Practice question

Given: A mercury barometer shows a height of 75 cm at sea level. What is the atmospheric pressure? ( rho = 13.6 × 10³kg/m³, g = 10 m/s² ) These values define the system as per NCERT data. Formula: P_a = rho g h. This is standard NCERT relation. Substitution & Calculation: rho = 13.6 × 10³kg/m³, g = 10 m/s², h = 0.75 m . P_a = 13.6 × 10³ × 10 × 0.75 = 1.02 × 10⁵Pa . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.