Checked content

File:Pascal's Barrel.png


English: An illustration of Pascal's barrel experiment
Date 1872
Source The forces of nature: a popular introduction to the study of physical phenomena


Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to Australia, the European Union and those countries with a copyright term of life of the author plus 70 years.

Dialog-warning.svg You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years, Russia has 74 years for some authors. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement the rule of the shorter term.

This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights.
Public domain
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1923. See this page for further explanation.
United States
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
The following pages on Schools Wikipedia link to this image (list may be incomplete):


I want to learn more...

SOS Children chose the best bits of Wikipedia to help you learn. More than 2 million people benefit from the global charity work of SOS Children's Villages, and our work in 133 countries around the world is vital to ensuring a better future for vulnerable children. Why not try to find out more about sponsoring a child?