For $30, students can purchase the AAMC publication The Official Guide to the MCAT Exam.. The online self-assessment package is available for $104, and seven additional practice exams are available for $35 each. MOOCs: Massive Online Open Courses are online classes that are essentially open to the public.
Zeppelin was invented in 1900 by a military officer of German origin named Count Ferdinand von Zeppelin.It was a stiff framed airship, LZ-I that flew on 2nd July, 1900 carrying five passengers near Lake Constance in Germany. Zeppelins were used in the times of peace as well as war.eppelin was invented in 1900 by a military officer of German origin named Count Ferdinand von Zeppelin.
The history of radar will show that it began in 1904. German engineer Christian Hulsmeyer created an apparatus capable of detecting an objectâs presence some distance away. However, no single scientist invented the modern radar; scientists from several nations worked on it, especially during the 1930s and 40s.ulsmeyer received a patent for his invention in 1904. However it was Nikola Tesla who discovered that frequency could be used to detect the presence of vehicles as well as their course. The succeeding years saw American and European scientists develop various radar devices.