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O-LevelPhysicsForces5054/12 · Oct/Nov 2018 · Q161 Mark

A long tube, full of mercury, is inverted in a small dish of mercury. The mercury level in the tube falls, leaving a vacuum at the top. When the atmospheric pressure decreases, which length decreases?

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APQ

BPS

CQR

DRS

✓ Correct answer

C: QR

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About this question

Topic: Forces, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2018 Paper 1 Variant 2, question 16.

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