A new blimp will move at 6 m/s in 20 °C air, and we want to predict the drag force. Using a 1:13-scale model in water at 20 °C and measuring a 2500-N drag force on the model, determine
(a) the required water velocity,
(b) the drag on the prototype blimp and,
(c) the power that will be required to propel it through the air.