"Life plus 20 years" refers to the duration of copyright protection, which lasts for the life of the creator plus an additional 20 years after their death. This means that the copyright on a work remains in effect for 20 years after the creator passes away.
Copyright law and the duration of copyright, varies somewhat from country to country. International treaties set a duration of the life of the creator plus 50 years. In the US it is life plus 70 years. There are different terms for works made for hire - that is, by an employee of a firm. Copyright law applies to photographs as well as written works, regardless of the purpose or use of the item. Because copyright law has changed over the years, copyright status may be different for older photographs and for different countries at different times.
Works in Canada are protected for the life of the author plus 50 years.
Works are protected for the life of the author plus 50 years.
Books are protected for the life of the author plus 50 years in most countries; the US and some others have extended this to life plus 70 years. The popularity of the book is unrelated to the term of copyright protection.
Under current US law copyright protection extends through the life of the author and to the end of the calendar year 70 years past the authors death.
An anonymous work that is registered with the US Copyright office will receive the same protection as as any other work. It's duration will vary depending on if the author reveals and verifies his or her identity. It the author remains anonymous, the duration will last 95 years from the initial publication or 120 years from the creation of the work according to 17 U.S.C §302(c). If the author does reveal and verify their identity the copyright duration will be the life of the author plus 70 years.
The Copyright Act 1994 is still in effect, although it was significantly updated by the Copyright (New Technologies) Amendment Act 2008. The duration of protection under the act varies slightly by the type of work, but is generally the life of the creator plus 50 years. See the link below for details.
The duration of Five Years in the Life is 1800.0 seconds.
if a juvenial 5 years with a fine of 250,000 without bail
Until 2005, works were protected for the life of the creator plus 50 years. This was extended to life plus 70 years, but copyright was not revived on works that were already in the public domain.
It depends on when and where the work was created, the type of work, and more. Broadly speaking, most works are protected for the life of the creator plus at least 50 years (the US and some other countries have extended this to 70 years). Ultimately you will need to research each work individually to determine its status.
Term of copyright is for the life of the creator plus 70 years.