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Grade: 12th pass
        
By sucking through  a straw a boy can reduce the pressure  in his lungs to 750 mm of Hg .using a straw he can drink water from a maximum depth of?
7 months ago

Answers : (1)

Arun
21510 Points
							

Pressure difference between lungs of student and atmosphere=760 - 750 = 10 mm of Hg

hdg = 10 mm of Hg = 1 cm of Hg

This pressure can only be used to drink water.

1 cm of Hg = pressure difference due to water column

=> 1 x 13.6 x g = h x 1 x g. [d of Hg=13.6 g/cm3]

=> 1 x 13.6 = h x 1

=> h = 13.6 cm

7 months ago
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