How do I convert 5nano second to second?

5 * 10^-9 = 0.000000005

by the way if you just type

5 nano seconds = seconds
into your Google or whatever search engine
You will probably see the answer pop up

To convert from nanoseconds (ns) to seconds (s), you need to use the conversion factor that relates the two units. In this case, the conversion factor is:

1 second = 1,000,000,000 nanoseconds

To convert 5 nanoseconds to seconds, you divide the value by the conversion factor:

5 ns ÷ 1,000,000,000 = 0.000000005 seconds

Therefore, 5 nanoseconds is equal to 0.000000005 seconds.