Tis desired to predict the drag force of wind blowing at 80 mph on a house which happens tobe built as a hemisphere, with diameter = 4 m. this will be done by (a) using bucking pi method to determine which dimensionless groups are to be correlated. you should find cd= f (re). (b) using those dimensionless groups to scale down to a hemisphere of diameter 0.3 m. this scaled-down experiment will be done in a wind tunnel. what wind velocity is needed in the wind tunnel? (c) the drag force of wind blowing on the scaled-down house is measured experimentally, and we will call it fsmall. if the drag force of wind blowing at