Question

what is one second ,write its value in numerical value

Answer 1

Hey☺.here is your answer u r looking for.
"Second" is the S.I unit of time. 1 second mean 1 second time taken by a body..hope this is helpful..

Answer 2

second is the standard international unit for time. second is the time elapse during 9192631770×10.9. cycles of the radiation produce by the transition between two levels of 133 cesium.