The air in an automobile tyre with a volume of 0.015 m3 is at 30°C and 140 kPa. Determine the amount of air that must be added to increase the pressure to 210 kPa. Assume atm. pressure to be 100 kPa and temperature and volume to remain constant, assuming Ideal gas equation.

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.