Datoteka:US radium standard 1927.jpg

Sadržaj stranice nije podržan na drugim jezicima.
S Wikipedije, slobodne enciklopedije

Izvorna datoteka ‎(1.222 × 634 piksela, veličina datoteke: 171 KB, MIME tip: image/jpeg)

Sažetak

Opis
English: Sealed glass tube of radium chloride kept by the US Bureau of Standards that served as the primary standard of radioactivity for the United States in 1927, and several subsidiary working standards. . This was officially known as the "Secondary radium standard no. 6" which had in 1913 been calibrated against the International Radium Standard, a similar tube of radium chloride prepared by Marie Curie, kept by the Bureau Internationale des Poids et Measures (International Bureau of Weights and Measures) at Sevres, France. This was determined to contain 20.68 mg of radium chloride, corresponding to 15.44 mg of radium in 1913. Since radium decays at a rate of about 1% in 25 years, at the time of this picture it was estimated to contain 15.360 mg of radium
Datum
Izvor Retrieved January 19, 2014 from Standards Yearbook 1927, US National Bureau of Standards, Dept. of Commerce, printed by US Government Printing Office, Washington D.C., p. 399, fig. 30 on Google Books
Autor George K. Burgess, Director, US National Bureau of Standards

Licenciranje

Public domain
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code. Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
Ova datoteka je identificirana kao slobodna od poznatih ograničenja po zakonu o autorskim pravima, uključujući sva povezana i srodna prava.

Captions

Add a one-line explanation of what this file represents
Standard glass tubes of radium chloride

Items portrayed in this file

prikazuje

Historija datoteke

Kliknite na datum/vrijeme da vidite verziju datoteke iz tog vremena.

Datum/vrijemeSmanjeni pregledDimenzijeKorisnikKomentar
trenutno12:55, 7 oktobar 2015Smanjeni pregled verzije na dan 12:55, 7 oktobar 20151.222 × 634 (171 KB)ChetvornoUser created page with UploadWizard

Sljedeća stranica koristi ovu datoteku:

Globalna upotreba datoteke

Sljedeći wikiji koriste ovu datoteku:

Metapodaci

Ova datoteka sadržava dodatne podatke koje je vjerovatno dodala digitalna kamera ili skener u procesu snimanja, odnosno digitalizacije. Ako je datoteka mijenjana, podaci možda nisu u skladu sa stvarnim stanjem.

Preuzeto iz "https://bs.wikipedia.org/wiki/Datoteka:US_radium_standard_1927.jpg"