File:Prototype mass drifts.jpg
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Prototype_mass_drifts.jpg (790 × 500 pixels, file size: 202 KB, MIME type: image/jpeg)
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DescriptionPrototype mass drifts.jpg |
English: A graph of the relative change in mass of selected kilogram prototypes. From The Third Periodic Verification of National Prototypes of the Kilogram (1988—1992), G. Girard, Metrologia 31 (1994) 317—336. The International Prototype Kilogram (IPK) kept in Sevres, France, and the other national prototype kilogram standards have been found to vary in mass over the years. Since the IPK defines the kilogram, the only way to detect changes in mass is to compare the mass of the prototypes, which is done every 40 years. This graph shows the "mass drift" of the numbered prototypes compared to the IPK.
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Date | 11 December 2007 (original upload date) |
Source | Transferred from en.wikipedia to Commons by Choihei using CommonsHelper. |
Author | Greg L at English Wikipedia |
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[edit]Greg L at the English Wikipedia, the copyright holder of this work, hereby publishes it under the following license:
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
Attribution: Greg L at the English Wikipedia | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
Original upload log
[edit]The original description page was here. All following user names refer to en.wikipedia.
- 2007-12-11 17:12 Greg L 790×500× (206527 bytes)
- 2007-12-11 17:03 Greg L 790×500× (206652 bytes)
- 2007-12-11 04:41 Greg L 790×500× (206652 bytes)
- 2007-12-10 07:27 Greg L 790×500× (193555 bytes)
- 2007-12-10 07:16 Greg L 790×500× (183198 bytes)
- 2007-12-10 04:22 Greg L 790×500× (194748 bytes) A graph of the relative change in mass of selected kilogram prototypes. From ''The Third Periodic Verification of National Prototypes of the Kilogram (1988â1992)'', G. Girard, Metrologia '''31''' (1994) 317â336
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:53, 17 December 2008 | 790 × 500 (202 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|A graph of the relative change in mass of selected kilogram prototypes. From ''The Third Periodic Verification of National Prototypes of the Kilogram (1988â1992)'', G. Girard, |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 09:09, 11 December 2007 |
Color space | Uncalibrated |