I would assume the question should read: how many microseconds in a second.
mili second is 10-3 or 1000 milliseconds in a second.
micro second is 10-6, or 1,000,000 micro seconds in a second.
In the metric system, how many milliseconds are needed to make one second?
1000
A billion.
1000
1000
1,000,000
1 second = 1012 picoseconds = 1 trillion = 1,000,000,000,000
One trillion. (10^-12) 1,000,000,000,000
how many simple machine are needed to make a compound machine
3 and a half moons are needed to make the earth!(:
13 ocelots are needed to make 1 fur coat
6 sides are needed