Mechanical waves require a medium to travel through. Examples of mechanical waves are sound waves, water waves, a vibrating string. (See related link). Electromagnetic waves â¦(such as light, radio waves, X-rays, microwaves) do not need a medium to travel through, so these are not mechanical waves.
Photostat definition, a camera for making facsimile copies of documents, drawings, etc., in the form of paper negatives on which the positions of lines, objects, etc., in the originals are maintained. a copy made with this camera.
Stat, an abbreviation of photostat. Stat, an abbreviation of the Latin statim, immediately, often used in medical contexts such as in hospital emergency rooms. Stat, an abbreviation of statistic. Stat, an abbreviation of statistics, more commonly stats in British English contexts.