I think you mean "milliseconds". The prefix "milli" is used in the metric system of measurements to mean "one thousandth of", so a "millisecond" is one thousandth of a second, which means that there must be 1000 of them in 1 second.
It how many frames pass in front of the projector lens in a second. Old projectors used to use 16 FPS, newer ones use 24 FPS.
Which is best used to measure length of a pencil
1 second = 1 trillion picoseconds.
The answer depends on the units used for 39.51 It should be blindingly obvious to anybody that the answer for 39.51 microseconds and 39.51 days, for example, will be very different.
The answer will depend on the units used for 343200. Are they days, hours, minutes, seconds, milliseconds, microseconds? Since you have not bothered to provide that information, I cannot provide a sensible answer.
The word are is used for both the singular and plural of the second person, while it is used for the plural of the third person. The English language does not make as many grammatical distinctions as many other languages do.
The processes (fission and fusion) that release energy in nuclear explosions complete in from about 10 microseconds to about 50 microseconds depending on the exact design used. How far a falling bomb might move in that time will depend on its velocity, but this distance will be insignificant compared to the diameter of the fireball.
It is the second part. light independent reaction is the second
There are many plants that are used to flavour ice cream but not to make it.
the most widely used second language is actually English since many other countries besides north America and Canada use it as a dependent second language.
A DNA strand is used to make a strand of RNA.