The maximum weight for a U.S. semi truck and full trailer is 80,000 pounds spread over 18 conventional wheels. Out in the wide-open spaces of Australia, however, road trains can have four trailers and weigh in excess of 300,000 pounds.
Types of academic source. Sources such as newspaper articles, magazine articles, opinion pieces, and websites are not commonly academic, although there are some exceptions. Many journal articles and reports can be found online, for example. Academic journals are very different from popular magazines, although they bear several similarities.
Organizing Research for Arts and Humanities Papers and Theses: What are Scholarly and Non-Scholarly Sources. What is a Scholarly Source. Both scholarly and non-scholarly materials have a place in arts and humanities research. Their use, and even their definition, depends on the context of the research project. The authors cite other sources, be they primary or secondary.