Cobalt_OreUSGOV.jpg (300 × 432 بكسل حجم الملف: 45 كيلوبايت، نوع MIME: image/jpeg)

ملخص

العربية: خام الكوبالت
English: Cobalt ore


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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Source: http://resourcescommittee.house.gov/subcommittees/emr/usgsweb/photogallery/ نسخة مؤرشفة في Wayback Machine ; English Wikipedia, original upload 3 August 2004 by Chris 73 en:Image:Cobalt OreUSGOV.jpg

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.


en:Image:Cobalt OreUSGOV.jpg

الشروحات

خام الكوبالت

العناصر المصورة في هذا الملف

يُصوِّر

256505e06d1fd4c5e0460f9ad0ee56bdbd3df7f9

٤٦٬١٦٨ بايت

٤٣٢ بكسل

٣٠٠ بكسل

تاريخ الملف

اضغط على زمن/تاريخ لرؤية الملف كما بدا في هذا الزمن.

زمن/تاريخصورة مصغرةالأبعادمستخدمتعليق
حالي22:33، 8 سبتمبر 2009تصغير للنسخة بتاريخ 22:33، 8 سبتمبر 2009300 × 432 (45 كيلوبايت)Materialscientistcropped "empty" space
05:45، 14 سبتمبر 2005تصغير للنسخة بتاريخ 05:45، 14 سبتمبر 2005600 × 450 (79 كيلوبايت)Saperaud~commonswikiCobalt ore Source: Cobalt, Ores {{PD-USGov-Interior-USGS-Minerals}} Category:http://resourcescommittee.house.gov/subcommittees/emr/usgsweb/photogallery/ ; English Wikipedia[[Category:original upload 3 August 2004 by [[:en:User:Chris 73|Chris 73

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الاستخدام العالمي للملف

الويكيات الأخرى التالية تستخدم هذا الملف:

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