Question

Define One Second ? Answer: One part of 86400 seconds is called One Second

Answer 1

Explanation:

a second is called a second because it is the second division of the hour by 60, the first being a minute.

Answer 2

• The second is the Standard International ( SI ) unit of time.
• One second is the time that elapses during 9,192,631,770 (9.192631770 x 10 9 ) cycles of the radiation produced by the transition between two levels of the cesium 133 atoms.
• One second is equal to 1/86,400 of a mean solar day.