What is mass? Write the effect of external factors on mass.

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(N/A) Mass is defined as the quantity of matter contained in a body.
- Mass is an inherent (fundamental) property of any object.
- Mass does not depend on the temperature,pressure,or location of the object in space.
- The $SI$ unit of mass is the kilogram $(kg)$.
- The prototypes of the international standard kilogram supplied by the International Bureau of Weights and Measures $(BIPM)$ are available in many laboratories across different countries.
- In India,this prototype is available at the National Physical Laboratory $(NPL)$,New Delhi.

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