Latitude and longitude Is an invisible line that divides the earth in half..(Prime Meridian)
The science of adjusting environments, tasks, or procedures to fit the individual is ERGONOMICS. In other words, it is also defined as the study of a worker's efficiency in a workplace and how this efficiency can be improved together with the well-being of the worker.
Louisiana purchase of 1803 doubled the size of the united State give the country complete control of the port of new Orleans, and provided territory for westward expansion.