Question

define a second in terms of rotation of earth....????​

Answer 1

Explanation:-

There is an elegant, simple, and entirely accurate way to define the second. A second is 1/86,400 of the time that it takes the Earth to rotate once on its axis. With 24 hours in a day, 60 minutes per hour, and 60 seconds per minute, there are 86,400 seconds in a day.