At the heart of the SI is a short list of base units defined in an absolute way without referring to any other units. The base units are consistent with the part of the metric system called the MKS system. In all there are seven SI base units: 1  the meter for distance, 2  the kilogram for mass, 3  the second for time, 4  the ampere for electric current, 5  the kelvin for temperature, 6  the mole for amount of substance, and. 7  the candela for intensity of light.
AA as an academic degree stands for Associates of Arts. The difference between Associates of Arts, Associates of Science, and Associates of Applied Science: Associate degrees fall into three main areas. Associates of Arts (AA)
  The AA degree is Associates of Arts The AA degree is a two year program that fulfills the requirements leading up to the BA degree (an additional 2 years beyond the AA â¦ degree) All the credits earned for the AA degree can transfer to a 4 year university.n the other hand the B.Tech Degree is offered in the courses where the material and the syllabus is more of a practical field. In B.E degree, one studies the material in more detail and depth, whereas in B.Tech degree one concentrates more on the skills and the practical application of the course.