What is most likely the author’s motive for writing this article? to get you to buy sports products to get you to support nuclear power plants to get you to raise money for space programs to get you to appreciate the benefits of atomic research

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.