alleryStart learning →A tyre gauge reading 200 kilopascals in an atmosphere of 100 kilopascals means the absolute pressure is:
A300 kilopascals
B200 kilopascals
C100 kilopascals
DJust 2 kilopascals
Answer & Solution
Correct answer: A. 300 kilopascals
1. A gauge reading is not the total pressure inside.
2. Gauge pressure is defined to be the pressure relative to atmospheric pressure.
3. The total pressure, or absolute pressure, is the sum of gauge pressure and atmospheric pressure.
4. Here that sum is 200 plus 100 kilopascals.
5. So the absolute pressure is 300 kilopascals.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 11 'Fluid Statics', sections 11.1-11.9_
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