The second, defined as the time taken for a specific number of vibrations in a particular isotope of caesium.
second
The base unit for time is the second.
The second (s)
seconds
It's the "second".
The base unit of time is the second.
The basic unit of electric current is the ampere (A), which represents the flow of electric charge through a given point in a circuit per unit of time.
seconds everyone knows that
It's the "second".
seconds
It is the basic unit of time in both systems.
The unit of time in both the SI and the "customary" systemsis the second.