One light year is equal to?
 

Total uncertainty, in result obtained from the subtraction of two measurement, is equal to?

An ideal standard of measurement of a base quantity has characteristics

Which one is the highest power multiple?

Steradian is the SI unit of?
 

Absolute uncertainty in a measurement depends upon?
 

The unit of force is _________ and its symbol is __________. Which is the correct pair?
 

One pico stands for?
 

How many main frontiers of fundamental science?

Unit of G is?