A cylindrical tube, with its base as shown in the figure, is filled with water. It is moving down with a constant acceleration a along a fixed inclined plane with angle $\mathrm{\theta }={45}^{\circ }$. P₁ and P₂ are pressure at points 1 and 2, respectively, located at the base of the tube Let $\mathrm{\beta }=\left({\mathrm{P}}_1-{\mathrm{P}}_2\right)/\left(\mathrm{\rho gd}\right)$, where $\mathrm{\rho }$ is density of water, d is the inner diameter of the tube and g is the acceleration due to gravity. Which of the following statement(s) is(are) correct ?