Practice question
Question
What is the total pressure at a depth of 2.8m in whole blood (ρ\=1.06×103kg/m3) with atmospheric pressure 1.01×105Pa? (Take g\=9.8m/s2)
Explanation
Total pressure: P = Pa+ρgh. Pa = 1.01×105Pa, ρ = 1.06×103kg/m3, g = 9.8m/s2, h = 2.8m. P = 1.01×105+1.06×103×9.8×2.8 = 1.01×105+29094.4 = 1.300944×105Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.30 × 10⁵ Pa. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.