Height is the measurement of vertical distance, but has two meanings in common use. It can either indicate how "tall" something is, or how "high up" it is. For example one could say "That is a tall building", or "That airplane is high up in the sky". These can both be referred to as the height of the object, as in "The height of the building is 50m" or "The height of the airplane is 10 000m". When used to describe how high something like an airplane or mountain peak is from sea level, height is more often called altitude. Height is measured along the vertical (y) axis between a specified point and another point.
Instead of using the sea-level, geodesists often prefer to define height from the surface of a reference ellipsoid, see Geodetic system, vertical datum.
Defining the height of geographic landmarks becomes a question of reference. For example, the highest mountain by elevation in reference to sea-level belongs to Mount Everest, located on the border of Nepal and Tibet; however the highest mountain by measurement of apex to base belongs to Mauna Kea in Hawaii, United States.
The United Nations uses height (among other statistics) to monitor nutritional standards in developing nations. In human populations, average height can distill down complex data about the group's birth, upbringing, social class, diet, and health care system. However, the height of a human is not always directly connected or related to such things as nutrition, social class, etc.
Hard milling by the numbers: here are some speeds, feed rates and depths of cut for a productive hard milling process.
Apr 01, 2008; [ILLUSTRATIONS OMITTED] The problem with switching to a new and different method of machining is that your old and established...