ANS:C - H^5/2

The discharge QQQ through a V-notch weir varies with the head HHH above the notch according to the following relationship: Q∝H5/2Q \propto H^{5/2}Q∝H5/2 This means that the discharge QQQ is proportional to H5/2H^{5/2}H5/2. Therefore, as the head HHH increases, the discharge through the V-notch weir increases as H5/2H^{5/2}H5/2. So, the correct answer is: H5/2H^{5/2}H5/2