3600 second in one hour.
3600 seconds
There is only one second in one second.
72pulse for one second
1000
One arc second is one 3600th of a degree.
1 second, because one squared is still one, therefore, one second squared is still one.
1,000 milliseconds in one second.
1 second = 1000000000 nanoseconds
1,000,000,000 109 one billion
One micro second
There are 1,000 milliseconds in one second.
1024
1000