Final answer:
The sources are classified as primary or secondary based on their nature and purpose.
Step-by-step explanation:
1. A newspaper article on the current financial conditions in the U.S. is a secondary source as it provides analysis and interpretation of the information.
2. A magazine article on Nobel Prize-winning authors in the past decade is a secondary source as it presents an analysis of the subject.
3. The U.S. Universal Declaration of Human Rights is a primary source as it is an official document from the time period it represents.
4. An article by a political activist on countries with a poor record of protecting human rights is a secondary source as it offers an opinion and interpretation.
5. The diary of a Nobel Prize-winning author published after the author's death is a primary source as it provides a firsthand account of the author's experiences.
6. A report on the current financial conditions prepared by the U.S. Department of Commerce is a secondary source as it presents an analysis and interpretation of the data.