Measure Volume with Displacement??

[j***@yahoo.com]

I have an irregularly shaped object whose volume is around 30mls. I
need to accurately measure it's volume, (down to say,0.25mls).

I've been submerging it in water in a graduated cylinder, and
measuring the displacement, but the grad cylinders I have are at best
+/- 3 mls.

I REALLY need an accurate way to measure this volume.

I'd sure appreciate any help!

Thanks!

[j***@yahoo.com]

Post by j***@yahoo.com
I have an irregularly shaped object whose volume is around 30mls. I
need to accurately measure it's volume, (down to say,0.25mls).
I've been submerging it in water in a graduated cylinder, and
measuring the displacement, but the grad cylinders I have are at best
+/- 3 mls.
I REALLY need an accurate way to measure this volume.
I'd sure appreciate any help!
Thanks!

Let me add something to this problem:
First: the object is an inflated balloon.

Here's my idea:

Drill a hole in the bottom of a plastic graduated cylinder and attach
a fitting so I can attach a piece of tygon tubing to the bottom of the
cylinder. I now hava a graduated cylinder with a piece of tubing. To
the free end of the tubing, what if I put a 50ml pippette graduated in
0.1mls.

Then, when I filled the cylinder with water some of the water would
flow into the tube and into the pipette. When I submerged the full
balloon, would the the displacement show on the accurate graduations
of the pipette??

[Angelo Campanella]

There is another principal that applies: (Archimedes Buoyancy Law):

Hang the object with a fine thread from a scale that will measure the weight
to your desired accuracy.

You lower that object into the water and read its weight again.

Water has density of 1.000 plus or minus a small temperature effect.

If your object is a balloon, the load a one ounce+ lead sinker onto the
thread first.

Weight it submerged.

Attach the balloon to the lot with a short thread. Weigh again, etc.

If the balloon deforms by touching the suspension thread, form a loop of
fine wire to circumscribe it in suspension while under water.


Angelo Campanella

www.campanellaacoustics.com

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Post by j***@yahoo.com
I have an irregularly shaped object whose volume is around 30mls. I
need to accurately measure it's volume, (down to say,0.25mls).
I've been submerging it in water in a graduated cylinder, and
measuring the displacement, but the grad cylinders I have are at best
+/- 3 mls.
I REALLY need an accurate way to measure this volume.
I'd sure appreciate any help!
Thanks!

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