The height at which the atmosphere cases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20k...

Assessment: JAMB UTME - Physics - 2019 Subject: Physics

Question 1 Report

The height at which the atmosphere cases to exist is about 80km. If the atmospheric pressure on the ground level is 760mmHg, the pressure at a height of 20km above the ground level is

\((\rho_m = 13.6g/cm^3\ \rho = 0.00013g/cm^3)\)

Answer Details

ρ m h m  = ρ a h a
13.68(760 - p) × 10 − 3  = 13 × 10 − 5 (20 × 10 3 )

760 - p = 13 × 10 − 5  × 20 × 10 3 13.68 × 10 − 3 = 19.00 × 10 1

760 - p = 190
p = 760 - 190 = 570mmHg

Read lesson note on Pressure (JAMB)
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