A long tube, completely filled with mercury, is turned upside down in a small dish of mercury. The mercury level inside the tube drops, creating a vacuum at the top. If the atmospheric pressure falls, which length decreases?
- APQ
- BPS
- CQR
- DRS
Physics 5054 · O Level · Pressure
A long tube, completely filled with mercury, is turned upside down in a small dish of mercury. The mercury level inside the tube drops, creating a vacuum at the top. If the atmospheric pressure falls, which length decreases?