Revolution means a turning movement (→ rotation ) in connection with the specification of a number . When specifying, for example, "5 revolutions", the term revolution has the meaning of an auxiliary unit of measurement - comparable e.g. B. with a time specification of "5 seconds", where the second has the meaning of a unit of measurement .
The number of revolutions per time is referred to as speed or frequency of rotation . Usually the counted revolutions are given in the unit per minute (min −1 ) and the common English term rpm (revolutions per minute) or rpm (revolutions per minute) is used. Such a rotation frequency can, however, also be specified in Hertz (Hz).
- thefreedictionary.com: rotation