" the ~5 gal. of water up.
>
> Possible Variables;
> The tube has no water in it.
> The tube size set at 1" ID. (I realize this could be a very big
>variable, allowing that if the tube was 6" ID and holding water it could
>easily hold more water than the bucket could hold.)
> The quart jar and the 1" ID tube are raised to a height so that it
>can build sufficient head pressure to flow into the bucket, how high would
>that be?
>
> Thanks in advance for any and all help, feel free to point out any other
>variables I may have missed.
>
> Regards,
> Jim
>
Jim, I strongly suggest that this hypothetical experiment NOT be
attempted without a hypothetical mop handy otherwise its going to get
hypotheticaly messy. :(
H.
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Posted by Grant Erwin on April 9, 2007, 11:21 pm
Please log in for more thread options Jim C Roberts wrote:
> Greetings all,
>
> The following question was raised at work today, thought someone here
> might be able to answer it definitively, possibly even with some of that
> fancy math I have heard so much about. (G)
>
> On the floor we have a 5 gallon bucket full of water. Suspended 5 ft.
> above said bucket we have 1 Quart of water, a tube, with a valve in it, is
> attached to the bottom of the quart jar and terminates at the bottom of the
> 5 gal. bucket. For argument sake the tube is full of water and actually
> terminates 1 tube diameter above the very bottom of the bucket, should be no
> restriction of flow.
>
> The Question; If the valve is opened, will the water flow from the quart
> jar into the bucket?
>
> The general opinion is that the water will not flow due to the fact that
> it cannot "push" the ~5 gal. of water up.
>
> Possible Variables;
> The tube has no water in it.
> The tube size set at 1" ID. (I realize this could be a very big
> variable, allowing that if the tube was 6" ID and holding water it could
> easily hold more water than the bucket could hold.)
> The quart jar and the 1" ID tube are raised to a height so that it
> can build sufficient head pressure to flow into the bucket, how high would
> that be?
>
> Thanks in advance for any and all help, feel free to point out any other
> variables I may have missed.
The only way some of that water stays up is if there's an airtight lid on
the quart jar, else that quart is all over the floor.
Didn't you ever siphon gas?
GWE
--
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>
> The following question was raised at work today, thought someone here
> might be able to answer it definitively, possibly even with some of that
> fancy math I have heard so much about. (G)
>
> On the floor we have a 5 gallon bucket full of water. Suspended 5 ft.
> above said bucket we have 1 Quart of water, a tube, with a valve in it, is
> attached to the bottom of the quart jar and terminates at the bottom of
> the 5 gal. bucket. For argument sake the tube is full of water and
> actually terminates 1 tube diameter above the very bottom of the bucket,
> should be no restriction of flow.
>
> The Question; If the valve is opened, will the water flow from the quart
> jar into the bucket?
>
> The general opinion is that the water will not flow due to the fact that
> it cannot "push" the ~5 gal. of water up.
>
> Possible Variables;
> The tube has no water in it.
> The tube size set at 1" ID. (I realize this could be a very big
> variable, allowing that if the tube was 6" ID and holding water it could
> easily hold more water than the bucket could hold.)
> The quart jar and the 1" ID tube are raised to a height so that
> it can build sufficient head pressure to flow into the bucket, how high
> would that be?
>
> Thanks in advance for any and all help, feel free to point out any other
> variables I may have missed.
>
> Regards,
> Jim
>