A manometer attached to a sealed flask shows a gauge reading of −30 kPa

PHYSICS · Subjective · CBSE · Physics · Mechanical Properties of Fluids · Mechanical Properties of Fluids

Problem

A manometer attached to a sealed flask shows a gauge reading of −30 kPa. Explain in one or two sentences why the absolute pressure inside the flask is still a positive quantity even though the gauge reading is negative.

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