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File:Aluminium oxide2.jpg

Aluminium_oxide2.jpg ‎(571 × 560 pixels, file size: 63 KB, MIME type: image/jpeg)

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Description
English: Aluminium oxide skimmed off the surface of molten aluminium.
Čeština: Oxid hlinitý odebraný z povrchu taveniny hliníku
Date (UTC)
Source
Author


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 is a retouched picture, which means that it has been digitally altered from its original version. Modifications: converted to JPG + minor crop. The original can be viewed here: Aluminium oxide2.png: .

I, the copyright holder of this work, hereby publish it under the following license:
Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Original upload log

This image is a derivative work of the following images:

  • File:Aluminium_oxide2.png licensed with PD-self
    • 2008-04-14T04:25:35Z Nbritton 1137x1080 (2116080 Bytes) {{Information |Description=Aluminium oxide skimmed off the surface of molten aluminium. |Source=self-made |Date=2008 |Author= [[User:Nbritton|Nbritton]] |Permission=Public Domain }}

Uploaded with derivativeFX

Captions

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Items portrayed in this file

depicts

aluminium oxide

inception

28 September 2009

MIME type

image/jpeg

checksum

0edb33f685ddbd3cc26fff33bc21c5a1d1e17d1f

determination method: SHA-1

data size

64,415 byte

height

560 pixel

width

571 pixel

File history

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Date/TimeDimensionsUserComment
current17:26, 27 September 2009571 × 560 (63 KB)Materialscientist{{Information |Description=Aluminium oxide skimmed off the surface of molten aluminium. |Source=*File:Aluminium_oxide2.png |Date=2009-09-28 00:24 (UTC) |Author=*File:Aluminium_oxide2.png: Nbritton *derivative work: ~~~ |Permi

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