From the quote marks you put around "centimeters", I can see that you
understand that 'centimeters' is not actually a unit of time, and that you're
using it to represent some actual legitimate unit of time.
But you haven't explained the relationship between the word you used and
the unit you're using it to represent, so I don'[t have the information I need
to make the conversion.
answer
The earth rotates once every 23 hours, 56 minutes and 4.09053 seconds, called the sidereal period, and its circumference is roughly 40,075 kilometers. Thus, the surface of the earth at the equator moves at a speed of 460 meters per second--or roughly 1,000 miles per hour
Fresh water and salt water together cover 3/4 of the earth's surface.
