Question

By sucking through a straw, a student can reduce the pressure in his lungs to 750 mm of Hg (density - 13.6 g cm^-2). using the straw, he can drink water from a glass upto  a maximum depth of .

Answer 1

Pressure difference between atmosphere and lungs 

∆P= 760 – 750 = 10 mm = 1 cm of Hg

Maximum depth upto which the student can suck water from a glass = 1 × 13.6 = 13.6 cm.