1. What do you mean by measurement?. 2. Define unit.
3. What is SI unit?
4. What are fundamental and derived quantities? Give examples.
5. Write any five derived quantities and their SI units.
Answers
Answer:
Measurement :the action of measuring something. the size, length, or amount of something, as established by measuring. a unit or system of measuring.
Unit :an individual thing or person regarded as single and complete but which can also form an individual component of a larger or more complex whole. a device that has a specified function, especially one forming part of a complex mechanism.
SI unit :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 length, the kilogram for mass, the ampere for electric current, the kelvin for thermodynamic 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 technology.
Fundamental and derived quantities: Fundamental quantities are those that are defined directly by the process of measurement only. ... Derived quantities : The quantities, which can be expressed in terms of the fundamental quantities are called derived quantities. For example volume, velocity, Pressure etc.
Derived quantities and Sl units: SI derived units are units of measurement derived from the seven base units specified by the International System of Units (SI). They are either dimensionless or can be expressed as a product of one or more of the base units, possibly scaled by an appropriate power of exponentiation.