What is the least count of a meter scale? 

Harish runs faster than Ashok in a given length. To compare the Harish and Ashok in this fundamental physical quantities involved are:

The length of a curved surface is measured by using

One centimetre on a scale is divided into 20 equal divisions. The least count of this scale is: 

The unit of length in F.P.S system is

The unit of length in M.K.S system is

Light year is the unit of

1 deca m = ____ m

1 nm = ____ m

1 pm = _____ m