Multiple choice

A billionth of a second is defined as a

  1. millisecond

  2. microsecond

  3. nanosecond

  4. picosecond

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A nanosecond is defined as 10^-9 seconds, which is one billionth of a second. A microsecond is 10^-6, and a millisecond is 10^-3.