Hour glass was used in past days to know

Electronic stop watch gives a display of digital reading along with accuracy up to

For very short intervals we mostly use

The apparatus commonly used to measure volume of liquids is

The standard meter is defined as the distance which is travelled by light in 1/299 792 458 of a second through

Substances which larger masses are usually measured in

An instrument which gives a level of high accuracy than mechanical watch is

In SI system the unit of area is

Types of balance includes

Sonya is tall is the observation which is

An average speed of an aero plane is equal to

Mercury thermometer is used to measure exact

The standard unit of time according to SI system is

A single system on which all scientists all over the world agree for units of measurement is called

Volume of seashells, pebbles and keys can be measured by

The length of distance which is covered in specific time is called

The first made instrument by Egyptians in year 800 BC for measuring time was

The special feature of a Vernier caliper is that it can measure up to

If symbol of units is a capital letter still its unit name will start from

To change SI units by factors of ten into smaller or bigger units they uses