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Standard VI
Chemistry
Question

A column of air 1 sq. em. in cross-sectional area extending from sea-level to the top of the atmosphere weights approximately.
  1. 933 g wt
  2. 1013 g wt
  3. 1136 g wt
  4. 1360 g wt

A
1013 g wt
B
1360 g wt
C
933 g wt
D
1136 g wt
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Solution
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Air Pressure at sea level = 101000 Pa.
Pascal :- Newton per square meter
force = 101000 N , Area =1 sq meter.
There are 10000 cm sq per meter sq ,
Weight or ma = using F = mass x
Acceleration of gravity ,
10.1 N corresponds to mass of 10.1 N /9.8 = 1.03 kg (approximate)








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