2009
Physics
67e856d33cf20db308447ec1
The height at which the atmosphere ceases to exist is about 80km, if the atmosphere pressure on the ground level is 760mmHg, the pressure at height of 20km above the ground is
A.
380mmHg
B.
570mmHg
C.
190mmHg
D.
480mmHg
Correct Answer: 190mmHg
Explanation
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