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JAMB Physics 2005 Question 40

Question 40

Pressure

Two liquids L1 and L2 are contained in a U-tube. The height and the density of L1 are 8 cm and 103 kgm−3 respectively. If the density of L2 is 800 kgm−3, its height measured from the same level is

  1. A.8 cm.
  2. B.16 cm.
  3. C.12 cm.
  4. D.10 cm.
Show the answer and explanation

Answer: D (10 cm.)

Explanation

Pressures balance: h1ρ1 = h2ρ2, so h2 = 8 × 1000/800 = 10 cm.