1.5 days = 1.29600 × 1014 nanoseconds.
3.154e+31
It takes 1.3 to 1.4 nanoseconds for light to travel 1 foot.
I could write 1 femtosecond as "1 femtosecond" : not a zero in sight. or as 0.000001 nanoseconds (6 zeros) or .000001 nanoseconds (5 zeros) 1 fs = 10-15 seconds so there are 14 0s between the decimal point and the 1.
1 nanoseconds = 1 nanoseconds. And that is the decimal form of a nanoseconds in nanoseconds. It can also be written as 1000 picoseconds or 0.000000000000001 megaseconds but such representations depend on what unit is being used. None has been specified in the question.
There are 1,000,000,000 nanoseconds in a second. There are 1x60x60x24x365.25 or 31,557,600 seconds in a year. So nanoseconds in a second is over 60 times more
473,099,999,999,999,936 nanoseconds.
3.1536E+24 nanoseconds.
5.9327x10 ^19 nanoseconds
1 microsecond = 1,000 nanoseconds.
Six years = 1.89216e17 nanoseconds.
1 second = 1000000000 nanoseconds
24 hours = 86,400,000,000,000 Nanoseconds
20,000,000,000 nanoseconds = ~0.333 minutes.
1 day = 8.64e13 nanoseconds.
9.5 years = 299,629,999,999,999,936 nanoseconds.
5 milliseconds = 5 million nanoseconds.
10 milliseconds = 10 million nanoseconds