Question 11
Density and UpthrustThe figure above shows the heights of two liquids X and Y when some air is sucked out of the apparatus through the pump P. The diameter of the table in X is twice that of the tube in Y. What is the relative density of liquid X with respect to liquid Y?
- A.1/3
- B.2/3
- C.3
- D.6
Show the answer and explanation
Answer: C (3)
Explanation
Both columns are held up by the same pressure difference, so ρX × 7.5 = ρY × 22.5, giving ρX/ρY = 3. The tube diameter does not matter.