The overall presentation and the images within this pin represent "gestalt" by symmetry. The gestalt concept says that objects must be balanced or symmetrical in order to be seen as complete or whole. Not only are the images symmetrical, but the presentation is as well.
What is a scalar? A scalar is a quantity that is fully described by a magnitude only. It is described by just a single number. Some examples of scalar quantities include speed, volume, mass, temperature, power, energy, and time. What is a vector? A vector is a quantity that has both a magnitude and a direction. Vector quantities are important in the study of motion. Some examples of vector quantities include force, velocity, acceleration, displacement, and momentum.