Nadir is employed during remote sensing of the atmosphere, as well as when an astronaut faces the Earth while performing a spacewalk. The term nadir can also be used to represent the lowest point reached by a celestial body during its apparent orbit around a given point of observation. This can be used to describe the location of the Sun, but it is only technically accurate for one latitude at a time and only possible at the low latitudes. The sun is said to be at the nadir at a location when it is at the zenith at the location's antipode
Tendency of the rate of profit to fall something, but it does not necessarily help to create profit for one reason or another. What interests a businessman in a financial sense, is the cost of labor which directly creates the product or service that generates profit, versus the cost of labor that is effectively only a necessary overhead expense for his own business. The general aim is, to maximize productive labor in this sense, and minimize unproductive costs. That is the efficiency principle that guides the development of the division of labor organizationally. For example, tasks that are not part of the "core business" are outsourced to other