[meteorite-list] Specific Gravity method /calculation error

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From: Howard Wu <freewu2000_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:20 2004
Message-ID: <20040203192351.86575.qmail_at_web60004.mail.yahoo.com>

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Why not just use a graduated measuring cup. You can even stick it in a condom or plastic bag and suck the air out for an estimated dry measurement.

Howard Wu

Roman Nakonechny <uraninut239__at_hotmail.com> wrote:
Thanks John. A visit to our great ally France oughtta git yew metricized
mighty quick-like . The delta component of your calculation cause a Cold
Fusion Reaction inthe coffee can and now there's a great depression in the
earth where my suburb used to be.We need to get our stories straight, John.
={:-)> L A T E R ~~~~~~~~~~~*Roman

>From: j.divelbiss_at_att.net
>To: uraninut239__at_hotmail.com
>CC: meteorite-list_at_meteoritecentral.com, Subject: [meteorite-list] Specific
>Gravity method /calculation error
>Date: Tue, 03 Feb 2004 12:39:52 +0000
>
>Roman and others,
>
>I guess I really am slow/dumb. your SG answers maybe too small right now...
>
>Well if you haven't blown anything up...I'm lucky. My calculation has an
>error in it from the other day. In the volume part of the equation I left
>out
>the division by 4 when using the diameter for area. If you use the
>radius(1/2
>diameter)...then you don't need the 4. The corrected method is below:
>*******************************************************************
>
>Then I use a cylinder(round) shaped coffee can for small items, or a
>straight
>sided bucket for larger items to determine the volume of the object by the
>change in height of the water: first without the object and then with the
>object. As a slow American I use a stick rule in inches to figure this out.
>
>so it goes like this:
>
>determine weight in OUNCES
>
>Determine the change in volume in the water level by measuring the:
>HEIGHT without object first
>HEIGHT with the object second
>
>The difference in height in inches is then used to calculate the SG along
>with some conversions factors to get it into grams/centimeter cubed.
>
>change or delta Volume = Area of container circle x inches in
>height(change)
>delta V =(pie or 3.14...)x diameter(inches) squared)x(height change in
>inches)/4 (Note: this is where I has left out the 4)
>
>delta V is a number in inches cubed
>
>the conversion formula without all the details is as follows:
>
>SG = (object in OUNCES/delta V in inches cubed)x(0.06102/0.03527) = SG in
>grams/cm cubed (Note: without the 4 your SG answer would have been 4
>times smaller)
>
>0.06102 is the conversion of cubic inches to cubic centimeters
>0.03527 is the conversion of ounces to grams.
>
>For the smart users of metric the metric system....the answer is determined
>by the change in volume in cubic centimeters cubed and the weight in grams
>or:
>
>Weight in grams/change in Volume in centimetes cubed (now that seems easier
>doesn't it) = grams/cm cubed
>
>Bottom line is most rocks have SG of 1.5 to 3, heavier rocks full of iron
>
>like stony meteorites are in the 3 to 5 range, and steel and it's metal
>friends like iron meteorites are in the neighborhood of 7 to 8. Silver and
>Lead in the 10 to 11 range and gold all the way up near 18 to 19.
>
>Sheesh,
>
>John
>
>
>______________________________________________
>Meteorite-list mailing list
>Meteorite-list_at_meteoritecentral.com
>http://www.pairlist.net/mailman/listinfo/meteorite-list

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<DIV>Why not just use a graduated measuring cup. You can even stick it in a condom or plastic bag and suck the air out for an estimated dry measurement.</DIV>
<DIV> </DIV>
<DIV>Howard Wu Roman Nakonechny <uraninut239__at_hotmail.com> wrote:</DIV>
<BLOCKQUOTE class=replbq style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Thanks John. A visit to our great ally France oughtta git yew metricized mighty quick-like . The delta component of your calculation cause a Cold Fusion Reaction inthe coffee can and now there's a great depression in the earth where my suburb used to be.We need to get our stories straight, John. ={:-)> L A T E R ~~~~~~~~~~~*Roman >From: j.divelbiss_at_att.net >To: uraninut239_@hotmail.com >CC: meteorite-list@meteoritecentral.com, Subject: [meteorite-list] Specific >Gravity method /calculation error >Date: Tue, 03 Feb 2004 12:39:52 +0000 > >Roman and others, > >I guess I really am slow/dumb. your SG answers maybe too small right now... > >Well if you haven't blown anything up...I'm lucky. My calculation has an >error in it from the other day. In the volume part of the equation I left
 >out >the division by 4 when using the diameter for area. If you use the >radius(1/2 >diameter)...then you don't need the 4. The corrected method is below: >******************************************************************* > >Then I use a cylinder(round) shaped coffee can for small items, or a >straight >sided bucket for larger items to determine the volume of the object by the >change in height of the water: first without the object and then with the >object. As a slow American I use a stick rule in inches to figure this out. > >so it goes like this: > >determine weight in OUNCES > >Determine the change in volume in the water level by measuring the: >HEIGHT without object first >HEIGHT with the object second > >The difference in height in inches is then used to calculate the SG along >with some conversions factors to get it into grams/centimeter
cubed. > >change or delta Volume = Area of container circle x inches in >height(change) >delta V =(pie or 3.14...)x diameter(inches) squared)x(height change in >inches)/4 (Note: this is where I has left out the 4) > >delta V is a number in inches cubed > >the conversion formula without all the details is as follows: > >SG = (object in OUNCES/delta V in inches cubed)x(0.06102/0.03527) = SG in >grams/cm cubed (Note: without the 4 your SG answer would have been 4 >times smaller) > >0.06102 is the conversion of cubic inches to cubic centimeters >0.03527 is the conversion of ounces to grams. > >For the smart users of metric the metric system....the answer is determined >by the change in volume in cubic centimeters cubed and the weight in grams >or: > >Weight in grams/change in Volume in centimetes cubed (now that seems easier >doesn't it) = grams/cm
cubed > >Bottom line is most rocks have SG of 1.5 to 3, heavier rocks full of iron > >like stony meteorites are in the 3 to 5 range, and steel and it's metal >friends like iron meteorites are in the neighborhood of 7 to 8. Silver and >Lead in the 10 to 11 range and gold all the way up near 18 to 19. > >Sheesh, > >John > > >______________________________________________ >Meteorite-list mailing list >Meteorite-list_at_meteoritecentral.com >http://www.pairlist.net/mailman/listinfo/meteorite-list _________________________________________________________________ Check out the new MSN 9 Dial-up � fast & reliable Internet access with prime features! http://join.msn.com/?pgmarket=en-us&page=dialup/home&ST=1 ______________________________________________ Meteorite-list mailing
list Meteorite-list_at_meteoritecentral.com http://www.pairlist.net/mailman/listinfo/meteorite-list</BLOCKQUOTE><hr size=1> <a href="http://uk.rd.yahoo.com/mail/tagline_messenger/*http://uk.messenger.yahoo.com">
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Received on Tue 03 Feb 2004 02:23:51 PM PST

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