Physics · Oct / Nov 2018 · Paper 12 · Question 16
5054Pressure
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?
- APQ
- BPS
- CQR
- DRS
As printed in the paper
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Correct answer: C. QR
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