Which SI prefix represents 10^3?

The unit coulomb can be expressed in terms of base units as:

Which prefix should be used for 10^-6?

Which derived quantity is expressed in pascal?

Which prefix has the symbol n?

Which expression represents the SI unit of speed?

Why are prefixes used with SI units?

The unit of area is derived by multiplying:

Which conversion is correct?

Which of the following is a derived unit?

Which value is equal to 2 ms?