Size Reduction and Material Handling

In pneumatic conveying, a spherical grain of diameter $d_p = 5.0\text{ mm}$ and particle density $\rho_p = 1300\text{ kg/m}^3$ is suspended in an upward air stream (air density $\rho = 1.20\text{ kg/m}^3$). Assuming turbulent flow with a constant drag coefficient $C_D = 0.44$, the terminal suspension velocity $v_t = \sqrt{\frac{4 g d_p (\rho_p - \rho)}{3 C_D \rho}}$ in $\text{m/s}$ is ________ (round off to two decimal places).