What is the need for measurement of a physical quantity?

The reference standard used for the measurement of a physical quantity is called

Let x={:[(a^(2)b^(2))/(c)]:} be the physical quantity. If the percentage error in the measurement of physical quantities a,b, and c is 2,3 and 4 per cent respectively, then percentage error in the measurement of x is

What is the need of biomolecules?

Choose the correct alternative and write it along with its alloted alphabet: The vapour content in the air is measured using a physical quantity called ………...

Explain the need for making measurement.

In the measurement of a physical quantity X = (A^(2)B)/(C^(1//3)D^(3)) . The percentage errors introduced in the measurement of the quantites A,B,C and D are 1%, 3% , 4% and 5% respectively . Then the minimum amount of percenatage of error in the measurment of X is contributed by

Explain with example, how is dimensional analysis used to convert the unit of a physical quantity from one system to another system of units.

What is the unit of measuring the Noise?