Fluid MechanicsMedium
Question
By sucking through a straw a student can reduce the pressure in the his lungs to 750 mm of Hg (density = 13.6gm/ cm3).Using the straw he can drink water4 from a glass upto a maximum depth of :
Options
A.10cm
B.75cm
C.13.6cm
D.1.36cm
Solution
Pressure difference created = 10mm of Hg This must be equal to the pressure of water column being created in the straw. If height of water column be h
hρg =
× 13.6 × g
h × 1 = 13.6 ⇒ h =13.6cm
hρg =
× 13.6 × gh × 1 = 13.6 ⇒ h =13.6cm
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