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Opis izmjene
Rare earth ore, with a cent for size comparison
Source: US Government archive copy at the Wayback Machine
This image has currency in it to indicate scale.
Using coins for scale is discouraged as it will require people unfamiliar with them to look up the dimensions or guess, both of which defeat the purpose of the object in the first place. Coins can also reinforce a geographical bias, and some coins' designs are copyrighted .
Ideally, a photograph should include a ruler with the subject (example ) or an added scale marking.
SI ("metric") units are the most commonly used worldwide (see meter and centimeter ).
Images with coins to indicate scale
Common coin diameters for reference:
U.S. dollar (as of?):
1¢: 19.05 mm, 0.75 in
5¢: 21.21 mm, 0.84 in
10¢: 17.91 mm, 0.71 in
25¢: 24.26 mm, 0.94 in
50¢: 30.61 mm, 1.22 in
$1: 26.5 mm, 1.02 in
Canadian dollar (as of?):
1¢: 19.05 mm, 0.75 in
5¢: 21.2 mm, 0.83 in
10¢: 18.03 mm, 0.71 in
25¢: 23.88 mm, 0.94 in
50¢: 27.13 mm, 1.07 in
$1: 26.5 mm, 1.02 in
$2: 28 mm, 1.1 in
Pound sterling as of 2021:
1p: 20.32 mm, 0.8 in
2p: 25.91 mm, 1.02 in
5p: 18 mm, 0.71 in
10p: 24.5 mm, 0.96 in
20p: 21.4 mm, 0.84 in
50p: 27.3 mm, 1.07 in
£1: 23.03–23.43 mm, 0.91–0.92 in
£2: 28.4 mm, 1.12 in
Euro as of 2002:
1c: 16.25 mm, 0.64 in
2c: 18.75 mm, 0.74 in
5c: 21.25 mm, 0.84 in
10c: 19.75 mm, 0.78 in
20c: 22.25 mm, 0.88 in
50c: 24.25 mm, 0.95 in
€1: 23.25 mm, 0.92 in
€2: 25.75 mm, 1.01 in
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This image is a work of the "Minerals in Your World" project, a cooperative effort between the United States Geological Survey and the Mineral Information Institute . The images were featured in the "Minerals and Materials Photo Gallery" on the website of the U.S House Subcommittee on Energy and Natural Resources. As a work of the U.S. federal government , the image is in the public domain in the United States.
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aktualna 10:07, 29 septembar 2005 600 × 451 (63 kB) Halfdan Rare earth ore, with a cent for size comparison Source: [http://resourcescommittee.house.gov/subcommittees/emr/usgsweb/photogallery/ US Government] {{PD-USGov-Interior-USGS-Minerals}}
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