Q. 171 A parcel of dry air having an initial temperature of $30^{\circ} \mathrm{C}$ at $1000 \mathrm{hPa}$ level is lifted adiabatically. At what pressure (in $\mathrm{hPa}$ ) its density reduces by half?
(consider the ratio of the specific heat of dry air at a constant pressure to the specific heat of dry air at a constant volume, $\mathrm{C}_{\mathrm{p}} / \mathrm{C}_{\mathrm{v}}=0.71$, rounded off to two decimal places).
