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
(Ïm = 13.6g/cm\(^3\) Ï = 0.00013g/cm\(^3\) )
(Ïm = 13.6g/cm\(^3\) Ï = 0.00013g/cm\(^3\) )
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Correct Answer: Option B
Explanation:
Ï\(_m\)h\(_m\) = Ï\(_a\)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
Ï\(_m\)h\(_m\) = Ï\(_a\)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