Question

Long answer question.

1. What is measurement ? How is the measurement expressed?
2. What is the S.I unit of ( 1 ) mass (2 ) length ( 3 ) time and ( 4 ) temperature? Write the name and symbol​

Answer 1

Answer:

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Answer 2

Answer:

1)Measurement is a comparison of an unknown quantity with a known fixed quantity of the same kind. The value obtained on measuring a quantity is called its magnitude. The magnitude of a quantity is expressed as numbers in its unit.

2)The SI base units are the standard units of measurement defined by the International System of Units (SI) for the seven base quantities of what is now known as the International System of Quantities: they are notably a basic set from which all other SI units can be derived. The units and their physical quantities are the second for time, the metre for measurement of length, the kilogram for mass, the ampere for electric current, the kelvin for temperature, the mole for amount of substance, and the candela for luminous intensity. The SI base units are a fundamental part of modern metrology, and thus part of the foundation of modern science and technolog

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