1 The English language is constantly adding words to its repertoire. 2  Each year you may see a few creep into the vernacular that don't appear in the dictionary. 3  They could appeaâ¦. 4  Helping a Young Girl Understand Her First Menstrual Period Most girls experience their first menstrual period between the ages of 12 and 13.
It is also the length of a sidereal day -- the time it takes the earth to rotate 360Â°. A sidereal day could be measured using fixed stars. In conclusion the actual period of rotation of the earth is 23 hours 56 minutes and 4 seconds or 86,164 seconds.
A rotation is when the earth spins.It takes 24 hours to rotate fully one time. The side facing the sun is in daylight, the side facing away is in night.An interesting fact is that in order for us to experience 365 days in a year, the Earth has to rotate 366 times as it revolves around the sun in that year. The most common use of the term rotation in math is in geometry. It is a form of translation, which is motion. Rotation refers to spinning about an axis point and is m â¦ easured in degrees, up to 360. It is often coupled with reflection to describe the motion of the object.