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A body can reduce the pressure in his ...

A body can reduce the pressure in his lungs to 750 mm of mercury. Using a straw he can drink water from a glass upto the maximum depth of _____ cm
(atmospheric pressure = 760 mm of mercury, density of mercury ` = 13.6 g cm ^(-3)` )

Text Solution

Verified by Experts

The correct Answer is:
`13 . 6`
Pressure difference between lungs and atmosphere
= ( 760 - 750) m m of hg = 10 m m of Hg = 1 cm of Hg
Let the boy can such water from depth h . Then
Pressure difference ` = h rho_("water") g = 1 cm 1 Hg`
`:. h xx 1 xx 980 = 1 xx 13 . 6 xx 980`
`rArr h = 13 . 6 cm`
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