JAMB - Physics (2000 - No. 18) | ExamPlay

दाखिल करना

JAMB - Physics (2000 - No. 18)

The main reason for making the cover of a vacuum flask airtight is to prevent heat loss by

convection

conduction

radiation

evaporation

स्पष्टीकरण

The airtight stopper prevents heat loss by convection because it is tightly sealed.

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