CAPE Physics Unit 1 · 2008 (Rest of Region) · Paper 1 · Question Q43

A child drinks orange juice of density, \rho, using a straw held vertically. The atmospheric pressure is P_a and the child can lower the pressure at the top of the straw by 20%. The MAXIMUM length of straw that would allow the child to drink the juice is

1. (A)\frac{2P_a}{\rho g}
2. (B)\frac{P_a}{2\rho g}
3. (C)\frac{P_a}{5\rho g}
4. (D)\frac{P_a}{\rho g}