Astudent is interested in the aerodynamic drag on spheres. she conducts a series of wind tunnel tests on a 10-cm-diameter sphere. the air in the wind tunnel is at 50 ∘c and 101.3 kpa. she presents the results of her tests in the form of a correlation, d = 0.0015 v 1.92, where d is the drag force in newtons and v is the velocity in m/s. another student realizes that the results would have been more effectively presented in terms of dimensionless parameters, say, π 1 = f ( π 2 ) = c π 2 a, where π 1 and π 2 are dimensionless parameters and c and a are constants. what are the most appropriate dimensionless parameters (π 1 and π 2) and the corresponding values of c and a? what would be the drag on a 2-cm-diameter sphere placed in a 1-m/s , 20 ∘c water stream?