Datoteka:PerliteUSGOV.jpg

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PerliteUSGOV.jpg ‎((486 × 418 piksela, veličina datoteke: 46 KB, <a href="/wiki/MIME" title="MIME">MIME</a> tip: image/jpeg))


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Description: Perlite (volcanic glass with white powder appearance). Perlite is a volcanic glass that has many industrial applications, because of its light density and insulating properties.

Source: USGSS (dead link; Archived)

Transferred from the English language wikipedia Johan Lont at 11:53, 1 Feb 2005 (UTC). Original upload by w:en:User:Chris 73.


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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Public domain 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.

Opisi

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Photograph of pieces of perlite beside an American penny to indicate scale.

Predmeti prikazani u ovoj datoteci

motiv

vrsta medija

image/jpeg

data size engleski

47 080 Bajt

visina

418 točka

širina

486 točka

checksum engleski

5676936d6a841c1243f95022020cd8c165083719

način određivanja: SHA-1

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Datum/VrijemeMinijaturaDimenzijeSuradnikKomentar
sadašnja11:57, 7. svibanj 2011.Minijatura za inačicu od 11:57, 7. svibanj 2011.486 × 418 (46 KB)wikimediacommons>Materialscientistcrop whitespace (plate is not the object)

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