SAT is the abbreviation for Scholastic Aptitude Test, which is an exam that must be taken when applying to almost all universities in the United States. Generally, high school students who wish to pursue higher education need to take the SAT, and the SAT score is one of the important criteria for obtaining scholarships. Most American universities require the SAT as a condition for admission and award scholarships based on SAT scores.
**Scalar**
A quantity that possesses a magnitude but not a direction. Mass and length are common examples.
**Second Law of Thermodynamics**
There are several versions of this law.