The Main-Sequence: The star now settles down to a long period of stability while the hydrogen at its centre is converted into helium with the release of an enormous amount of energy. This stage is called the main-sequence stage, a reference to the classical Hertsprung-Russell diagram (see the Figure below). Most stars lie in a well defined band in the diagram, and the only parameter that determines where in the band they lie is the star's mass.
Becoming a Professional Engineer (PE) A Professional Engineer (PE) is an engineer certified by a state board of registration to practice engineering. The PE license is the engineering profession's highest standard of competence, a symbol of achievement and assurance of quality. The College of Engineering believes that professional registration is an important goal for engineering graduates. Passing the FE Exam is the first step toward that goal.
What is Mechanical Engineering? Mechanical engineering is a diverse subject that derives its breadth from the need to design and manufacture everything from small individual parts and devices (e.g., microscale sensors and inkjet printer nozzles) to large systems (e.g., spacecraft and machine tools).