Practice question
Question
What is the total pressure at a depth of 1.8m in oxygen liquid (ρ\=1.43kg/m3) with atmospheric pressure 1.01×105Pa? (Take g\=9.8m/s2)
Explanation
Total pressure: P = Pa+ρgh. Pa = 1.01×105Pa, ρ = 1.43kg/m3, g = 9.8m/s2, h = 1.8m. P = 1.01×105+1.43×9.8×1.8 = 1.01×105+25.21 = 1.0102521×105Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.01 × 10⁵ Pa. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.