Pascal's Law

An air bubble of volume $1.0 \mathrm{c}{\mathrm{m}}^3$ rises from the bottom of a lake $40 \mathrm{m}$ deep at a temperature of $12 \mathrm{℃}$. To what volume does it grow when it reaches the surface, which is of a temperature of $35 \mathrm{℃}$?

Two syringes of different cross-section (without needle) filled with water are connected with a tightly fitted rubber tube filled with water. Diameters of the smaller piston and larger piston are $1\mathrm{ }\mathrm{cm}$ and $3\mathrm{ }\mathrm{cm}$ respectively. If a force of $10\mathrm{ }\mathrm{N}$ is applied to the smaller piston then the force exerted on the larger piston is