ï»¿ Which one of the following represents the correct dimensions of the coefficient of viscosity? from Physics Units and Measurement Class 11 Manipur Board

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Which one of the following represents the correct dimensions of the coefficient of viscosity?

• MLâˆ’1Â Tâˆ’2

• MLTâˆ’1

• MLâˆ’1Â Tâˆ’1

• MLâˆ’2Â Tâˆ’2

C.

MLâˆ’1Â Tâˆ’1

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What is measurement?

Measurement is the process of attaching a numeric value to an aspect of a natural phenomenon. Measurement is making the quantitative knowledge of a physical quantity.
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Define unit.

The quantity used as a standard of measurement is called unit.

Example: Unit of time is second.

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Give four examples of physical quantities.

Examples of Physical quantitie are force, mass, density and power.
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Define physical quantity.

A measurable quantity in terms of which laws of Physics can be expressed is called physical quantity.

The result of a measurement of a physical quantity is expressed by a number accompanied by a unit.

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What is the need of measurement?

To get the complete knowledge of any physical quantity, measurement is needed. Measurement of any physical quantity involves comparison with a certain basic, arbitrarily chosen, internationally accepted reference standard called unit. Knowledge without measurement is incomplete and unsatisfactory.
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