Which of the following is a complete measurement?

Why were standard units introduced?

Which SI base unit and symbol are correctly matched?

Which statement correctly describes a non-physical quantity?

Which derived unit is equivalent to metre per second?

Which rounding rule applies when the first dropped digit is less than 5?

Which prefix represents 10^-9?

When rounding off, if the first dropped digit is greater than 5, the retained digit is:

A time interval of 2000 microseconds is equal to:

If repeated readings are close to each other but not near the true value, they are:

Which expression is written in proper scientific notation?